Minniti, D., Lucas, P.W., Emerson, J.P., Saito, R.K., Hempel, M., Pietrukowicz, P., ...
We describe the public ESO near-IR variability survey (VVV) scanning the Milky Way bulge and an adjacent section of the mid-plane where star formation activity is high. The survey will take 1929 h of...
Sharma, Saurabh, Borissova, J., Kurtev, R., Ivanov, V. D., Geisler, D.
In this paper, we discuss the properties of CMDs, age, metallicity and radial velocities of eight massive LMC clusters using data taken from FORS2 multiobject spectrograph at the 8.2-meter VLT/UT1....
Minniti, D., Lucas, P. W., Emerson, J. P., Saito, R. K., Hempel, M., Pietrukowicz, P., ...
We describe the public ESO near-IR variability survey (VVV) scanning the Milky Way bulge and an adjacent section of the mid-plane where star formation activity is high. The survey will take 1929...
Parisi, M. C., Geisler, D., Grocholski, A. J., Claria, J. J., Sarajedini, A.
We have obtained metallicities of ~ 360 red giant stars distributed in 15 Small Magellanic Cloud (SMC) fields from near-infrared spectra covering the CaII triplet lines using the VLT + FORS2. The...
VISTA Milky Way Public Survey (2009)
Minniti, D., Lucas, P., Ahumada, A. V., Zoccali, M., Catelan, M., Morelli, L., ...
We propose a public IR variability survey, named ``Vista Variables in the VÃa Láctea'' (VVV), of the Milky Way bulge and an adjacent section of the mid-plane where star formation activity is...
Metallicity and kinematics of a large sample of LMC and SMC clusters (2009)
Grocholski, AJ, Parisi, MC, Geisler, D, Sarajedini, A, Cole, AA
Frinchaboy, P. M., Marino, A. F., Villanova, S., Carraro, G., Majewski, S. R., Geisler, D.
We present new abundances and radial velocities for stars in the field of the open cluster Tombaugh 2, which has been suggested to be associated with the Galactic Anticenter Stellar Structure (also...
Parisi, M. C., Grocholski, A. J., Geisler, D., Sarajedini, A., Claria, J. J.
We have obtained near-infrared spectra covering the Ca II triplet lines for a number of stars associated with 16 SMC clusters using the VLT + FORS2. These data compose the largest available sample of...
The young Galactic star cluster [DBS2003]179 (2008)
Borissova, J., Ivanov, V. D., Hanson, M. M., Georgiev, L., Minniti, D., Kurtev, R., ...
Recent near- and mid-infrared surveys have brought evidence that the Milky Way continues to form massive clusters. We carry out a program to determine the basic physical properties of the new massive...
RevMexAA (Serie de Conferencias), 14, 38--38 (2002) (2007)
The Mass Profile, B. Dirsch, T. Richtler, D. Geisler, K. Gebhardt, L. Infante, ...
trast to former studies that used much smaller velocity samples (Kissler-Patig et al. 1999). Moreover, we found that the metal-rich and the metal1 Universidad de Concepci'on, Casilla 160-C,...
RevMexAA (Serie de Conferencias), 14, 38--38 (2002) (2007)
The Mass Profile, B. Dirsch, T. Richtler, D. Geisler, K. Gebhardt, L. Infante, ...
st to former studies that used much smaller velocity samples (Kissler-Patig et al. 1999). Moreover, we found that the metal-rich and the metal1 Universidad de Concepcion, Casilla 160-C, Concepcion,...
A Quantitative Link Between Globular Clusters and the Stellar Halos in Elliptical Galaxies (2007)
Forte, J. C., Faifer, F. R., Geisler, D.
This paper explores the quantitative connection between globular clusters and the diffuse stellar population of the galaxies they are associated with. Both NGC 1399 and NGC 4486 (M87) are well suited...
Spectroscopic Study of the Globular Clusters in M31 (2007)
A. Sarajedini, D. Geisler, H. S. Hwang, H. S. Park, J. C. Seguel, M. G. Lee, ...
We have performed a new systematic globular cluster (GC) survey of M31 for 3 3 area centered on M31. Using photometric data obtained from observations using the KPNO 0.9-m telescope + Washington CMT1...
The star formation history of M33´s outer regions (2007)
A. Sarajedini, D. Geisler, M. K. Barker, P. Harding, P. Schommer
The stellar populations of a galaxy are a fossil record of its formation and evolution and the various physical processes involved.
Grocholski, A. J., Cole, A. A., Sarajedini, A., Geisler, D., Smith, V. V.
Abridged Abstract - Utilizing the FORS2 instrument on the VLT, we have obtained near infrared spectra for more than 200 stars in 28 populous LMC clusters. This cluster sample spans a large range of...
Borissova, J., Ivanov, V. D., Minniti, D., Geisler, D.
Massive clusters are more often found in actively star forming galaxies than in quiescent ones, similar to the Milky Way. We have carried out an extensive survey of obscured Milky Way clusters to...
Globular Clusters at the Centre of the Fornax Cluster: Tracing Interactions Between Galaxies (2006)
Bassino, L. P., Richtler, T., Faifer, F. R., Forte, J. C., Dirsch, B., Geisler, D., ...
We present the combined results of two investigations: a large-scale study of the globular cluster system (GCS) around NGC 1399, the central galaxy of the Fornax cluster, and a study of the GCSs...
Large-scale study of the NGC 1399 globular cluster system in Fornax (2006)
Bassino, L. P., Faifer, F. R., Forte, J. C., Dirsch, B., Richtler, T., Geisler, D., ...
We present a Washington C and Kron-Cousins R photometric study of the globular cluster system of NGC 1399, the central galaxy of the Fornax cluster. A large areal coverage of 1 square degree around...
Gomez, M., Geisler, D., Harris, W. E., Richtler, T., Harris, G. L. H., Woodley, K.
We have investigated a number of globular cluster candidates from a recent wide-field study by Harris et al. (2004a) of the giant elliptical galaxy NGC 5128. We used the Magellan I telescope + MagIC...
Cepheid variables in the LMC cluster NGC 1866. I. New BVRI CCD photometry (2005)
Gieren, W. P., Gomez, M., Storm, J., Moffett, T. J., Infante, L., Barnes III, T. G., ...
We report BV(RI)c CCD photometric data for a group of seven Cepheid variables in the young, rich cluster NGC 1866 in the Large Magellanic Cloud. The photometry was obtained as part of a program to...
The intermediate-age open clusters Ruprecht 61, Czernik 32, NGC 2225 and NGC 2262 (2005)
Carraro, G., Baume, G., Vazquez, R., Moitinho, A., Geisler, D.
We present the first $BVI$ CCD photometry to $V=22.0$ of 4 fields centered on the region of the southern Galactic star clusters Ruprecht~61, Czernik~32, NGC 2225 and NGC 2262 and of 4 displaced...
A photometric study of the old open clusters Berkeley 73, Berkeley 75 and Berkeley 25 (2005)
Carraro, G., Geisler, D., Moitinho, A., Baume, G., Vazquez, R.
CCD BVI photometry of the faint open clusters Berkeley~73, Berkeley~75 and Berkeley~25 are presented. The two latter are previously unstudied clusters to our knowledge. While Berkeley~73 is found to...
Extragalactic Globular Clusters in the Near-Infrared: V. IC 4051 and NGC 3311 (2005)
Hempel, M., Geisler, D., Hoard, D. W., Harris, W. E.
We present the results of combined optical and near-infrared photometry for the globular cluster systems of the giant ellipticals IC 4051 and NGC 3311. We use the reduced age-metallicity degeneracy...
Majewski, S. R., Frinchaboy, P. M., Kunkel, W. E., Link, R., Munoz, R. R., Ostheimer, J. C., ...
The question of the existence of active tidal disruption around various dSph galaxies remains controversial. That debate often centers on the nature (bound vs. unbound) of extended populations of...
Photometric observations of Grid Giant Star Survey candidates (2005)
Bizyaev, D., Smith, V. V., Arenas, J., Geisler, D.
We compare variability of radial velocity (RV) and brightness for a sample of red giants which were selected as candidates for the Grid Giant Star Survey (GGSS). The purpose of the survey is to...
Borissova, J., Ivanov, V. D., Minniti, D., Geisler, D., Stephens, A. W.
This paper is part of a project to search the inner Milky Way for hidden massive clusters and to address the question of whether our Galaxy still forms clusters similar to the progenitors of the...
The Globular Cluster System of NGC 1399: III. VLT Spectroscopy and Database (2004)
Dirsch, B., Richtler, T., Geisler, D., Gebhardt, K., Hilker, M., Alonso, M. V., ...
Radial velocities of 468 globular clusters around NGC 1399, the central galaxy in the Fornax cluster, have been obtained with FORS2 and the Mask Exchange Unit (MXU) at the ESO Very Large Telescope....
Richtler, T., Dirsch, B., Gebhardt, K., Geisler, D., Hilker, M., Alonso, M. V., ...
We study the kinematics and dynamics of the globular cluster system of NGC 1399, the central galaxy of the Fornax cluster. The observational data consists of medium resolution spectra, obtained at...
The globular cluster system of NGC 1399. III. VLT spectroscopy and database (2004)
Dirsch, B., Richtler, T., Geisler, D., Gebhardt, K., Hilker, M., Alonso, M. V., ...
Radial velocities of 468 globular clusters around NGC 1399, the central galaxy in the Fornax cluster, have been obtained with FORS2 and the Mask Exchange Unit (MXU) at the ESO Very Large Telescope....
Tidal dwarfs in the M81 group: the second generation? (2003)
Makarova, L., Grebel, E., Karachentsev, I., Dolphin, A., Karachentseva, V., Sharina, M., ...
We present a quantitative star formation history derivationof the foursuspected tidal dwarf galaxies in the M 81 group: Holmberg IX, BK3N,Arp-loop (A0952+69) and Garland using HST/WFPC2 images of...
Distances to Nearby Galaxies in Sculptor (2003)
Karachentsev, I. D., Grebel, E. K., Sharina, M. E., Dolphin, A. E., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a...
Distances to nearby galaxies in sculptor (2003)
Karachentsev, I.D., Grebel, E.K., Sharina, M.E., Dolphin, A.E., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a...
Local galaxy flows within 5 Mpc (2003)
Karachentsev, I.D., Makarov, D.I., Sharina, M.E., Dolphin, A.E., Grebel, E.K., Geisler, D., ...
Galaxy flow in the Canes Venatici I cloud (2003)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of eighteen galaxies in the Canes Venatici I cloud. We derive their distances from the luminosity of the tip of the red giant branch...
Tidal dwarfs in the M81 group: The second generation? (2003)
Makarova, L., Grebel, E.K., Karachentsev, I.D., Dolphin, A.E., Karachentseva, V.E., Sharina, M.E., ...
Local galaxy flows within 5 Mpc (2002)
Karachentsev, I. D., Makarov, D. I., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates. We derive their distances from the luminosity of the tip of the...
Galaxy Flow in the Canes Venatici I Cloud (2002)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of eighteen galaxies in the Canes Venatici I cloud. We derive their distances from the luminosity of the tip of the red giant branch...
Tidal dwarfs in the M81 group: the second generation? (2002)
Makarova, L. N., Grebel, E. K., Karachentsev, I. D., Dolphin, A. E., Karachentseva, V. E., Sharina, M. E., ...
We derive quantitative star formation histories of the four suspected tidal dwarf galaxies in the M81 group, HolmbergIX, BK3N, Arp-loop (A0952+69), and Garland, using Hubble Space Telescope/Wide...
Kundu, A., Majewski, S. R., Rhee, J., Rocha-Pinto, H. J., Polak, A. A., Slesnick, C. L., ...
We describe first results of a spectroscopic probe of selected fields from the Grid Giant Star Survey. Multifiber spectroscopy of several hundred stars in a strip of eleven fields along delta...
The very local Hubble flow (2002)
Karachentsev, I. D., Sharina, M. E., Makarov, D. I., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
We present Hubble Space Telescope/WFPC2 images of eighteen galaxies situated in the vicinity of the Local Group (LG) as part of an ongoing snapshot survey of nearby galaxies. Their distances derived...
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy (2002)
Sarajedini, A., Grebel, E. K., Dolphin, A. E., Seitzer, P., Geisler, D., Guhathakurta, P., ...
The M 81 group of galaxies: New distances, kinematics and structure (2002)
Karachentsev, I. D., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., Hodge, P. W., ...
New distances to galaxies in the Centaurus A group (2002)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
The very local Hubble flow (2002)
Karachentsev, I. D., Sharina, M. E., Makarov, D. I., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy (2001)
Sarajedini, A., Grebel, E. K., Dolphin, A. E., Seitzer, P., Geisler, D., Guhathakurta, P., ...
We present Hubble Space Telescope Wide Field Planetary Camera 2 photometry in the V and I passbands of the recently discovered Local Group dwarf spheroidal galaxy in Cetus. Our color-magnitude...
A new galaxy near the Local Group in Draco (2001)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., ...
We present HST WFPC2 and ground-based images of the low surface brightness dwarf Irr/Sph galaxy KKR~25 in Draco. Its colour-magnitude diagram shows red giant branch stars with the tip at I = 22.32...
The Outer Halo Cluster System of NGC 1399 (2001)
Dirsch, B., Geisler, D., Richtler, T., Forte, J. C.
We investigate the outer halo globular cluster population of NGC 1399. This study uses wide-field imaging of this cluster system, which covers the largest area studied with CCD photometry until now....
Population Gradients in Local Group Dwarf Spheroidals (2001)
Harbeck, D., Grebel, E. K., Holtzman, J., Guhathakurta, P., Brandner, W., Geisler, D., ...
We present a systematic and homogeneous analysis of population gradients for the Local Group dwarf spheroidals (dSphs) Carina, Sculptor, Sextans, Tucana, Andromeda I-III, V, and VI. For all of the...
Spectroscopy of Globular Clusters in NGC 1399 - A Progress Report (2001)
Richtler, T., Dirsch, B., Geisler, D., Gebhardt, K., Hilker, M., Infante, L., ...
We performed spectroscopy of globular clusters associated with NGC 1399 and measured radial velocities of more than 400 clusters, the largest sample ever obtained for dynamical studies. In this...
WFPC2 Observations of Two dSph Galaxies in the M81 Group (2001)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Hodge, P. W., ...
We have obtained HST WFPC2 and ground-based images of two low surface brightness dwarf spheroidal galaxies in the M81 group, FM1 and KKH57. Their colour-magnitude diagrams show red giant branches...
Piatti, A. E., Santos Jr., J. F. C., Claria, J. J., Bica, E., Sarajedini, A., Geisler, D.
Colour-magnitude diagrams are presented for the first time for L32, L38, K28 (L43), K44 (L68) and L116, which are clusters projected onto the outer parts of the Small Magellanic Cloud (SMC). The...
The Stellar Content and Distance of UGC 4483 (2000)
Dolphin, A. E., Makarova, L., Karachentsev, I. D., Karachentseva, V. E., Geisler, D., Grebel, E. K., ...
We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V ~ 26.0 and I ~ 24.7. We measure...
Dwarf Spheroidal Galaxies in the M81 Group Imaged with WFPC2 (2000)
Karachentsev, I. D., Karachentseva, V. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., ...
We obtained HST/WFPC2 images of the dwarf spheroidal (dSph) galaxies K61, K63, K64, DDO78, BK6N, and kk77 in the M81 group. Our color-magnitude diagrams show red giant branches with tips (TRGB)...
Ages and Metallicities of Globular Clusters in NGC 4472 (2000)
Beasley, M. A., Sharples, R. M., Bridges, T. J., Hanes, D. A., Zepf, S. E., Ashman, K. M., ...
We have derived ages and metallicities from co-added spectra of 131 globular clusters associated with the giant elliptical galaxy NGC 4472. Based upon a calibration with Galactic globular clusters,...
A Dwarf Galaxy Survey in the Local Volume (2000)
Grebel, E. K., Seitzer, P., Dolphin, A. E., Geisler, D., Guhathakurta, P., Hodge, P. W., ...
We are carrying out a comprehensive multi-wavelength study of dwarf galaxies in the Local Volume (< 5 Mpc). After our all-sky survey more than doubled the dwarf census we are now measuring structural...
Cepheid variables in the LMC cluster NGC 1866. I. New BVRI CCD photometry (2000)
Gieren, W. P., Gomez, M., Storm, J., Moffett, T. J., Infante, L., Barnes III, T. G., ...
We report BV(RI)c CCD photometric data for a group of seven Cepheid variables in the young, rich cluster NGC 1866 in the Large Magellanic Cloud. The photometry was obtained as part of a program to...
Cepheid variables in the LMC cluster NGC 1866. I. New BVRI CCD photometry (2000)
Gieren, W. P., Gomez, M., Storm, J., Moffett, T. J., Infante, L., Barnes III, T. G., ...
We report BV(RI)c CCD photometric data for a group of seven Cepheid variables in the young, rich cluster NGC 1866 in the Large Magellanic Cloud. The photometry was obtained as part of a program to...
Cepheid variables in the LMC cluster NGC 1866. I. New BVRI CCD photometry (2000)
Gieren, W. P., Gomez, M., Storm, J., Moffett, T. J., Infante, L., Barnes III, T. G., ...
We report BV(RI)c CCD photometric data for a group of seven Cepheid variables in the young, rich cluster NGC 1866 in the Large Magellanic Cloud. The photometry was obtained as part of a program to...
Majewski, S. R., Ostheimer, J. C., Patterson, R. J., Kunkel, W. E., Johnston, K. V., Geisler, D.
As part of our survey for substructure in the Milky Way halo as traced by giant stars, and to look for tidal stellar debris in the halo viable for measurement of the Galactic mass potential with SIM,...
The dwarf spheroidal galaxy DDO 44: stellar populations and distance (1999)
Karachentsev, I. D., Sharina, M. E., Grebel, E. K., Dolphin, A. E., Geisler, D., Guhathakurta, P., ...
We present ground-based and HST WFPC2 imaging of the nearby low surface brightness dwarf spheroidal galaxy DDO 44. For the first time DDO 44 was resolved into stars. The resulting color-magnitude...
A New Giant Branch Clump Structure In the Large Magellanic Cloud (1999)
Piatti, A. E., Geisler, D., Bica, E., Claria, J. J., Santos Jr., J. F. C., Sarajedini, A., ...
We present Washington C, T1 CCD photometry of 21 fields located in the northern part of the Large Magellanic Cloud (LMC), and spread over a region of more than 2.52 degrees approximately 6 degrees...
Santos Jr., J. F. C., Piatti, A. E., Claria, J. J., Bica, E., Geisler, D., Dottori, H.
A comparative analysis of Washington color-magnitude diagrams (CMDs) for 14 star clusters and respective surrounding fields in the Large Magellanic Cloud (LMC) outer disk is presented. Each CCD frame...
Standard Giant Branches in the Washington Photometric System (1998)
We have obtained CCD photometry in the Washington system C,T1 filters for some 850,000 objects associated with 10 Galactic globular clusters and 2 old open clusters. These clusters have well-known...
Spectroscopy of Globular Clusters in NGC 4472 (1998)
Sharples, R. M., Zepf, S. E., Bridges, T. J., Hanes, D. A., Carter, D., Ashman, K. M., ...
Optical multi-slit spectra have been obtained for 47 globular clusters surrounding the brightest Virgo elliptical NGC 4472 (M49). Including data from the literature, we analyze velocities for a total...
The Globular Cluster Systems of NGC 1400 and NGC 1407 (1996)
Perrett, K. M., Hanes, D. A., Butterworth, S. T., Kavelaars, JJ, Geisler, D., Harris, W. E.
The two brightest elliptical galaxies in the Eridanus A group, NGC 1400 and NGC 1407, have been observed in both the Washington T_1 and Kron-Cousins I filters to obtain photometry of their globular...
Hanania, EG, Kavanagh, J, Giles, RE, Kudelka, A, Rahman, Z, Holmes, F, ...
The Richness of the Globular Cluster System of NGC 3923: Clues to Elliptical Galaxy Formation (1994)
Zepf, S. E., Geisler, D., Ashman, K. M.
We present new data on the globular cluster system of the elliptical galaxy NGC 3923 which show that it has the most globular clusters per unit luminosity of any non-cluster elliptical yet observed,...