The Distance to NGC 5128 (Centaurus A) (2009)
Harris, Gretchen L. H., Rejkuba, Marina, Harris, William E.
In this paper we review the various high precision methods that are now available to determine the distance to NGC 5128. These methods include: Cepheids, TRGB (tip of the red giant branch), PNLF...
Massive star clusters in galaxies (2009)
The ensemble of all star clusters in a galaxy constitutes its star cluster system. In this review, the focus of the discussion is on the ability of star clusters, particularly the systems of old...
Woodley, Kristin A., Harris, William E., Puzia, Thomas H., Gomez, Matias, Harris, Gretchen L. H., Geisler, Doug
We present new integrated light spectroscopy of globular clusters (GCs) in NGC 5128 in order to measure radial velocities and derive ages, metallicities, and alpha-element abundance ratios. Using...
The remnants of galaxy formation from a panoramic survey of the region around M31 (2009)
McConnachie, Alan W., Irwin, Michael J., Ibata, Rodrigo A., Dubinski, John, Widrow, Lawrence M., Martin, Nicolas F., ...
In hierarchical cosmological models, galaxies grow in mass through the continual accretion of smaller ones. The tidal disruption of these systems is expected to result in loosely bound stars...
Structural Parameters of the M87 Globular Clusters (2009)
Madrid, Juan P., Harris, William E., Blakeslee, John P., Gomez, Matias
We derive structural parameters for ~2000 globular clusters in the giant Virgo elliptical M87 using extremely deep Hubble Space Telescope images in F606W (V) and F814W (I) taken with the ACS/WFC. The...
The Globular Cluster System in M87: A Wide-Field Study with CFHT/Megacam (2009)
CFHT Megacam data in (g',r',i') are used to obtain deep, wide-field photometry of the globular cluster system (GCS) around M87. A total of 6200 GCs brighter than M_I = -8.5 are included in the study,...
Statistical Tools for Classifying Galaxy Group Dynamics (2009)
Hou, Annie, Parker, Laura C., Harris, William E., Wilman, David J.
The dynamical state of galaxy groups at intermediate redshifts can provide information about the growth of structure in the universe. We examine three goodness-of-fit tests, the Anderson--Darling...
Peng, Eric W., Jordan, Andres, Blakeslee, John P., Mieske, Steffen, Cote, Patrick, Ferrarese, Laura, ...
Metal-poor globular clusters (GCs) are our local link to the earliest epochs of star formation and galaxy building. Studies of extragalactic GC systems using deep, high-quality imaging have revealed...
Cockcroft, Robert, Harris, William E., Wehner, Elizabeth M. H., Whitmore, Bradley C., Rothberg, Barry
We combine the globular cluster data for fifteen Brightest Cluster Galaxies and use this material to trace the mass-metallicity relations (MMR) in their globular cluster systems (GCSs). This work...
Globular Cluster Systems in Giant Ellipticals: the Mass/Metallicity Relation (2009)
Hubble Space Telescope ACS/WFC data in (B,I) are used to investigate the globular cluster populations around 6 gE galaxies ~40 Mpc distant. The total comprises a sample of ~8000 high-probability...
Stochastic self-enrichment, pre-enrichment, and the formation of globular clusters (2009)
Bailin, Jeremy, Harris, William E.
We develop a model for stochastic pre-enrichment and self-enrichment in globular clusters (GCs) during their formation process. GCs beginning their formation have an initial metallicity determined by...
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...
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...
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...
Luminosity functions of LMXBs in Centaurus A: globular clusters versus the field (2009)
Voss, Rasmus, Gilfanov, Marat, Sivakoff, Gregory R., Kraft, Ralph P., Jordan, Andres, Raychaudhury, Somak, ...
Statistical tools for classifying galaxy group dynamics (2009)
Hou, Annie, Parker, Laura C., Harris, William E., Wilman, David J.
Inclination-Independent Galaxy Classification (2008)
Bailin, Jeremy, Harris, William E.
We present a new method to classify galaxies from large surveys like the Sloan Digital Sky Survey using inclination-corrected concentration, inclination-corrected location on the color-magnitude...
Beasley, Michael, Bridges, Terry, Peng, Eric, Harris, William E., Harris, Gretchen L. H., Forbes, Duncan A., ...
We have performed a spectroscopic study of globular clusters (GCs) in the giant elliptical NGC 5128 using the 2dF facility at the Anglo-Australian telescope. We obtained integrated optical spectra...
A Transient Black-Hole Low-Mass X-Ray Binary Candidate in Centaurus A (2008)
Sivakoff, Gregory R., Kraft, Ralph P., Jordán, Andrés, Juett, Adrienne M., Evans, Daniel A., Forman, William R., ...
We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, towards Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March--May. Between 2003...
Galaxy Concentrations are Trimodal (2008)
Bailin, Jeremy, Harris, William E.
We have analysed the distribution of inclination-corrected galaxy concentrations in the Sloan Digital Sky Survey. We find that unlike most galaxy properties, which are distributed bimodally, the...
Globular Clusters and X-ray Point Sources in Centaurus A (NGC 5128) (2008)
Woodley, Kristin A., Raychaudhury, Somak, Kraft, Ralph P., Harris, William E., Jordan, Andres, Whitaker, Katherine E., ...
We detect 353 X-ray point sources, mostly low-mass X-ray binaries (LMXBs), in four Chandra observations of Centaurus A (NGC 5128), the nearest giant early-type galaxy, and correlate this point source...
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...
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...
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...
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...
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...
Photometry And Spectroscopy Of Coma Dwarf Ellipticals (2007)
Jeff Secker, William E. Harris, J. B. Oke
ies to have (on average) a bluer color: \Delta(B \GammaR)=\DeltaR = \Gamma0:056\Sigma0:002. Fainter than R ' 18:5 mag, the dE sequence spreads and merges with the multitude of noncluster...
William E. Harris, Stephen T. Holland, Dean E. Mclaughlin
We present new imaging measurements of 27 individual globular clusters in the halo of the nearby elliptical galaxy NGC 5128, obtained with the Hubble Space Telescope STIS and WFPC2 cameras. We use...
On the Formation of Galaxy Halos: Comparing NGC 5128 and the Local Group Members (2007)
The metallicity distribution function (MDF) for the old red-giant stars in the halo of NGC 5128, the nearest giant elliptical galaxy, is virtually identical with the MDF for the old-disk stars in the...
McLaughlin, Dean E., Barmby, Pauline, Harris, William E., Forbes, Duncan A., Harris, Gretchen L. H.
We present internal surface-brightness profiles, based on HST/ACS imaging in the F606W bandpass, for 131 globular cluster (GC) candidates with luminosities 10^4 - 3 x 10^6 solar, in the giant...
Low-Mass X-ray Binaries and Globular Clusters in Centaurus A (2007)
Jordan, Andres, Sivakoff, Gregory R., McLaughlin, Dean E., Blakeslee, John P., Evans, Daniel A., Kraft, Ralph P., ...
We present results of Hubble Space Telescope and Chandra X-ray Observatory observations of globular clusters (GCs) and low-mass X-ray binaries (LMXBs) in the central regions of Centaurus A. Out of...
Wide-Field Survey of Globular Clusters in M31. II. Kinematics of the Globular Cluster System (2007)
Lee, Myung Gyoon, Hwang, Ho Seong, Kim, Sang Chul, Park, Hong Soo, Geisler, Doug, Sarajedini, Ata, ...
We present a kinematic analysis of the globular cluster(GC) system in M31. Using the photometric and spectroscopic database of 504 GCs, we have investigated the kinematics of the M31 GC system. We...
Wide-Field Survey of Globular Clusters in M31. I. A Catalog of New Clusters (2007)
Kim, Sang Chul, Lee, Myung Gyoon, Geisler, Doug, Sarajedini, Ata, Park, Hong Soo, Hwang, Ho Seong, ...
We present the result of a wide-field survey of globular clusters (GCs) in M31 covering a 3deg x 3deg field c. We have searched for GCs on CCD images taken with Washington CMT1 filters at the KPNO...
The Kinematics and Dynamics of the Globular Clusters and the 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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
Structural Parameters for Globular Clusters in NGC 5128. II: HST/ACS Imaging and New Clusters (2006)
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan
We report the first results from an imaging program with the ACS camera on HST designed to measure the structural characteristics of a wide range of globular clusters in NGC 5128, the nearest giant...
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan A.
Abstract not available.
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan A.
Abstract not available.
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan A.
Abstract not available.
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan A.
Abstract not available.
Harris, William E., Harris, Gretchen L. H., Barmby, Pauline, McLaughlin, Dean E., Forbes, Duncan A.
Abstract not available.
The faint end of the luminosity function in the core of the coma cluster (2006)
Milne, Margaret L., Pritchet, Christopher J., Poole, Gregory B., Gwyn, Stephen D. J., Kavelaars, J. J., Harris, William E., ...
We present optical measurements of the faint end of the luminosity function in the core of the Coma Cluster. Dwarf galaxies are detected down to a limiting magnitude of R ~ 25.75 in images taken with...
Two Populations of Young Massive Star Clusters in Arp 220 (2005)
Wilson, Christine D., Harris, William E., Longden, Rebecca, Scoville, N. Z.
We present new optical observations of young massive star clusters in Arp 220, the nearest ultraluminous infrared galaxy, taken in UBVI with the Hubble Space Telescope ACS/HRC camera. We find a total...
Radial Velocities of Newly Discovered Globular Clusters in NGC 5128 (2005)
Woodley, Kristin A., Harris, William E., Harris, Gretchen L. H.
We present radial velocity measurements for 74 globular clusters (GCs) in the nearby giant elliptical NGC 5128, of which 31 are newly discovered clusters. All the GC candidates were taken from the...
The Metallicity Distribution in the Outer Halo of M33 (2004)
Brooks, R. Scott, Wilson, Christine D., Harris, William E.
We present the results of deep I and V-band photometry of the halo stars near the southeast minor axis of the Local Group spiral galaxy M33. An (I,V-I) color-magnitude diagram distinctly reveals the...
Photometry and the Metallicity Distribution of the Outer Halo of M31. II. The 30 Kpc Field (2004)
Durrell, Patrick R., Harris, William E., Pritchet, Christopher J.
We present the results of a wide-field (V,I) photometric study of the red-giant branch (RGB) stars in the outer halo of M31, in a field located 30 to 35 kpc from the center of the galaxy along the...
A Two-Phase Chemical Enrichment Model for the Milky Way Globular Cluster System (2003)
VanDalfsen, Marcel L., Harris, William E.
Many globular cluster systems have a distinct bimodal metallicity distribution function (MDF) which has strikingly similar features in many large galaxies of all types. By using the Milky Way cluster...
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.
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.
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.
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.
Doug Geisler, William E. Harris, Brian P. Schmidt, James E. Hesser, Mike Reid, ...
To investigate the global properties of the globular cluster system (GCS) around NGC 5128, the central giant elliptical galaxy in the nearby Centaurus group, we have obtained deep CCD imaging for an...
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.
Origin of the metallicity distribution of the NGC 5128 stellar halo (2002)
Bekki, Kenji, Harris, William E., Harris, Gretchen L. H.
Recent {\it Hubble Space Telescope} photometry in the nearby elliptical galaxy NGC 5128 shows that its halo field star population is dominated by moderately metal-rich stars, with a peak at [m/H]...
Simultaneous Modelling of the Stellar Halo and Globular Cluster System of NGC 5128 (2002)
Beasley, Michael A., Harris, William E., Harris, Gretchen L. H., Forbes, Duncan A.
An important test for models of galaxy formation lies in the metallicity distribution functions (MDFs) of spheroid stars and their globular clusters (GCs).We have compared the MDFs obtained from...
Globular Cluster Systems in Four BCGs: A262, A3560, A3565 and A3742 (2001)
Okon, Waldemar M., Harris, William E.
We have used deep I-band (F814W) images from the HST archive to study the globular cluster systems around the brightest cluster galaxies (BCGs) in Abell 262, 3560, 3565 and 3742. Three of these BCGs...
Washington Photometry of New Globular Clusters in M31 (2001)
Kim, Sang Chul, Lee, Myung Gyoon, Geisler, Doug, Seguel, Juan, Sarajedini, Ata, Harris, William E.
We present a progress report on Washington photometry of several hundred new globular cluster (GC) candidates in M31 which were recently found from our new CCD survey of GCs. Washington CMT1 filters...
Photometry and the Metallicity Distribution of the Outer Halo of M31 (2001)
Durrell, Patrick R., Harris, William E., Pritchet, Christopher J.
We have conducted a wide-field CCD-mosaic study of the resolved red-giant branch (RGB) stars of M31, in a field located 20 kpc from the nucleus along the SE minor axis. In our (I, V-I)...
The metallicity distribution in the Halo stars of NGC 5128: implications for galaxy formation (1999)
Harris, Gretchen L. H., Harris, William E., Poole, Gregory B.
We have used the Hubble Space Telescope to obtain WFPC2 V, I photometry for stars in the halo of NGC 5128, the nearest giant elliptical galaxy. The resulting color-magnitude diagram (CMD) of this...
Military Compensation and the All-Volunteer Force: Lessons Learned. (1998)
This thesis traces the development of the compensation program for the All-Volunteer Force, 1973-1993, through a 'lessons learned' approach. Eighteen lessons are highlighted in the study. The thesis...
Stetson, Peter B., Bolte, Michael, Harris, William E., Hesser, James E., Bergh, Sidney Van Den, VandenBerg, Don A., ...
We have used the WFPC2 camera on the Hubble Space Telescope to obtain photometry of the outer-halo globular clusters Palomar 3, Palomar 4, and Eridanus. These three are classic examples of the...
M87, Globular Clusters, And Galactic Winds: Issues In Giant . . . (1998)
William E. Harris, Dean E. Mclaughlin
We have used the high-resolution camera at the Canada-France-Hawaii Telescope to obtain VRIpho- tometry of the globular clusters in the innermost 140A of the M87 halo. The results are used to discuss...
A color-magnitude diagram for a globular cluster in the giant elliptical galaxy NGC 5128 (1998)
Harris, Gretchen L. H., Poole, G. B., Harris, William E.
The Hubble Space Telescope has been used to obtain WFPC2 V , I photometry for a large sample of stars in the outer halo of the giant elliptical NGC 5128 (d similar or equal to 4 Mpc). The target...
Dwarf Galaxies in the Coma Cluster. I. Detection, Measurement and Classification Techniques (1997)
Secker, Jeff, Harris, William E.
Deep B- and R-band CCD images of the central ~700 arcmin^2 of the Coma cluster core have been used to measure the dwarf-galaxy population in Coma. In this paper, we describe a newly developed code...
Dwarf Galaxies in the Coma Cluster. II. Photometry and Analysis (1997)
Secker, Jeff, Harris, William E., Plummer, Julia D.
We study the dwarf galaxy population in the central ~700 arcmin^2 of the Coma cluster, the majority of which are early-type dwarf elliptical (dE) galaxies. Analysis of the...
Photometry and Spectroscopy of Coma Dwarf Ellipticals (1997)
Secker, Jeff, Harris, William E., Cote, Pat, Oke, J. B.
We have used deep R- and B-band CCD images (with ~1.2 arcsec seeing) of the central ~700 arcmin^2 of the Coma cluster core (and an associated ~270 arcmin^2 control field) to study the early-type...
White Dwarfs in Globular Clusters: HST Observations of M4 (1997)
Richer, Harvey B., Fahlman, Gregory G., Ibata, Rodrigo A., Pryor, Carlton, Bell, Roger A., Bolte, Michael, ...
Using WFPC2 on the Hubble Space Telescope, we have isolated a sample of 258 white dwarfs (WDs) in the Galactic globular cluster M4. Fields at three radial distances from the cluster center were...
The Early-type Dwarf-to-Giant Ratio and Substructure in the Coma Cluster (1996)
Secker, Jeff, Harris, William E.
We have obtained new CCD photometry for a sample of $\simeq 800$ early-type galaxies (dwarf and giant ellipticals) in the central 700 arcmin$^2$ of the Coma cluster, complete in color and in...
Globular Clusters in NGC 1275 (1996)
Kaisler, Denise, Harris, William E., Crabtree, Dennis R., Richer, Harvey B.
We present the results of a deep photometric study of the outer halo of NGC 1275, the highly active cD galaxy at the center of the Perseus cluster. We find a modest excess of faint ($R > 22.5$)...
Age Gradient and the Second Parameter Problem in the Galactic Halo (1996)
Richer, Harvey B., Harris, William E., Fahlman, Gregory G., Bell, Roger A., Bond, Howard E., Hesser, James E., ...
We establish a framework for determing absolute ages of Galactic globular clusters and then use these ages to investigate the age-metallicity and age-Galactocentric distance relations for the 36...
Hubble Space Telescope Observations of White Dwarfs in the Globular Cluster M4 (1995)
Richer, Harvey B., Fahlman, Gregory G., Ibata, Rodrigo A., Stetson, Peter B., Bell, Roger A., Bolte, Michael, ...
With the Wide Field Planetary Camera 2 (WFPC2) on the Hubble Space Telescope, we have discovered in M4 (NGC 6121, C 1620-264) the first extensive sequence of cooling white dwarfs seen in a globular...
A $BVI$ Photometric Study of the Near-Galactic Center Globular Cluster NGC 6517 (C1759-089) (1994)
Kavelaars, JJ, Hanes, David A., Bridges, Terry J., Harris, William E.
We present the results of a $BVI$ photometric study of the globular cluster NGC 6517 using CCD images obtained at the prime focus of the CFHT. From the resultant color-magnitude diagram, we infer...
Military compensation and the all-volunteer force :--lessons learned /--by William E. Harris. (1994)
"December 1994."
Effect of Five Antibiotics in Varying Concentrations on Growth of Young Corn Plants (1953)
The products of microorganisms collectively known as antibiotics, have been investigated extensively as aids to medical sciences, but they have not been thoroughly studied for possible other uses....
"A thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science, Magna Cum Laude."