19.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kitt Peak National ObservatoryUS401 papers
- Cerro Tololo Inter-American ObservatoryCL274 papers
- U.S. National Science FoundationUS162 papers
- Space Telescope Science InstituteUS159 papers
- California Institute of TechnologyUS116 papers
- University of ArizonaUS99 papers
- Center for Astrophysics Harvard & SmithsonianUS80 papers
- Johns Hopkins UniversityUS71 papers
- University of California, BerkeleyUS58 papers
- University of Wisconsin–MadisonUS58 papers
- Carnegie ObservatoriesUS57 papers
- Goddard Space Flight CenterUS56 papers
66 papers · 2 filters
A Deep, Wide Field, Optical, and Near Infrared Catalog of a Large Area around the Hubble Deep Field North
P. Capak, L. L. Cowie, E. M. Hu +10
We have conducted a deep multi-color imaging survey of 0.2 degrees^2 centered on the Hubble Deep Field North (HDF-N). We shall refer to this region as the Hawaii-HDF-N. Deep data w…
A Survey of Open Clusters in the u'g'r'i'z' Filter System: I. Results for NGC2548 (M48)
Cristin J. Rider, Douglas L. Tucker, J. Allyn Smith +3
We present initial results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter system. While our entire observed sam…
Infrared Spectroscopic Study of 8 Galactic Globular Clusters
Andrew W. Stephens, Jay A. Frogel
We have obtained medium-resolution infrared K band spectra of 44 giants in seven heavily reddened clusters in the Galactic bulge, as well as 12 giants in omega Centauri. We measure…
A Near-Infrared Multiplicity Survey of Class I/Flat-Spectrum Systems in Six Nearby Molecular Clouds
Karl E. Haisch, Thomas P. Greene, Mary Barsony +1
We present new near-IR observations of 76 Class I/flat-spectrum objects in the nearby (d < 320 pc) Perseus, Taurus, Chamaeleon I and II, rho Ophiuchi, and Serpens dark clouds. Thes…
Hubble Diagrams of Type Ia Supernovae in the Near Infrared
Kevin Krisciunas, Mark M. Phillips, Nicholas B. Suntzeff
From observations of 7 Type Ia supernovae obtained during the last four years at the Las Campanas and Cerro Tololo Inter-American Observatories, along with previous published data…
High Resolution mid-Infrared Imaging of SN 1987A
P. Bouchet, J. M. De Buizer, N. B. Suntzeff +4
Using the Thermal-Region Camera and Spectrograph (T-ReCS) attached to the Gemini South 8m telescope, we have detected and resolved 10 micron emission at the position of the inner e…
The Asymmetric Thick Disk: A Star Count and Kinematic Analysis. II The Kinematics
Jeniffer E. Parker, Roberta M. Humphreys, Timothy C. Beers
We report a kinematic signature associated with the observed asymmetry in the distribution of thick disk/inner halo stars interior to the Solar circle described in Paper I. In that…
A Face-On Tully-Fisher Relation
David Andersen, Matthew Bershady
We construct the first "face-on" Tully-Fisher (TF) relation for 24 galaxies with inclinations between 16 degrees and 41 degrees. The enabling measurements are integral-field, echel…
A Revised Ephemeris and FUSE Observations of the Supersoft X-ray Source CAL 83
P. C. Schmidtke, A. P. Cowley, J. B. Hutchings +2
A new ephemeris has been determined for the supersoft X-ray binary CAL 83 using MACHO photometry. With an improved orbital period of 1.047568 days, it is now possible to phase toge…
Short-Period Variable Stars in the M31 Halo
A. E. Dolphin, A. Saha, E. W. Olszewski +4
We report the findings of a new search for RR Lyraes in an M31 halo field located 40 arcminutes from the nucleus of the galaxy along the minor axis. We detected 37 variable stars,…
The Globular Cluster System of NGC 5128 II. Ages, Metallicities, Kinematics, and Formation
Eric W. Peng, Holland C. Ford, Kenneth C. Freeman
We present a study of the nearby post-merger giant elliptical galaxy, NGC 5128 (Centaurus A), in which we use the properties of its globular cluster (GC) and planetary nebula (PN)…
The Globular Cluster System of NGC 5128 I. Survey and Catalogs
Eric W. Peng, Holland C. Ford, Kenneth C. Freeman
We present the results of a photometric and spectroscopic survey of the globular cluster system of NGC 5128 (Centaurus A), a galaxy whose proximity makes it an important target for…
High-Resolution Infrared Spectroscopy of the Brown Dwarf Epsilon Indi Ba
Verne V. Smith, Takashi Tsuji, Kenneth H. Hinkle +6
We report on the analysis of high-resolution infrared spectra of the newly discovered brown dwarf Epsilon Indi Ba. This is the closest known brown dwarf to the solar system, with a…
The Planetary Nebula System and Dynamics in the Outer Halo of NGC 5128
Eric W. Peng, Holland C. Ford, Kenneth C. Freeman
The halos of elliptical galaxies are faint and difficult to explore, but they contain vital clues to both structure and formation. We present the results of an imaging and spectros…
A Galactic O-Star Catalog
J. Maíz-Apellániz, N. R. Walborn, H. Á. Galué +1
We have produced a catalog of 378 Galactic O stars with accurate spectral classifications which is complete for V<8 but includes many fainter stars. The catalog provides cross-iden…
uvbyHbeta CCD Photometry of Clusters. IV. Solving the Riddle of NGC 3680
B. J. Anthony-Twarog, B. A. Twarog
CCD photometry on the uvbyCaHbeta system is presented for the open cluster, NGC 3680. Restricting the data to probable cluster members using the CMD and the photometric indices alo…
CCD Photometry of the Globular Cluster omega Centauri. II. Stellar Populations and Age-Metallicity Relation
S. -C. Rey, Y. -W. Lee, C. Ree +3
We present wide-field and high-precision BV and Ca & Stromgren by photometry of omega Centauri, which represents one of the most extensive photometric surveys to date for this clus…
Image-Subtraction Photometry of the Globular Cluster M3: identification of new double-mode RR Lyrae stars
G. Clementini, T. M. Corwin, B. W. Carney +1
We have applied the image subtraction method to the M3 dataset previously analyzed by Corwin & Carney (2001; CC01). The new analysis produced light curves and periods for 15 variab…
Systematic effects and a new determination of the primordial abundance of 4He and dY/dZ from observations of blue compact galaxies
Y. I. Izotov, T. X. Thuan
We use spectroscopic observations of a sample of 82 HII regions in 76 blue compact galaxies to determine the primordial helium abundance Yp and the slope dY/dZ from the Y-O/H linea…
An Intriguing X-ray Arc Surrounding the X-ray Source RX J053335-6854.9 toward the Large Magellanic Cloud
J. D. Lowry, Y. -H. Chu, M. A. Guerrero +3
ROSAT observations of the Large Magellanic Cloud (LMC) have revealed a large diffuse X-ray arc around the point source RX J053335-6854.9. The relative locations of the diffuse and…
The Globular Cluster Systems of the Early-type Galaxies NGC3379, NGC4406, and NGC4594 and Implications for Galaxy Formation
K. L. Rhode, S. E. Zepf
We have investigated the global properties of the globular cluster (GC) systems of three early-type galaxies: the Virgo elliptical NGC4406, the field elliptical NGC3379, and the fi…
The X-ray Properties of Nearby Abell Clusters from the ROSAT All-Sky Survey: The Sample and Correlations with Optical Properties
Michael J. Ledlow, Wolfgang Voges, Frazer N. Owen +1
We present an analysis of the X-ray emission for a complete sample of 288 Abell clusters spanning the redshift range 0.016<= z <= 0.09 from the ROSAT All-Sky Survey. This sample is…
New Quasars Detected via Variability in the QUEST1 Survey
A. W. Rengstorf, S. L. Mufson, C. Abad +31
By observing the high galactic latitude equatorial sky in drift scan mode with the QUEST (QUasar Equatorial Survey Team) Phase 1 camera, multi-bandpass photometry on a large strip…
The Canada-France Deep Fields III: Photometric Redshift Distribution to I(AB) ~ 24
M. Brodwin, S. J. Lilly, C. Porciani +5
We compute accurate redshift distributions to I(AB) = 24 and R(AB) = 24.5 using photometric redshifts estimated from six-band UBVRIZ photometry in the Canada-France Deep Fields-Pho…