Isolated early-type galaxies (2010)
Isolated early-type galaxies are very rare, yet offer important leverage in terms of testing galaxy formation models free of environmental processes. They also act as a valuable control sample. Here...
The star formation histories of fossil group galaxies (2010)
De La Rosa, Ignacio G., Proctor, Robert N., Mendes De Oliveira, Claudia, Forbes, Duncan A., Cid Fernandes, Roberto, Mateus, Abilio
A comparison is carried out among the star formation histories of the early-type galaxies (ETGs) in fossil groups, clusters and low density environments. Although they show similar evolutionary...
Southern GEMS groups II: HI distribution, mass functions and HI deficient galaxies (2009)
Kilborn, Virginia A., Forbes, Duncan A., Barnes, David G., Koribalski, Baerbel S., Brough, Sarah, Kern, Katie
We investigate the neutral hydrogen (HI) content of sixteen groups for which we have multi-wavelength data including X-ray observations. Wide-field imaging of the groups was obtained with the 20-cm...
Metallicity Gradients at Large Galactocentric Radii Using the Near-infrared Calcium Triplet (2009)
Foster, Caroline, Proctor, Robert N., Forbes, Duncan A., Spolaor, Max, Hopkins, Philip F., Brodie, Jean P.
We describe a new spectroscopic technique for measuring radial metallicity gradients out to large galactocentric radii. We use the DEIMOS multi-object spectrograph on the Keck telescope and the...
Globular Clusters and Satellite Galaxies: Companions to the Milky Way (2009)
Forbes, Duncan A., Kroupa, Pavel, Metz, Manuel, Spitler, Lee
Our Milky Way galaxy is host to a number of companions. These companions are gravitationally bound to the Milky Way and are stellar systems in their own right. They include a population of some 30...
Probing the 2-D kinematic structure of early-type galaxies out to 3 effective radii (2009)
Proctor, Robert N., Forbes, Duncan A., Romanowsky, Aaron J., Brodie, Jean P., Strader, Jay, Spolaor, Max, ...
We detail an innovative new technique for measuring the 2-D velocity moments (rotation velocity, velocity dispersion and Gauss-Hermite coefficients h$_3$ and h$_4$) of the stellar populations of...
The anatomy of the NGC 5044 group -- II. Stellar populations and star-formation histories (2009)
Mendel, J. Trevor, Proctor, Robert N., Rasmussen, Jesper, Brough, Sarah, Forbes, Duncan A.
The distribution of galaxy properties in groups and clusters holds important information on galaxy evolution and growth of structure in the Universe. While clusters have received appreciable...
An Ultra Compact Dwarf around the Sombrero galaxy (M104): the Nearest Massive UCD (2009)
Hau, George K. T., Spitler, Lee R., Forbes, Duncan A., Proctor, Robert N., Strader, Jay, Mendel, J. Trevor, ...
We report the discovery of an Ultra Compact Dwarf (UCD) associated with the Sombrero galaxy (M104). This is the closest massive UCD known and the first spectroscopically verified massive UCD which is...
The mass-metallicity gradient relation of early-type galaxies (2009)
Spolaor, Max, Proctor, Robert N., Forbes, Duncan A., Couch, Warrick J.
We present a newly observed relation between galaxy mass and radial metallicity gradients of early-type galaxies. Our sample of 51 early-type galaxies encompasses a comprehensive mass range from...
Globular clusters and galaxy formation (2009)
We first discuss recent progress in using the Milky Way globular cluster (GC) system as a 'test-bed' for properties derived from integrated spectra and stellar population models. Standard techniques...
The mass-metallicity gradient relation of early-type galaxies (2009)
Spolaor, Max, Proctor, Robert N., Forbes, Duncan A., Couch, Warrick J.
We present a newly observed relation between galaxy mass and radial metallicity gradients of early-type galaxies. Our sample of 51 early-type galaxies encompasses a comprehensive mass range from...
An ultra-compact dwarf around the Sombrero galaxy (M104): the nearest massive UCD (2009)
Hau, George K. T., Spitler, Lee R., Forbes, Duncan A., Proctor, Robert N., Strader, Jay, Mendel, J. Trevor, ...
We report the discovery of an ultra-compact dwarf (UCD) associated with the Sombrero galaxy (M104). This is the closest massive UCD known and the first spectroscopically verified massive UCD which is...
The outer halo globular clusters of M31 (2009)
Alves-Brito, Alan, Forbes, Duncan A., Mendel, Jon T., Hau, George K. T., Murphy, Michael T.
We present Keck/HIRES spectra of three globular clusters in the outer halo of M31, at projected distances beyond approximate to 80 kpc from M31. The measured recession velocities for all three...
The WiggleZ Dark Energy Survey: small-scale clustering of Lyman-break galaxies at z < 1 (2009)
Blake, Chris, Jurek, Russell, Brough, Sarah, Colless, Matthew, Couch, Warrick, Croom, Scott M., ...
The WiggleZ Dark Energy Survey is a large-scale structure survey of intermediate-redshift ultraviolet-selected (UV-selected) emission-line galaxies scheduled to cover 1000 deg2, spanning a broad...
The anatomy of the NGC 5044 group II: stellar populations and star-formation histories (2009)
Mendel, J. Trevor, Proctor, Robert N., Rasmussen, Jesper, Brough, Sarah, Forbes, Duncan A.
The distribution of galaxy properties in groups and clusters holds important information on galaxy evolution and growth of structure in the Universe. While clusters have received appreciable...
Globular clusters and satellite galaxies: companions to the Milky Way (2009)
Forbes, Duncan A., Kroupa, Pavel, Metz, Manuel, Spitler, Lee
Our Milky Way is host to a number of companions. These companions are gravitationally bound to the Milky Way and are stellar systems in their own right. They include a population of about 150...
Romanowsky, Aaron J., Strader, Jay, Spitler, Lee R., Johnson, Ria, Brodie, Jean P., Forbes, Duncan A., ...
NGC 1407 is the central elliptical in a nearby evolved group of galaxies apparently destined to become a galaxy cluster core. We use the kinematics of globular clusters (GCs) to probe the dynamics...
The anatomy of the NGC 5044 group II: stellar populations and star-formation histories (2009)
Mendel, J. Trevor, Proctor, Robert N., Rasmussen, Jesper, Brough, Sarah, Forbes, Duncan A.
The distribution of galaxy properties in groups and clusters holds important information on galaxy evolution and growth of structure in the Universe. While clusters have received appreciable...
Bridges, Terry J., Beasley, Michael A., Faifer, Favio Raul, Forbes, Duncan A., Forte, Juan Carlos, Gebhardt, Karl, ...
Globular cluster (GC) spectroscopy is an excellent way to study GC kinematics, ages, and abundances, and galactic dark matter content [5, 2]. Our group is using the Gemini Multi-Object Spectrograph...
Globular clusters and galaxy formation (2009)
We first discuss recent progress in using the Milky Way globular cluster (GC) system as a 'test-bed' for properties derived from integrated spectra and stellar population models. Standard techniques...
Faifer, Favio Raul, Forte, Juan Carlos, Beasley, Michael A., Bridges, Terry J., Forbes, Duncan A., Gebhardt, Karl, ...
Globular clusters (GCs) are useful tools to study the star formation and chemical evolution history as well as the dynamics and dark matter content of early-type galaxies. In this context, our group...
The globular cluster system of NGC 5846 revisited: colours, sizes and x-ray counterparts (2009)
Chies-Santos, Ana L., Santiago, Basilio X., Pastoriza, Miriani G., Forbes, Duncan A.
NGC5846 is a giant elliptical galaxy with a previously well studied globular cluster system (GCS) (e.g. [1] and [2]), known to have a bimodal colour distribution with a remarkably high red fraction....
The mass-metallicity gradient relation of early-type galaxies (2009)
Spolaor, Max, Proctor, Robert N., Forbes, Duncan A., Couch, Warrick J.
We present a newly observed relation between galaxy mass and radial metallicity gradients of early-type galaxies. Our sample of 51 early-type galaxies encompasses a comprehensive mass range from...
An ultra-compact dwarf around the Sombrero galaxy (M104): the nearest massive UCD (2009)
Hau, George K. T., Spitler, Lee R., Forbes, Duncan A., Proctor, Robert N., Strader, Jay, Mendel, J. Trevor, ...
We report the discovery of an ultra-compact dwarf (UCD) associated with the Sombrero galaxy (M104). This is the closest massive UCD known and the first spectroscopically verified massive UCD which is...
The outer halo globular clusters of M31 (2009)
Alves-Brito, Alan, Forbes, Duncan A., Mendel, Jon T., Hau, George K. T., Murphy, Michael T.
We present Keck/HIRES spectra of three globular clusters in the outer halo of M31, at projected distances beyond approximate to 80 kpc from M31. The measured recession velocities for all three...
The WiggleZ Dark Energy Survey: small-scale clustering of Lyman-break galaxies at z < 1 (2009)
Blake, Chris, Jurek, Russell, Brough, Sarah, Colless, Matthew, Couch, Warrick, Croom, Scott M., ...
The WiggleZ Dark Energy Survey is a large-scale structure survey of intermediate-redshift ultraviolet-selected (UV-selected) emission-line galaxies scheduled to cover 1000 deg2, spanning a broad...
Globular clusters and satellite galaxies: companions to the Milky Way (2009)
Forbes, Duncan A., Kroupa, Pavel, Metz, Manuel, Spitler, Lee
Our Milky Way is host to a number of companions. These companions are gravitationally bound to the Milky Way and are stellar systems in their own right. They include a population of about 150...
The anatomy of the NGC 5044 group II: stellar populations and star-formation histories (2009)
Mendel, J. Trevor, Proctor, Robert N., Rasmussen, Jesper, Brough, Sarah, Forbes, Duncan A.
The distribution of galaxy properties in groups and clusters holds important information on galaxy evolution and growth of structure in the Universe. While clusters have received appreciable...
Romanowsky, Aaron J., Strader, Jay, Spitler, Lee R., Johnson, Ria, Brodie, Jean P., Forbes, Duncan A., ...
NGC 1407 is the central elliptical in a nearby evolved group of galaxies apparently destined to become a galaxy cluster core. We use the kinematics of globular clusters (GCs) to probe the dynamics...
Probing the 2D kinematic structure of early-type galaxies out to three effective radii (2009)
Proctor, Robert N., Forbes, Duncan A., Romanowsky, Aaron J., Brodie, Jean P., Strader, Jay, Spolaor, Max, ...
We detail an innovative new technique for measuring the two-dimensional (2D) velocity moments (rotation velocity, velocity dispersion and Gauss–Hermite coefficients h3 and h4) of the stellar...
Romanowsky, Aaron J., Strader, Jay, Spitler, Lee R., Johnson, Ria, Brodie, Jean P., Forbes, Duncan A., ...
NGC 1407 is the central elliptical in a nearby evolved galaxy group apparently destined to become a cluster core. We use the kinematics of globular clusters to probe the dynamics and mass profile of...
H I mapping of galaxies in six Group Evolution Multiwavelength Study groups (2008)
Kern, Katie M., Kilborn, Virginia A., Forbes, Duncan A., Koribalski, Barbel S.
Here, we present Australia Telescope Compact Array (ATCA) H i maps of 16 H i sources in six Group Evolution Multiwavelength Study groups that were previously observed with the Parkes telescope. The...
Ma davvero vuoi fare l’astronomo? (So you want to be an astronomer?) (2008)
Abstract not available in English.
Gemini/GMOS spectroscopy of the spheroid and globular cluster system of NGC 3923 (2008)
Norris, Mark A., Sharples, Ray M., Bridges, Terry, Gebhardt, Karl, Forbes, Duncan A., Proctor, Robert, ...
We present a technique to extract ultra-deep diffuse-light spectra from the standard multi-object spectroscopic observations used to investigate extragalactic globular cluster (GC) systems. This...
Spolaor, Max, Forbes, Duncan A., Hau, George K. T., Proctor, Robert N., Brough, Sarah
This is the first paper of a series focused on investigating the star formation and evolutionary history of the two early-type galaxies NGC 1407 and NGC 1400. They are the two brightest galaxies of...
Spolaor, Max, Forbes, Duncan A., Proctor, Robert N., Hau, George K. T., Brough, Sarah
We present a possible star formation and chemical evolutionary history for two early-type galaxies NGC 1407 and NGC 1400. They are the two brightest galaxies of the NGC 1407 (or Eridanus-A) group,...
The origin of globular cluster systems from cosmological simulations (2008)
Bekki, Kenji, Yahagi, Hideki, Nagashima, Masahiro, Forbes, Duncan A.
We investigate the structural, kinematical and chemical properties of globular cluster systems (GCss) in galaxies of different Hubble types in a self-consistent manner based on high-resolution...
The anatomy of the NGC5044 group I: group membership and dynamics (2008)
Mendel, J. Trevor, Proctor, Robert N., Forbes, Duncan A., Brough, Sarah
We use a combination of new AAOmega multi-object wide-field spectroscopic observations and literature data to define 111 spectroscopically confirmed members of the massive NGC 5044 group with...
Spitler, Lee R., Forbes, Duncan A., Beasley, Michael A.
Spitzer IR Array Camera (IRAC) mid-infrared photometry is presented for the globular cluster (GC) systems of the NGC 5128 ('Centaurus A') and NGC 4594 ('Sombrero') galaxies. Existing optical...
Hau, George K. T., Bower, Richard G., Kilborn, Virginia, Forbes, Duncan A., Balogh, Michael L., Oosterloo, Tom
A common feature of hierarchical galaxy formation models is the process of 'inverse' morphological transformation: a bulge dominated galaxy accretes a gas disc, dramatically reducing the system's...
The effects of stellar populations on galaxy scaling relations in the 6dF Galaxy Survey (2008)
Proctor, Robert N., Lah, Philip, Forbes, Duncan A., Colless, Matthew, Couch, Warrick J.
We present an analysis of the stellar populations as a function of mass in a sample of ~7000 galaxies of all morphological and emission types from the 6dF Galaxy Survey. We measure velocity...
Beasley, Michael A., Bridges, Terry J., Peng, Eric, Harris, William E., Harris, Gretchen L. H., Forbes, Duncan A., ...
We have performed a spectroscopic study of globular clusters (GCs) in the nearest giant elliptical NGC 5128 using the 2dF facility at the Anglo-Australian Telescope. We obtained integrated optical...
McLaughlin, Dean E., Barmby, Pauline, Harris, William E., Forbes, Duncan A., Harris, Gretchen L. H.
We present internal surface brightness profiles, based on Hubble Space Telescope/ACS imaging in the F606W bandpass, for 131 globular cluster (GC) candidates with luminosities L = 104-3 × 106 Lo in...
So you want to be a professional astronomer! (2008)
Wanted: Astronomer. Must be willing to work occasional nights on the top of a mountain in an exotic location. A sense of adventure and nomadic lifestyle is a plus. Flexible hours and casual dress...
H I mapping of galaxies in six Group Evolution Multiwavelength Study groups (2008)
Kern, Katie M., Kilborn, Virginia A., Forbes, Duncan A., Koribalski, Barbel S.
Here, we present Australia Telescope Compact Array (ATCA) H i maps of 16 H i sources in six Group Evolution Multiwavelength Study groups that were previously observed with the Parkes telescope. The...
Spitler, Lee R., Forbes, Duncan A., Strader, Jay, Brodie, Jean P., Gallagher, Jay S.
In an effort to probe the globular cluster (GC) system of an isolated elliptical galaxy, a comprehensive analysis of the NGC 821 GC system was performed. New imaging from the WIYN Mini-Mosaic imager,...
Keck spectroscopy of globular clusters in the spiral galaxy NGC 2683 (2008)
Proctor, Robert N., Forbes, Duncan A., Brodie, Jean P., Strader, Jay
We analyse Keck spectra of 24 candidate globular clusters (GCs) associated with the spiral galaxy NGC 2683. We identify 19 bona fide GCs based on their recession velocities, of which 15 were suitable...
Uniting old stellar systems: from globular clusters to giant ellipticals (2008)
Forbes, Duncan A., Lasky, Paul, Graham, Alister W., Spitler, Lee
Elliptical galaxies and globular clusters (GCs) have traditionally been regarded as physically distinct entities due to their discontinuous distribution in key scaling diagrams involving size,...
Galactic clusters with associated Cepheid variables VII: Berkeley 58 and CG Cassiopeiae (2008)
Turner, David G., Forbes, Duncan A., English, D., Leonard, P. J. T., Scrimger, J. N., Wehlau, A. W., ...
Photoelectric, photographic and CCD UBV photometry, spectroscopic observations and star counts are presented for the open cluster Berkeley 58 to examine a possible association with the 4.37 d Cepheid...
Ma davvero vuoi fare l'astronomo? (So you want to be an astronomer?) (2008)
Abstract not available in English.
Stellar population gradients in early-type galaxies (2007)
Sanchez-Blazquez, Patricia, Forbes, Duncan A., Strader, Jay, Ocvirk, Pierre, Brodie, Jean P., Proctor, Robert N.
Long-slit spectra have been obtained with the Keck telescope for a sample of 11 early-type galaxies covering a range in luminosity. Rotation velocity and velocity dispersions, together with 20 Lick...
Cenarro, A. Javier, Beasley, Michael A., Strader, Jay, Brodie, Jean P., Forbes, Duncan A.
Understanding the stellar populations of extragalactic globular cluster (GC) systems and, in particular, determining their ages, provide essential clues to constrain the star formation histories of...
The formation and evolution of bulges as traced by globular cluster systems (2007)
Forbes, Duncan A., Spitler, Lee R.
Globular Clusters provide a unique method for tracing the formation and evolution of their host galaxies. As single stellar populations they are far easier to interpret than the multi-population...
Bekki, Kenji, Yahagi, Hideki, Nagashima, Masahiro, Forbes, Duncan A.
Recent observations have reported that the Galactic globular clusters (GCs) with unusually extended horizontal-branch (EHB) morphologies show a significantly lower velocity dispersion compared with...
The Galaxy Evolution Multi-wavelength Study (GEMS) project (2007)
Here I introduce the GEMS project, our sample and our dataset. Two results in the area of HI mapping and group dynamics are highlighted using the NGC 5044 group as an example. Finally, I briefly...
The WiggleZ Project: AAOmega and dark energy (2007)
Glazebrook, Karl, Blake, Chris, Couch, Warrick J., Forbes, Duncan A., Drinkwater, Michael J., Jurek, Russell, ...
We describe the 'WiggleZ' spectroscopic survey of 400,000 star-forming galaxies selected from a combination of GALEX ultra-violet and SDSS + RCS2 optical imaging. The fundamental goal is a detection...
Stellar population gradients in early-type galaxies (2007)
Sanchez-Blazquez, Patricia, Forbes, Duncan A., Strader, Jay, Ocvirk, Pierre, Brodie, Jean P., Proctor, Robert N.
Long-slit spectra have been obtained with the Keck telescope for a sample of 11 early-type galaxies covering a range in luminosity. Rotation velocity and velocity dispersions, together with 20 Lick...
Cenarro, A. Javier, Beasley, Michael A., Strader, Jay, Brodie, Jean P., Forbes, Duncan A.
Understanding the stellar populations of extragalactic globular cluster (GC) systems and, in particular, determining their ages, provide essential clues to constrain the star formation histories of...
The formation and evolution of bulges as traced by globular cluster systems (2007)
Forbes, Duncan A., Spitler, Lee R.
Globular Clusters provide a unique method for tracing the formation and evolution of their host galaxies. As single stellar populations they are far easier to interpret than the multi-population...
Stellar populations of globular clusters in the elliptical galaxy NGC 1407 (2007)
Cenarro, A. Javier, Beasley, Michael A., Strader, Jay, Brodie, Jean P., Forbes, Duncan A.
We present high-quality Keck spectroscopic data for a sample of 20 globular clusters (GCs) in the massive E0 galaxy NGC 1407. A subset of 20 line-strength indices of the Lick/IDS system has been...
The kinematics and dynamics of the globular clusters and planetary nebulae of NGC 5128 (2007)
Woodley, Kristin A., Harris, William E., Beasley, Michael A., Peng, Eric W., Bridges, Terry J., Forbes, Duncan A., ...
A new kinematic and dynamic study of the halo of the giant elliptical galaxy NGC 5128 is presented. From a spectroscopically confirmed sample of 340 globular clusters and 780 planetary nebulae, the...
Spatially resolved kinematics and stellar populations of brightest cluster and group galaxies (2007)
Brough, Sarah, Proctor, Robert N., Forbes, Duncan A., Couch, Warrick J., Collins, Chris A., Burke, Douglas J., ...
We present an examination of the kinematics and stellar populations of a sample of three brightest group galaxies (BGGs) and three brightest cluster galaxies (BCGs) in X-ray groups and clusters. We...
Mendel, Jon T., Proctor, Robert N., Forbes, Duncan A.
Establishing the reliability with which stellar population parameters can be measured is vital to extragalactic astronomy. Galactic globular clusters (GCs) provide an excellent medium in which to...
Damp mergers : recent gaseous mergers without significant globular cluster formation? (2007)
Forbes, Duncan A., Proctor, Robert N., Strader, Jay, Brodie, Jean P.
Here we test the idea that new globular clusters (GCs) are formed in the same gaseous ('wet') mergers or interactions that give rise to the young stellar populations seen in the central regions of...
Spatially resolved spectroscopy of early-type galaxies over a range in mass (2007)
Sanchez-Blazquez, Patricia, Forbes, Duncan A., Strader, Jay, Brodie, Jean P., Proctor, Robert N.
Long-slit spectra have been obtained with the Keck telescope for a sample of 11 early-type galaxies covering a wide range in luminosity and hence mass. Rotation velocity and velocity dispersions,...
The spatially resolved stellar populations of isolated early-type galaxies (2007)
Reda, Fatma M., Proctor, Robert N., Forbes, Duncan A., Hau, George K. T., Larsen, Soren S.
We present radial stellar population parameters for a subsample of 12 galaxies from the 36 isolated early-type galaxies of Reda et al. Using new long-slit spectra, central values and radial gradients...
Barmby, Pauline, McLaughlin, Dean E., Harris, William E., Harris, Gretchen L. H., Forbes, Duncan A.
The structures of globular clusters (GCs) reflect their dynamical states and past histories. High-resolution imaging allows the exploration of morphologies of clusters in other galaxies. Surface...
Bekki, Kenji, Yahagi, Hideki, Forbes, Duncan A.
Abstract not available.
On the structure of globular cluster systems in elliptical galaxies (2006)
Bekki, Kenji, Forbes, Duncan A.
It has long been known that the radial density profiles of globular cluster systems (GCSs) in elliptical galaxies vary with the total luminosities of their host galaxies. In order to elucidate the...
The globular cluster system of NGC 5846 revisited: colours, sizes and X-ray counterparts (2006)
Chies-Santos, A. L., Pastoriza, Miriani G., Santiago, Basilio X., Forbes, Duncan A.
NGC 5846 is a giant elliptical galaxy with a previously well studied globular cluster system (GCS), known to have a bimodal colour distribution with a remarkably high red fraction. Here we revisit...
Gaseous tidal debris found in the NGC 3783 group (2006)
Kilborn, Virginia A., Forbes, Duncan A., Koribalski, Barbel S., Brough, Sarah, Kern, Katie
Abstract not available.
A citation-based measure of scientific impact within astronomy (2006)
Pearce, Frazer R., Forbes, Duncan A.
We discuss the application of citation-based scientific impact measures described by Pearce (2004), listing various caveats and things to consider before they can be reliably applied. We also examine...
The WiggleZ Dark Energy Survey: 1000 redshifts and beyond (2006)
Drinkwater, Michael J., Pimbblet, Kevin, Jurek, Russell, Blake, Chris, Glazebrook, Karl, Woods, David, ...
Here we outline design aspects and first results of the WiggleZ Dark Energy Survey that has recently been awarded long-term status on the AAT from the 2006B semester. The primary aim of the WiggleZ...
On the structure of globular cluster systems in elliptical galaxies (2006)
Bekki, Kenji, Forbes, Duncan A.
It has long been known that the radial density profiles of globular cluster systems (GCSs) in elliptical galaxies vary with the total luminosities of their host galaxies. In order to elucidate the...
Bekki, Kenji, Yahagi, Hideki, Forbes, Duncan A.
Abstract not available.
The globular cluster kinematics and galaxy dark matter content of NGC 4649 (M60) (2006)
Bridges, Terry, Gebhardt, Karl, Sharples, Ray, Faifer, Favio R., Forte, Juan C., Beasley, Michael A., ...
From observations with the GMOS multislit spectrograph on the Gemini North telescope, we have obtained spectra for 39 globular cluster (GC) candidates in the Virgo giant elliptical galaxy NGC 4649...
Southern GEMS groups I : dynamical properties (2006)
Brough, Sarah, Forbes, Duncan A., Kilborn, Virginia A., Couch, Warrick
Abstract not available.
Eridanus: a supergroup in the local universe? (2006)
Brough, Sarah, Forbes, Duncan A., Kilborn, Virginia A., Couch, Warrick, Colless, Matthew
We examine a possible supergroup in the direction of the Eridanus constellation using 6dF Galaxy Survey second data release (6dFGS DR2) positions and velocities together with Two-Micron All-Sky...
The Group Evolution Multiwavelength Study (GEMS): the sample and datasets (2006)
Forbes, Duncan A., Ponman, Trevor, Pearce, Frazer, Osmond, John, Kilborn, Virginia A., Brough, Sarah, ...
Galaxy groups have been under-studied relative to their richer counterparts -- clusters. The Group Evolution Multiwavelength Study (GEMS) aims to redress some of the balance. Here we describe the...
The globular cluster system of NGC 5846 revisited: colours, sizes and X-ray counterparts (2006)
Chies-Santos, A. L., Pastoriza, Miriani G., Santiago, Basilio X., Forbes, Duncan A.
NGC 5846 is a giant elliptical galaxy with a previously well studied globular cluster system (GCS), known to have a bimodal colour distribution with a remarkably high red fraction. Here we revisit...
X-ray observations of three young, early-type galaxies (2006)
Sansom, Anne E., O'Sullivan, Esther, Forbes, Duncan A., Proctor, Robert N., Davis, D. Scott
Massive haloes of hot plasma exist around some, but not all elliptical galaxies. There is evidence that this is related to the age of the galaxy. In this paper, new X-ray observations are presented...
Gaseous tidal debris found in the NGC 3783 group (2006)
Kilborn, Virginia A., Forbes, Duncan A., Koribalski, Barbel S., Brough, Sarah, Kern, Katie
Abstract not available.
Spitler, Lee R., Larsen, Soren S., Strader, Jay, Brodie, Jean P., Forbes, Duncan A., Beasley, Michael A.
A detailed imaging analysis of the globular cluster (GC) system of the Sombrero galaxy (NGC 4594) has been accomplished using a six-image mosaic from the Hubble Space Telescope Advanced Camera for...
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan A.
Abstract not available.
Radial kinematics of isolated elliptical galaxies (2006)
Hau, G. K. T., Forbes, Duncan A.
Ellipticals in very low-density environments are extremely rare but hold important clues about galaxy formation and evolution. In this paper, we continue our study of isolated elliptical galaxies,...
Gemini/GMOS spectra of globular clusters in the Leo group elliptical NGC 3379 (2006)
Pierce, Michael, Beasley, Michael A., Forbes, Duncan A., Bridges, Terry, Gebhardt, Karl, Faifer, Favio R., ...
Abstract not available.
Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649 (2006)
Pierce, Michael, Bridges, Terry, Forbes, Duncan A., Proctor, Robert, Beasley, Michael A., Gebhardt, Karl, ...
NGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS (Gemini North Multi-Object Spectrograph) spectra for 38 globular clusters (GCs) associated with this...
An imaging study of the globular cluster systems of NGC 1407 and 1400 (2006)
Forbes, Duncan A., Sanchez-Blazquez, Patricia, Phan, Anna T. T., Brodie, Jean P., Strader, Jay, Spitler, Lee R.
We present wide-field Keck telescope imaging of the globular cluster (GC) systems around NGC 1407 and 1400 in the Eridanus galaxy cloud. This is complemented by Hubble Space Telescope (HST) images...
Formation of globular clusters in galaxy mergers (2006)
Bekki, Kenji, Couch, Warrick J., Forbes, Duncan A., Beasley, Michael A.
Our numerical simulations first demonstrate that the pressure of ISM in a major merger becomes so high (> 10(5) k(B) K cm(-3)) that GMCs in the merger can collapse to form globular clusters (GCs)...
Galaxy groups: proceedings from a Swinburne University Workshop (2005)
Kilborn, Virginia A., Bekki, Kenji, Brough, Sarah, Doyle, Marianne T., Evstigneeva, Ekaterina A., Forbes, Duncan A., ...
We present the proceedings from a two-day workshop held at Swinburne University on 2005 May 24–25. The workshop participants highlighted current Australian research on both theoretical and...
Bekki, Kenji, Couch, Warrick J., Forbes, Duncan A., Beasley, Michael A.
Abstract not available.
Formation of star clusters in the LMC and SMC (2005)
Bekki, Kenji, Couch, Warrick J., Forbes, Duncan A., Beasley, Michael A.
Abstract not available.
Globular clusters in early-type galaxies with GMOS (2005)
Bridges, Terry J., Beasley, Michael A., Faifer, Favio Raul, Forbes, Duncan A., Forte, Juan Carlos, Gebhardt, Karl, ...
We present recent results from our long-term Gemini/GMOS study of globular clusters in early-type galaxies. To date, we have obtained photometry and spectroscopy for clusters in NGCs 3379, 4649, 524,...
Mundell, Carole G., James, Phil A., Loiseau, Nora, Schinnerer, Eva, Forbes, Duncan A.
J1023+1952 is a cloud of neutral hydrogen located at the base of a tidal tail, associated with the interacting Seyfert system NGC 3227/6 that was discovered by Mundell et al. and identified as a...
Evolutionary history of the elliptical galaxy NGC 1052 (2005)
Pierce, Michael, Brodie, Jean P., Forbes, Duncan A., Beasley, Michael A., Proctor, Robert N., Strader, Jay
No abstract available.
A wide-field H I study of the NGC 1566 group (2005)
Kilborn, Virginia A., Koribalski, Barbel S., Barnes, David G., Forbes, Duncan A., Musgrave, Ruth C.
No abstract available.
Galaxy groups: proceedings from a Swinburne University workshop (2005)
Kilborn, Virginia A., Bekki, Kenji, Brough, Sarah, Doyle, Marianne T., Evstigneeva, Ekaterina A., Forbes, Duncan A., ...
We present the proceedings from a two-day workshop held at Swinburne University on 2005 May 24–25. The workshop participants highlighted current Australian research on both theoretical and...
Bimodal galaxies and bimodality in globular cluster systems (2005)
Abstract not available.
Group, field and isolated early-type galaxies - II. Global trends from nuclear data (2005)
Denicolo, G., Terlevich, Roberto, Terlevich, Elana, Forbes, Duncan A., Terlevich, Alejandro I.
Abstract not available.
Group, field and isolated early-type galaxies - I. Observations and nuclear data (2005)
Denicolo, G., Terlevich, Roberto, Terlevich, Elana, Forbes, Duncan A., Terlevich, Alejandro I., Carrasco, L.
Abstract not available.
The DEEP Groth strip galaxy redshift survey. III. Redshift catalog and properties of galaxies (2005)
Weiner, Benjamin J., Phillips, Andrew C., Faber, S. M., Willmer, Christopher N., Vogt, Nicole P., Simard, Luc, ...
The Deep Extragalactic Evolutionary Probe (DEEP) is a series of spectroscopic surveys of faint galaxies, targeted at understanding the properties and clustering of galaxies at redshifts z~1. We...
Kinematics of globular cluster systems and the formation of early-type galaxies (2005)
Bekki, Kenji, Beasley, Michael A., Brodie, Jean P., Forbes, Duncan A.
Abstract not available.
The correlation of metallicity gradient with galaxy mass (2005)
Forbes, Duncan A., Sanchez-Blasquez, Patricia, Proctor, Robert N.
A number of previous studies have searched for a correlation between radial metallicity gradients and early-type galaxy mass – no convincing trends have been found. Here we re-examine this issue...
Old globular clusters masquerading as young in NGC 4365? (2005)
Brodie, Jean P., Strader, Jay, Denicolo, Glenda, Beasley, Michael A., Cennaro, A. J., Larsen, Soren S., ...
High signal-to-noise ratio, low-resolution spectra have been obtained for 22 globular clusters (GCs) in NGC 4365. Some of these were selected as probable representatives of an intermediate-age (25...
Extragalactic globular clusters: Old spectroscopic ages and new views on their formation (2005)
Strader, Jay, Brodie, Jean P., Cennaro, A. J., Beasley, Michael A., Forbes, Duncan A.
Abstract not available.
Beasley, Michael A., Brodie, Jean P., Strader, Jay, Forbes, Duncan A., Proctor, Robert N., Barmby, Pauline, ...
We derive ages, metallicities, and abundance ratios ([α/Fe]) from the integrated spectra of 23 globular clusters in M31 by employing multivariate fits to two different stellar population models. We...
Spatially resolved stellar populations in the isolated elliptical NGC 821 (2005)
Proctor, Robert N., Forbes, Duncan A., Forestell, Amy, Gebhardt, Karl
We present the analysis of Lick absorption-line indices from three separate long-slit spectroscopic observations of the nearby isolated elliptical galaxy NGC 821. The three data sets present a...
The fundamental plane of isolated early-type galaxies (2005)
Reda, Fatma M., Forbes, Duncan A., Hau, George K. T.
Abstract not available.
The discovery of new galaxy members in the NGC 5044 and 1052 groups (2004)
McKay, N. P., Mundell, Carole, Brough, Sarah, Forbes, Duncan A., Barnes, David G., James, Phil A., ...
We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and...
The photometric properties of isolated early-type galaxies (2004)
Reda, Fatma M., Forbes, Duncan A., Beasley, Michael A., O'Sullivan, Ewan, Goudfrooij, Paul
Not available.
Beasley, Michael A., Kawata, Daisuke, Pearce, Frazer R., Forbes, Duncan A., Gibson, Brad K.
We explore a scenario in which metal-poor globular clusters (GCs) are enriched by the first supernovae in the universe. If the first stars in a 107 Msolar dark halo were very massive (>180 Msolar),...
The kinematic properties of isolated elliptical galaxies (2004)
Forbes, Duncan A., Hau, George K. T., Reda, Fatma M.
Ellipticals in very low density environments are extremely rare but hold important clues about galaxy formation and evolution. We present results of an investigation of their internal dynamics. We...
Bekki, Kenji, Beasley, Michael A., Forbes, Duncan A., Couch, Warrick J.
We demonstrate that single and binary star clusters can be formed during cloud-cloud collisions triggered by the tidal interaction between the Large and Small Magellanic clouds. We run two different...
Explaining the mysterious age gap of globular clusters in the Large Magellanic Cloud (2004)
Bekki, Kenji, Couch, Warrick J., Beasley, Michael A., Forbes, Duncan A., Chiba, Masashi, Da Costa, Gary S.
The Large Magellanic Cloud (LMC) has a unique cluster formation history in that nearly all of its globular clusters were formed either ~13 Gyr ago or less than ~3 Gyr ago. It is not clear what...
The chemical properties of Milky Way and M31 globular clusters I : a comparative study (2004)
Beasley, Michael A., Brodie, Jean P., Strader, Jay, Forbes, Duncan A., Proctor, Robert N., Barmby, Pauline, ...
Abstract not available.
Gemini/GMOS imaging of globular clusters in the Virgo galaxy NGC 4649 (M60) (2004)
Forbes, Duncan A., Faifer, Favio R., Forte, Juan C., Bridges, Terry J., Beasley, Michael A., Gebhardt, Karl, ...
Not available.
Proctor, Robert N., Forbes, Duncan A., Beasley, Michael A.
We define a method for the analysis of the integrated spectra of extragalactic globular clusters that provides more reliable measures of the age, metallicity and α-element abundance ratio than have...
The globular cluster system of the Canis Major dwarf galaxy (2004)
Forbes, Duncan A., Strader, Jay, Brodie, Jean P.
Prompted by the discovery of the accreted Canis Major dwarf galaxy and its associated globular cluster (GC) system, we investigate the contribution of accreted GCs to the Galactic system. The Canis...
Probing spectral line gradients beyond one effective radius in NGC 3610 (2004)
Howell, Justin H., Brodie, Jean P., Strader, Jay, Forbes, Duncan A., Proctor, Robert N.
The outer region [(0.75-1.25)re in the B band] of the merger remnant elliptical galaxy NGC 3610 is studied using extremely high signal-to-noise ratio Keck spectra, with a supplementary spectrum of...
Ages and metallicities of Hickson compact group galaxies (2004)
Proctor, Robert N., Forbes, Duncan A., Hau, George K. T., Beasley, Michael A., De Silva, Gayadhi, Contreras, Rodrigo, ...
Hickson compact groups (HCGs) constitute an interesting extreme in the range of environments in which galaxies are located, as the space density of galaxies in these small groups are otherwise only...
The photometric properties of isolated early-type galaxies (2004)
Reda, Fatma M., Forbes, Duncan A., Beasley, Michael A., O'Sullivan, Ewan, Goudfrooij, Paul
Not available.
Scaling relations in early-type galaxies belonging to groups (2004)
Khosroshahi, Habib G., Raychaudhury, Somak, Ponman, Trevor J., Miles, Trevor A., Forbes, Duncan A.
We present a photometric analysis of a large sample of early-type galaxies in 16 nearby groups, imaged with the Wide-Field Camera on the Isaac Newton Telescope. Using a two-dimensional surface...
The discovery of new galaxy members in the NGC 5044 and 1052 groups (2004)
McKay, N. P., Mundell, Carole, Brough, Sarah, Forbes, Duncan A., Barnes, David G., James, Phil A., ...
We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and...
Miles, Trevor A., Raychaudhury, Somak, Forbes, Duncan A., Goudfrooij, Paul, Ponman, Trevor J., Kozhurina-Platais, Vera
Not available.
Mundell, Carole G., James, Phil A., Loiseau, Nora, Schinnerer, Eva, Forbes, Duncan A.
Not available.
Metal-poor globular clusters and galaxy formation (2004)
Strader, Jay, Brodie, Jean P., Forbes, Duncan A.
Not available.
Revisiting the globular cluster system of the merger remnant elliptical galaxy NGC 3610 (2004)
Strader, Jay, Brodie, Jean P., Forbes, Duncan A.
We have obtained Keck spectra of six candidate globular clusters (GCs) in the dynamically young elliptical galaxy NGC 3610, supplementing our previous Keck spectra of eight confirmed GCs. Five of our...
Burstein, David, Li, Yong, Freeman, Ken C., Norris, John, Bessell, Michael S., Bland-Hawthorn, Joss, ...
We find that the globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise two distinct entities, differing in three respects. First, M31 has a set of young...
Keck spectroscopy and imaging of globular clusters in the lenticular galaxy NGC 524 (2004)
Beasley, Michael A., Forbes, Duncan A., Brodie, Jean P., Kissler-Patig, Markus
Not available.
Beasley, Michael A., Kawata, Daisuke, Pearce, Frazer R., Forbes, Duncan A., Gibson, Brad K.
We explore a scenario in which metal-poor globular clusters (GCs) are enriched by the first supernovae in the universe. If the first stars in a 107 Msolar dark halo were very massive (>180 Msolar),...
The kinematic properties of isolated elliptical galaxies (2004)
Forbes, Duncan A., Hau, George K. T., Reda, Fatma M.
Ellipticals in very low density environments are extremely rare but hold important clues about galaxy formation and evolution. We present results of an investigation of their internal dynamics. We...
Beasley, Michael A., Bekki, Kenji, Couch, Warrick J., Forbes, Duncan A.
We investigate, via numerical simulations, the tidal stripping and accretion of globular clusters (GCs). In particular, we focus on creating models that simulate the situation for the GC systems of...
UBRI photometry of globular clusters in the Leo group galaxy NGC 3379 (2003)
Whitlock, Shannon M., Forbes, Duncan A., Beasley, Michael A.
We present wide-area UBRI photometry for globular clusters around the Leo group galaxy NGC 3379. Globular cluster candidates are selected from their B-band magnitudes and their (U-B)o versus (B-I)o...
Evidence for an intermediate-age, metal-rich population of globular clusters in NGC 4365 (2003)
Larsen, Soren S., Brodie, Jean P., Beasley, Michael A., Forbes, Duncan A., Kissler-Patig, Markus, Kuntschner, Harald, ...
Abstract not available.
Forming globular cluster systems in a semi-analytic scheme (2003)
Forbes, Duncan A., Beasley, Michael A., Baugh, Carlton M., Sharples, Ray M., Frenk, Carlos S.
We apply the semi-analytical galaxy formation code of Cole et al. to investigate the formation of globular cluster (GC) systems in hierarchical clustering scenarios. The nature of the model allows us...
Simultaneous modelling of the stellar halo and globular cluster system of NGC 5128 (2003)
Beasley, Michael A., Forbes, Duncan A., Harris, Gretchen L., Harris, William E.
Abstract not available.
Beasley, Michael A., Bekki, Kenji, Couch, Warrick J., Forbes, Duncan A.
We investigate, via numerical simulations, the tidal stripping and accretion of globular clusters (GCs). In particular, we focus on creating models that simulate the situation for the GC systems of...
Near-infrared imaging of ellipticals : surface brightness profiles and photometry (2003)
Bothun, Greg, Brodie, Jean P., Brown, Richard J., Forbes, Duncan A., Goudfrooij, Paul, Hau, George K., ...
We present near-infrared K-band imaging of a large sample of candidate merger remnant galaxies and Hickson Compact Group ellipticals. We derive light profile indices, effective radii and surface...
UBRI photometry of globular clusters in the Leo group galaxy NGC 3379 (2003)
Whitlock, Shannon M., Forbes, Duncan A., Beasley, Michael A.
We present wide-area UBRI photometry for globular clusters around the Leo group galaxy NGC 3379. Globular cluster candidates are selected from their B-band magnitudes and their (U-B)o versus (B-I)o...
Galaxy disruption in a halo of dark matter (2003)
Forbes, Duncan A., Beasley, Michael A., Bekki, Kenji, Brodie, Jean P., Strader, Jay
The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of disruption has remained elusive. We...
Spectroscopy of globular clusters in the Fornax dwarf galaxy (2003)
Strader, Jay, Brodie, Jean P., Forbes, Duncan A., Beasley, Michael A., Huchra, John P.
We present low-resolution, integrated Keck spectra of the five globular clusters (GCs) of the Fornax dwarf spheroidal galaxy. We find a tentative age spread among the clusters, with the GC H5 younger...
Evidence for an intermediate-age, metal-rich population of globular clusters in NGC 4365 (2003)
Larsen, Soren S., Brodie, Jean P., Beasley, Michael A., Forbes, Duncan A., Kissler-Patig, Markus, Kuntschner, Harald, ...
Abstract not available.
Globular clusters in early-type galaxies (2003)
Since the Pucon Globular Cluster meeting in March 2001, there has been considerable progress in obtaining high quality spectra for Globular Clusters (GCs) around early-type galaxies. This combined...
Forming globular cluster systems semi-analytically (2003)
Beasley, Michael A., Baugh, Carlton M., Forbes, Duncan A., Sharples, Ray M., Frenk, Carlos S.
We describe a scheme for the formation of globular cluster systems in early-type galaxies using a semi-analytic model of galaxy formation. Operating within a lambda CDM cosmology, we assume that...
Globular clusters and galaxy formation (2003)
I summarize the known properties of globular cluster systems. Often the globular cluster systems of spirals and ellipticals are remarkably similar. Photometry, and the limited spectra available, are...
Forming globular cluster systems in a semi-analytic scheme (2003)
Forbes, Duncan A., Beasley, Michael A., Baugh, Carlton M., Sharples, Ray M., Frenk, Carlos S.
We apply the semi-analytical galaxy formation code of Cole et al. to investigate the formation of globular cluster (GC) systems in hierarchical clustering scenarios. The nature of the model allows us...
Radio observations of super star clusters in dwarf starburst galaxies (2002)
Stevens, Ian R., Forbes, Duncan A., Norris, Ray P.
We present new radio continuum observations of two dwarf starburst galaxies, NGC 3125 and 5408, with observations at 4.80 GHz (6 cm) and 8.64 GHz (3 cm), taken with the Australia Telescope Compact...
A catalogue and analysis of local galaxy ages and metallicities (2002)
Terlevich, Ale I., Forbes, Duncan A.
We have assembled a catalogue of relative ages, metallicities and abundance ratios for about 150 local galaxies in field, group and cluster environments. The galaxies span morphological types from cD...
Bekki, Kenji, Forbes, Duncan A., Beasley, Michael A., Couch, Warrick J.
We investigate the spatial, kinematic and chemical properties of globular cluster systems formed in merging and interacting galaxies using N-body-smoothed particle hydrodynamics (SPH) simulations....
On the formation of globular cluster systems in a hierarchical universe (2002)
Beasley, Michael A., Baugh, Carlton, Forbes, Duncan A., Sharples, Ray, Frenk, Carlos S.
Abstract not available.
Radio observations of super star clusters in dwarf starburst galaxies (2002)
Stevens, Ian R., Forbes, Duncan A., Norris, Ray P.
We present new radio continuum observations of two dwarf starburst galaxies, NGC 3125 and 5408, with observations at 4.80 GHz (6 cm) and 8.64 GHz (3 cm), taken with the Australia Telescope Compact...
A catalogue and analysis of local galaxy ages and metallicities (2002)
Terlevich, Ale I., Forbes, Duncan A.
We have assembled a catalogue of relative ages, metallicities and abundance ratios for about 150 local galaxies in field, group and cluster environments. The galaxies span morphological types from cD...
Bekki, Kenji, Forbes, Duncan A., Beasley, Michael A., Couch, Warrick J.
We investigate the spatial, kinematic and chemical properties of globular cluster systems formed in merging and interacting galaxies using N-body-smoothed particle hydrodynamics (SPH) simulations....
On the formation of globular cluster systems in a hierarchical universe (2002)
Beasley, Michael A., Baugh, Carlton, Forbes, Duncan A., Sharples, Ray, Frenk, Carlos S.
Abstract not available.
Keck spectroscopy of globular clusters in the sombrero galaxy (2002)
Larsen, Soren S., Brodie, Jean P., Beasley, Michael A., Forbes, Duncan A.
Abstract not available.
Observational properties of extragalactic globular cluster systems (2002)
The superior resolution of HST and the light gathering power of large 8-10m class telescopes are now providing information on distant globular clusters (GCs) that is comparable to that obtained in...
Neutral hydrogen in galaxy groups (2002)
Forbes, Duncan A., Mundell, C. G., Brough, Sarah, Barnes, David G.
We present preliminary results from a study of the neutral hydrogen (Hi) properties of an X-ray selected sample of nearby loose galaxy groups. This forms part of a multi-wavelength investigation...
A catalogue and analysis of X-ray luminosities of early-type galaxies (2001)
O'Sullivan, Ewan, Forbes, Duncan A., Ponman, Trevor
We present a catalogue of X-ray luminosities for 401 early-type galaxies, of which 136 are based on newly analysed ROSAT PSPC pointed observations. The remaining luminosities are taken from the...
Hubble Space Telescope photometry of globular clusters in the Sombrero galaxy (2001)
Larsen, Soren S., Forbes, Duncan A., Brodie, Jean P.
A large number of early-type galaxies are now known to possess blue and red subpopulations of globular clusters. We have compiled a data base of 28 such galaxies exhibiting bimodal globular cluster...
Structural evolution in elliptical galaxies: the age-shape relation (2001)
Ryden, Barbara S., Forbes, Duncan A., Terlevich, Ale
We test the hypothesis that the apparent axial ratio of an elliptical galaxy is correlated with the age of its stellar population. We find that old ellipticals (with estimated ages t>7.5 Gyr) are...
Keck imaging of the globular cluster systems in the early-type galaxies NGC 1052 and 7332 (2001)
Forbes, Duncan A., Georgakakis, Antonis, Brodie, Jean P.
The presence of two globular cluster subpopulations in early-type galaxies is now the norm rather than the exception. Here we present two more examples for which the host galaxy appears to have...
Cold gas in elliptical galaxies (2001)
Georgakakis, Antonis, Hopkins, A. M., Caulton, A., Wiklind, T., Terlevich, A. I., Forbes, Duncan A.
We explore the evolution of the cold gas (molecular and neutral hydrogen) of elliptical galaxies and merger remnants ordered into a time sequence on the basis of spectroscopic age estimates. We find...
Wang, Zhongxiang, Chakrabarty, Deepto, Roche, Paul, Charles, Philip A., Kuulkers, Erik, Shahbaz, Tariq, ...
We present multiband optical/IR photometry of V4580 Sgr, the optical counterpart of the accretion-powered millisecond pulsar SAX J1808.4-3658, taken during the 1998 X-ray outburst of the system. The...
Age estimates for globular clusters in NGC 1399 (2001)
Beasley, Michael A., Forbes, Duncan A., Brodie, Jean P., Kissler-Patig, Markus
We present high signal-to-noise Keck spectra for 10 globular clusters associated with the giant Fornax elliptical galaxy NGC 1399 and compare measured line indices with current stellar population...
Bulge globular clusters in spiral galaxies (2001)
Forbes, Duncan A., Brodie, Jean A., Larsen, Soren S.
There is now strong evidence that the metal-rich globular clusters (GCs) near the center of our Galaxy are associated with the Galactic bulge rather than the disk as previously thought. Here we...
Properties of globular cluster systems in nearby early-type galaxies (2001)
Larsen, Soren S., Brodie, Jean P., Huchra, John, Forbes, Duncan A., Grillmair, Carl J.
We present a study of globular clusters (GCs) in 17 relatively nearby early-type galaxies, based on deep F555W and F814W images from the Wide Field Planetary Camera 2, on board the Hubble Space...
Hubble Space Telescope photometry of globular clusters in the Sombrero galaxy (2001)
Larsen, Soren S., Forbes, Duncan A., Brodie, Jean P.
A large number of early-type galaxies are now known to possess blue and red subpopulations of globular clusters. We have compiled a data base of 28 such galaxies exhibiting bimodal globular cluster...
The X-ray emission in post-merger ellipticals (2001)
O'Sullivan, Ewan, Forbes, Duncan A., Ponman, Trevor
The evolution in X-ray properties of early-type galaxies is largely unconstrained. In particular, little is known about how, and if, remnants of mergers generate hot gas haloes. Here we examine the...
Structural evolution in elliptical galaxies: the age-shape relation (2001)
Ryden, Barbara S., Forbes, Duncan A., Terlevich, Ale
We test the hypothesis that the apparent axial ratio of an elliptical galaxy is correlated with the age of its stellar population. We find that old ellipticals (with estimated ages t>7.5 Gyr) are...
The connection between globular cluster systems and the host galaxies (2001)
Forbes, Duncan A., Forte, Juan C.
A large number of early-type galaxies are now known to possess blue and red subpopulations of globular clusters. We have compiled a data base of 28 such galaxies exhibiting bimodal globular cluster...
Keck imaging of the globular cluster systems in the early-type galaxies NGC 1052 and 7332 (2001)
Forbes, Duncan A., Georgakakis, Antonis, Brodie, Jean P.
The presence of two globular cluster subpopulations in early-type galaxies is now the norm rather than the exception. Here we present two more examples for which the host galaxy appears to have...
The globular cluster system of the young elliptical NGC 6702 (2001)
Georgakakis, Antonis, Forbes, Duncan A., Brodie, Jean P.
We study the globular cluster (GC) system of the dust-lane elliptical galaxy NGC 6702, using B-, V- and I-band imaging observations carried out at the Keck telescope. This galaxy has a spectroscopic...
Cold gas in elliptical galaxies (2001)
Georgakakis, Antonis, Hopkins, A. M., Caulton, A., Wiklind, T., Terlevich, A. I., Forbes, Duncan A.
We explore the evolution of the cold gas (molecular and neutral hydrogen) of elliptical galaxies and merger remnants ordered into a time sequence on the basis of spectroscopic age estimates. We find...
X-ray luminosities of galaxies in groups (2001)
Helsdon, Stephen F., Ponman, Trevor, O'Sullivan, Ewan, Forbes, Duncan A.
Not available.
A catalogue and analysis of X-ray luminosities of early-type galaxies (2001)
O'Sullivan, Ewan, Forbes, Duncan A., Ponman, Trevor
We present a catalogue of X-ray luminosities for 401 early-type galaxies, of which 136 are based on newly analysed ROSAT PSPC pointed observations. The remaining luminosities are taken from the...
Cold gas and star formation in a merging galaxy sequence (2001)
Georgakakis, Antonis E., Forbes, Duncan A., Norris, Ray P.
The evolution of the cold gas and the star-formation activity during galaxy interactions is explored using a merging galaxy sequence comprising both pre- and post-merger candidates. The evolutionary...
The globular cluster systems of ellipticals and spirals (2001)
In this overview of the key properties of globular cluster (GC) systems I show that the GCs in elliptical and spiral host galaxies have more in common than previously thought. After contrasting these...
The elliptical galaxy formerly known as the Local Group: merging the globular cluster systems (2000)
Forbes, Duncan A., Masters, Karen L., Minniti, Dante, Barmby, Pauline
Prompted by a new catalogue of M31 globular clusters, we have collected together individual metallicity values for globular clusters in the Local Group. Although we briefly describe the globular...
Cold gas and star formation in a merging galaxy sequence (2000)
Georgakakis, Antonis, Forbes, Duncan A., Norris, Ray P.
We explore the evolution of the cold gas (molecular and neutral hydrogen) and star formation activity during galaxy interactions, using a merging galaxy sequence comprising both pre- and post-merger...
The black hole mass-galaxy age relation (2000)
Merrifield, Michael R., Forbes, Duncan A., Terlevich, Alejandro I.
We present evidence that there is a significant correlation between the fraction of the mass of a galaxy that lies in its central black hole and the age of the galactic stellar population. Since the...
Imaging of the protoelliptical NGC 1700 and its globular cluster system (2000)
Brown, Richard J., Forbes, Duncan A., Kissler-Patig, Markus, Brodie, Jean P.
An excellent candidate for a young elliptical, or 'protoelliptical' galaxy is NGC 1700. Here we present new B-, V- and I-band imaging using the Keck telescope, and reanalyse existing V- and I-band...
Multiwavelength observations of an evolved galaxy group: an end-point of galaxy merging? (2000)
Jones, L. R., Ponman, Trevor J., Forbes, Duncan A.
The group of galaxies RXJ1340.6+4018 has approximately the same bolometric X-ray luminosity as other bright galaxy groups and poor clusters such as the Virgo cluster. However, 70 per cent of the...
Imaging of the merging galaxy NGC 3597 and its population of protoglobular clusters (2000)
Forbes, Duncan A., Hau, G. K. T.
We present wide field-of-view near-infrared imaging from the NTT and very deep optical imaging from the HST of the young merging galaxy NGC 3597. The morphology of the galaxy and the properties of...
M31 globular clusters: colors and metallicities (2000)
Barmby, Pauline, Huchra, John P., Brodie, Jean P., Forbes, Duncan A., Schroder, Linda L., Grillmair, Carl J.
We present a new catalog of photometric and spectroscopic data on M31 globular clusters (GCs). The catalog includes new optical and near-infrared photometry for a substantial fraction of the 435...
A multiwavelength view at the heart of the superwind in NGC 253 (2000)
Forbes, Duncan A., Polehampton, Edward, Stevens, Ian R., Brodie, Jean P., Ward, Martin J.
Although NGC 253 is one of the nearest starburst galaxies, the activity in its central regions is yet to be fully understood. Here we present new optical data from the Hubble Space Telescope of its...
Age estimates for galaxies in groups (1999)
Forbes, Duncan A., Terlevich, Alejandro I.
We discuss recent developments on the age and metallicity distribution for early type galaxies in different environments.
On the relationship between age and dynamics in elliptical galaxies (1999)
Forbes, Duncan A., Ponman, Trevor J.
Galaxy age estimates (mostly from spectroscopy of the central regions) are now available for many early-type galaxies. In a previous paper we showed that the offset of galaxies from the fundamental...
Grillmair, Carl J., Forbes, Duncan A., Brodie, Jean P., Elson, Rebecca A. W.
We examine the luminosity and B-I color distribution of globular clusters for three early-type galaxies in the Fornax Cluster using imaging data from the Wide Field Planetary Camera 2 on the Hubble...
The complex radio and X-ray structure in the nuclear regions of the active galaxy NGC 1365 (1999)
Stevens, Ian R., Forbes, Duncan A., Norris, Ray P.
We present a multiwavelength analysis of the prominent active galaxy NGC 1365, in particular looking at the radio and X-ray properties of the central regions of the galaxy. We analyse ROSAT (PSPC and...
Globular clusters in elliptical galaxies: constraints on mergers (1999)
There exists a relationship between globular cluster mean metallicity and parent galaxy luminosity (e.g. Brodie & Huchra 1991; Forbes et al. 1996), which appears to be similar to that between stellar...
HST imaging of the globular clusters in the Fornax Cluster: NGC 1399 and NGC 1404 (1998)
Forbes, Duncan A., Grillmair, Carl J., Williger, Gerard M., Elson, Rebecca A. W., Brodie, Jean P.
The Fornax cluster galaxies NGC 1399 and NGC 1404 are ideal for studying the effects of a cluster environment on globular cluster systems. Here we present new optical imaging of these two galaxies...
Star formation in southern Seyfert galaxies (1998)
Forbes, Duncan A., Norris, R. P.
We have produced radio maps, using the Australia Telescope Compact Array, of the central regions of six southern type 2 Seyfert galaxies (NGC 1365, 4945, 6221, 6810, 7582 and Circinus) with...
Keck spectroscopy of candidate proto-globular clusters in NGC 1275 (1998)
Brodie, Jean P., Schroder, Linda L., Huchra, John P., Phillips, Andrew C., Kissler-Patig, Markus, Forbes, Duncan A.
Keck spectroscopy of five proto-globular cluster candidates in NGC 1275 has been combined with Hubble Space Telescope Wide Field Planetary Camera 2 photometry to explore the nature and origin of...
HST imaging of the globular clusters in the Fornax Cluster: NGC 1379 (1998)
Elson, Rebecca A. W., Grillmair, Carl J., Forbes, Duncan A., Rabban, Mike, Williger, Gerard M., Brodie, Jean P.
We present B and I photometry for ∼300 globular cluster candidates in NGC 1379, an E0 galaxy in the Fornax cluster. Our data are from both Hubble Space Telescope (HST) and ground-based...
Constraints on the merger models of elliptical galaxies from their globular cluster systems (1998)
Kissler-Patig, Markus, Forbes, Duncan A., Minniti, Dante
The discovery of protoglobular cluster candidates in many present-day mergers allows us to understand better the possible effects of a merger event on the globular cluster system of a galaxy, and to...
Keck spectroscopy of globular clusters around NGC 1399 (1998)
Kissler-Patig, Markus, Brodie, Jean P., Schroder, Linda L., Forbes, Duncan A., Grillmair, Carl J., Huchra, John P.
We report moderate-resolution, high signal-to-noise ratio spectroscopy of globular clusters around NGC 1399, the central cD galaxy in the Fornax Cluster. We address issues as diverse as elemental...
Dependence of the Fundamental Plane scatter on galaxy age (1998)
Forbes, Duncan A., Ponman, Trevor J., Brown, Richard J. N.
The fundamental plane (FP) has an intrinsic scatter that cannot be explained purely by observational errors. Using the recently available age estimates for nearby early-type galaxies, we show that a...
Hubble Space Telescope imaging of the globular cluster system around NGC 5846 (1997)
Forbes, Duncan A., Brodie, Jean P., Huchra, John P.
Bimodal globular cluster metallicity distributions have now been seen in a handful of large ellipticals. Here we report the discovery of a bimodal distribution in the dominant group elliptical NGC...
Ellipticals with kinematically distinct cores: V-I color images with WFPC2 (1997)
Carollo, C. Marcella, Franx, Marijn, Illingworth, Garth D., Forbes, Duncan A.
We have analyzed Hubble Space Telescope WFPC2 F555W and F814W (i.e., V and I) images for 15 elliptical galaxies with kinematically distinct cores. For each of them, we have derived surface brightness...
Globular clusters in the Sombrero galaxy (NGC 4594) (1997)
Forbes, Duncan A., Grillmair, Carl J., Smith, R. C.
The Sombrero galaxy, NGC 4594, contains the roost numerous globular cluster system of any nearby spiral. It is an ideal candidate in which to study the globular clusters and contrast them with those...
On the origin of globular clusters in elliptical and cD galaxies (1997)
Forbes, Duncan A., Brodie, Jean P., Grillmair, Carl J.
Perhaps the most noteworthy of recent findings in extragalactic globular cluster (GC) research are the multimodal GC metallicity distributions seen in massive early-type galaxies. We explore the...
The HST Medium Deep Survey: galaxy morphology at high redshift (1996)
Griffiths, R., Ratnatunga, K. U., Casertano, S., Im, M., Neuschaefer, L. W., Ellis, R., ...
With HST and WFPC2, galaxies in the Medium Deep Survey can be reliably classified to magnitudes I-814 less than or similar to 22.0 in the F814W band, at a mean redshift (z) over bar similar to 0.5....
Ellipticals with kinematically distinct cores: WFPC2 imaging of globular clusters (1996)
Forbes, Duncan A., Franx, Marijn, Illingworth, Garth D., Carollo, C. Marcella
New globular clusters may form in the merger of two galaxies. Perhaps the best examples of merger remnants are the set of ellipticals with kinematically distinct cores. Here we present Hubble Space...
The Hubble Space Telescope's Wide Field and Planetary Camera 2 (WFPC2) has several advantages over ground-based observations for the study of globular cluster luminosity functions (GCLFs) and...
Keck spectroscopy and Hubble Space Telescope imaging of field galaxies at moderate redshift (1996)
Forbes, Duncan A., Phillips, Andrew C., Koo, David C., Illingworth, Garth D.
We present 18 spectra, obtained with the Keck 10 m telescope, of faint field galaxies (19 <I < 22, 0.2 < z < 0.84) previously imaged by the Hubble Space Telescope (HST) Wide Field and...
Redshift z~1 field galaxies observed with the Keck Telescope and the Hubble Space Telescope (1996)
Koo, David C., Vogt, Nicole P., Phillips, Andrew C., Guzman, Rafael, Wu, K. L., Faber, S. M., ...
We report results based on 35 new spectroscopic redshifts obtained with the Keck Telescope for field galaxies that also have photometry and morphology from survey images taken by the refurbished...
The turnover, or peak, magnitude in a galaxy's globular cluster luminosity function (GCLF) may provide a standard candle for an independent distance estimator. Here we examine the GCLF of the giant...
Optical rotation curves of distant field galaxies: Keck results at redshifts to z~1 (1996)
Vogt, Nicole P., Forbes, Duncan A., Phillips, Andrew C., Gronwall, Caryl, Faber, S. M., Illingworth, Garth D., ...
Spatially resolved velocity profiles are presented for nine faint field galaxies in the redshift range 0.1 ≤ z ≤ 1, based on moderate-resolution spectroscopy obtained with the Keck 10 m...
The membership of some galaxies in the nearby (d similar to 12 Mpc) Coma I cloud is uncertain. Here we present globular cluster luminosity functions (GCLFs) from the Hubble Space Telescope for two...
Griffiths, Richard, Ratnatunga, Kavan U., Neuschaefer, Lyman W., Casertano, Stefano, Im, Myungshin, Wyckoff, Eric W., ...
We present results from the Medium Deep Survey (MDS), a Key Project using the Hubble Space Telescope. Wide Field Camera images of random fields have been taken in "parallel mode" with an effective...