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
45 papers · 1 filter
WFPC2 Observations of the Small Magellanic Cloud Intermediate-Age Populous Cluster NGC 416
Kenneth J. Mighell, Ata Sarajedini, Rica S. French
We present our analysis of archival Hubble Space Telescope Wide Field Planetary Camera 2 observations in F555W (~V) and F450W (~B) of the intermediate-age populous star cluster NGC…
Low-Luminosity Early-Type Galaxies in the Coma Cluster: Variations in Spectral Properties
Nelson Caldwell, James Rose
We present spectra of nine low-luminosity early-type galaxies (M_B > -17.5) in the Coma cluster. The spectra, which were obtained with the Multiple Mirror Telescope and cover the s…
The Global Schmidt Law in Star Forming Galaxies
Robert C. Kennicutt
Measurements of H-alpha, HI, and CO distributions in 61 normal spiral galaxies are combined with published far-infrared and CO observations of 36 infrared-selected starburst galaxi…
Deep HST/PC Images of a Young Radio Galaxy at z=2.390
Rogier A. Windhorst, William C. Keel, Sebastian M. Pascarelle
We present deep 63-orbit HST/PC images at ~0.06" FWHM resolution in the filters B_450, V_606 & I_814 - as well as in redshifted Lya - of the radio source LBDS 53W002, a compact nar…
Orbital Parameters for the Soft X-ray Transient 4U 1543-47: Evidence for a Black Hole
Jerome A. Orosz, Raj K. Jain, Charles D. Bailyn +2
(shortened) Spectroscopic observations of the soft X-ray transient 4U 1543-47 reveal a radial velocity curve with a period of P=1.123 +/- 0.008 days and a semi-amplitude of K_2 = 1…
New rotation periods in the Pleiades: Interpreting activity indicators
Anita Krishnamurthi, D. M. Terndrup, M. H. Pinsonneault +13
We present results of photometric monitoring campaigns of G, K and M dwarfs in the Pleiades carried out in 1994, 1995 and 1996. We have determined rotation periods for 18 stars in…
Radio-loud Active Galaxies in the Northern ROSAT All-Sky Survey III: New Spectroscopic Identifications from the RGB BL Lac Survey
S. A. Laurent-Muehleisen, R. I. Kollgaard, R. B. Ciardullo +3
We present new spectroscopic identifications for 169 objects in the RASS-Green Bank (RGB) catalog of radio- and X-ray-emitting AGN. These data significantly increase the fraction o…
Washington Photometry of the Globular Cluster System of NGC 4472. II. The Luminosity Function and Spatial Structure
Myung Gyoon Lee, Eunhyeuk Kim, Doug Geisler
We present a comprehensive study of the luminosity function and spatial structure of the globular cluster system of NGC 4472, based on deep wide field Washington CT1 CCD images. Th…
Variable Extended Objects in SA 57
Matthew A. Bershady, Dario Trevese, Richard G. Kron
We have isolated a sample of 14 candidate variable objects with extended image structure to Bj = 22.5 in 0.284 deg^2 of Selected Area 57. The majority of candidates are blue (U-B<0…
Seeking the Local Convergence Depth. II. TF Observations of the Clusters A114, A119, A194, A2295, A2457, A2806, A3193, A3381, AND A3744
Daniel A. Dale, Riccardo Giovanelli, Martha P. Haynes +3
We present Tully-Fisher (TF) observations for nine rich Abell clusters of galaxies. This is the second such data installment of an all-sky survey of 50 clusters in the redshift ran…
The ROSAT Deep Cluster Survey: the X-ray Luminosity Function out to z=0.8
P. Rosati, R. Della Ceca, C. Norman +1
We present the X-ray Luminosity Function (XLF) of the ROSAT Deep Cluster Survey (RDCS) sample over the redshift range 0.05-0.8. Our results are derived from a complete flux-limited…
Ring-Like Structure in the Radio Lobe of MG0248+0641
Samuel Conner, Asantha Cooray, Andre Fletcher +6
We present radio and optical observations of MG0248+0641, which contains a kiloparsec-scale ring-like structure in one of its radio lobes. The radio observations show a typical cor…
Optical Light Curves of the Type Ia Supernovae 1990N and 1991T
P. Lira, Nicholas B. Suntzeff, M. M. Phillips +27
We present UBVRI light curves for the bright Type Ia supernovae SN 1990N in NGC 4639 and SN 1991T in NGC 4527 based on photometry gathered in the course of the Calan/Tololo superno…
The Luminosity Function for L>L* Galaxies at z > 3
Matthew A. Bershady, Steven R. Majewski, David C. Koo +2
Through use of multiband (U, B, R, I) photometry we have isolated high redshift (3.0<z<3.5) galaxy candidates in a survey of 1.27 deg^2 to R = 21.25 and a survey of 0.02 deg^2 to R…
An Unusual Radio Galaxy in Abell 428: A Large, Powerful FR I Source in a Disk-Dominated Host
Michael J. Ledlow, Frazer N. Owen, William C. Keel
We report the discovery of a powerful (~10^{24} Watts/Hz) FR I radio source in a highly flattened disk-dominated galaxy. Half of the radio flux from this source is concentrated wit…
The WARPS survey - II: The Log(N)-Log(S) relation and the X-ray evolution of low luminosity Clusters of Galaxies
L. R. Jones, C. Scharf, H. Ebeling +4
X-ray selected surveys of clusters of galaxies can distinguish between hierarchical models of the growth of structure in the Universe. Here we present the first results from an X-r…
The Planetary Nebula Luminosity Function of M87 and the Intracluster Stars of Virgo
Robin Ciardullo, George Jacoby, John Feldmeier +1
We present the results of a wide-field [O III] survey for planetary nebulae (PN) in M87 and its surrounding halo. We show that the planetary nebula luminosity function (PNL…
The Cluster of Galaxies Surrounding Cygnus A
Frazer N. Owen, Michael J. Ledlow, Glenn E. Morrison +1
We report optical imaging and spectroscopy of 41 galaxies in a 22 arcmin square region surrounding Cygnus A. The results show that there is an extensive rich cluster associated wit…
On the Dynamical and Physical State of the `Diffuse Ionized Medium' in Nearby Spiral Galaxies
Jing Wang, Timothy M. Heckman, Matthew D. Lehnert
We have analyzed deep narrow-band H images and high-resolution long-slit spectra for a sample of the nearest and brightest late-type galaxies to study the morphology, physical s…
The Evolution of Early-Type Galaxies in Distant Clusters
S. A. Stanford, Peter R. Eisenhardt, Mark Dickinson
We present results from an optical-IR photometric study of early-type galaxies in 19 galaxy clusters out to z=0.9. The galaxy sample is selected on the basis of morphologies determ…
A New Look At Carbon Abundances In Planetary Nebulae. III. DDDM1, IC 3568, IC4593, NGC 6210, NGC 6720, NGC 6826, & NGC 7009
K. B. Kwitter, R. B. C. Henry
This paper is the third in a series reporting on a study of carbon abundances in a carefully chosen sample of planetary nebulae representing a large range in progenitor mass and me…
I ZW 18 -- a New Wolf-Rayet Galaxy
Yuri I. Izotov, Craig B. Foltz, Richard F. Green +2
We report the discovery of broad Wolf-Rayet emission lines in the Multiple Mirror Telescope (MMT) spectrum of the NW component of I Zw 18, the lowest-metallicity blue compact dwarf…
A Second UV "Light Bulb" behind the SN 1006 Remnant
P. Frank Winkler, Knox S. Long
A point X-ray source located 9 arcmin northeast of the center of SN~1006 has been spectroscopically identified as a background QSO, with a redshift of 0.335. The object is moderate…
Spectropolarimetry of FIRST BAL QSOs
M. S. Brotherton, Hien D. Tran, Wil van Breugel +2
We present Keck spectropolarimetry of two rare low-ionization broad absorption line (BAL) QSOs, FIRST J084044.5+363328 and FIRST J155633.8+351758, that also exhibit narrow absorpti…