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
61 papers · 2 filters
Using Cepheids to determine the galactic abundance gradient I. The solar neighbourhood
S. M. Andrievsky, V. V. Kovtyukh, R. E. Luck +7
A number of studies of abundance gradients in the galactic disk have been performed in recent years. The results obtained are rather disparate: from no detectable gradient to a rat…
A Closer Look at the Soft X-ray Transient X1608-52: Long-term Optical/X-ray Observations
S. Wachter, D. W. Hoard, C. D. Bailyn +2
We report long-term simultaneous optical and (RXTE) X-ray observations of the soft X-ray transient and low mass X-ray binary X1608-52 spanning from 1999 to 2001. In addition to the…
Extended Red Emission in the "Evil Eye" Galaxy (NGC4826)
D. Pierini, A. Majeed, T. A. Boroson +1
We obtained low-resolution, long-slit 5300--9100 A spectroscopy of NGC4826 (a nearby galaxy with an absorbing dust lane (DL) asymmetrically placed across its bulge, associated with…
The KPNO International Spectroscopic Survey. III. [O III]-selected Survey List
John J. Salzer, Caryl Gronwall, Vicki L. Sarajedini +8
The KPNO International Spectroscopic Survey (KISS) is an objective-prism survey for extragalactic emission-line objects. It combines many of the features of previous slitless spect…
Spectroscopic Study of IRAS 19285+0517(PDS 100): A Rapidly Rotating Li-Rich K Giant
Bacham E. Reddy, David L. Lambert, Bruce J. Hrivnak +1
We report on photometry and high-resolution spectroscopy for IRAS 19285+0517. The spectral energy distribution based on visible and near-IR photometry and far-IR fluxes shows that…
The HI Environment of Three Superbubbles in the Large Magellanic Cloud
M. S. Oey, B. Groves, L. Staveley-Smith +1
The ambient interstellar environment of wind- and supernova-driven superbubbles strongly affects their evolution, but its properties are rarely well-determined. We have therefore o…
The WARPS Survey: VI. Galaxy Cluster and Source Identifications from Phase I
E. S. Perlman, D. J. Horner, L. R. Jones +4
We present in catalog form the optical identifications for objects from the first phase of the Wide Angle ROSAT Pointed Survey (WARPS). WARPS is a serendipitous survey of relativel…
A Study of 3CR Radio Galaxies from z = 0.15 to 0.65. I. Evidence for an Evolutionary Relationship Between Quasars and Radio Galaxies
Michael Harvanek, E. Ellingson, John T. Stocke
Deep optical images have been gathered for a nearly complete sample of radio galaxies from the Revised 3rd Cambridge (3CR) Catalog in the redshift range 0.15 < z < 0.65. Total and…
Lyman Alpha Emitters at Redshift z=5.7
James E. Rhoads, Sangeeta Malhotra
Lyman alpha galaxies at high redshifts offer a powerful probe of both the formation of galaxies and the reionization of the intergalactic medium. Lyman alpha line emission is an ef…
Tomographic Separation of Composite Spectra. VIII. The Physical Properties of the Massive Compact Binary in the Triple Star System HD 36486 (delta Orionis A)
James A. Harvin, Douglas R. Gies, William G. Bagnuolo +2
Double-lined spectroscopic orbital elements have recently been found for the central binary in the massive triple, delta Orionis A based on radial velocities from cross-correlation…
IR Detection of Low-Mass Secondaries in Spectroscopic Binaries
T. Mazeh, L. Prato, M. Simon +3
This paper outlines an infrared spectroscopic technique to measure the radial velocities of faint secondaries in known single-lined binaries. The paper presents our H-band observat…
Effective Temperatures of late L dwarfs and the onset of Methane signatures
Andreas Schweitzer, John E. Gizis, Peter H. Hauschildt +3
We present a spectral analysis of a sample of late L dwarfs. We use our latest model atmospheres and synthetic spectra and optical and K band spectra to determine effective tempera…
New X-ray Clusters in the EMSS II: Optical Properties
Aaron D. Lewis, E. Ellingson, John T. Stocke
We present optical images for 9 new clusters of galaxies we have found in a reanalysis of the Einstein IPC images comprising the Extended Medium Sensitivity Survey (EMSS). Based on…
A Photometric Study of the Young Stellar Population Throughout the lambda Orionis Star-Forming Region
Christopher J. Dolan, Robert D. Mathieu
We present VRI photometry of 320,917 stars with 11 < R < 18 throughout the lambda Orionis star-forming region. We statistically remove the field stars and identify a representative…
New X-ray Clusters in the EMSS I: Modifications to the XLF
Aaron D. Lewis, John T. Stocke, E. Ellingson +1
The complete ensemble of Einstein Imaging Proportional Counter (IPC) X-ray images has been re-processed and re-analyzed using a multi-aperture source detection algorithm. A catalog…
Spectral Components of SS 433
D. R. Gies, M. V. McSwain, R. L. Riddle +3
We present results from new optical and UV spectroscopy of the unusual binary system SS 433, and we discuss the relationship of the particular spectral components we observe to the…
Kinematic and morphological modeling of the bipolar nebula Sa2-237
Hugo E. Schwarz, Romano L. M. Corradi, Rodolfo Montez
We present [OIII]500.7nm and Halpha+[NII] images and long-slit, high resolution echelle spectra in the same spectral regions of Sa2--237, a possible bipolar planetary nebula. The i…
Rotational Velocities and Radii of Pre-Main-Sequence Stars in the Orion Nebula Cluster
K. L. Rhode, W. Herbst, R. D. Mathieu
We have obtained high-dispersion spectra for 256 pre-main-sequence stars in the Orion Nebula Cluster in order to measure their projected rotational velocities and study the rotatio…
Infrared Properties of Cataclysmic Variables from 2MASS: Results from the 2nd Incremental Data Release
D. W. Hoard, S. Wachter, L. Lee Clark +1
Because accretion-generated luminosity dominates the radiated energy of most cataclysmic variables, they have been ``traditionally'' observed primarily at short wavelengths. Infrar…
The He abundance in the metal-deficient blue compact dwarf galaxies Tol 1214-277 and Tol 65
Y. I. Izotov, F. H. Chaffee, R. F. Green
We present high-quality Keck telescope spectroscopic observations of the two metal-deficient blue compact dwarf (BCD) galaxies Tol 1214-277 and Tol 65. These data are used to deriv…
Sulfur, Chlorine, and Argon in Planetary Nebulae. IIA: Observations of a Southern Sample
J. B. Milingo, K. B. Kwitter, R. B. C. Henry +1
In this paper we present fully reduced and dereddened emission line strengths for a sample of 45 southern Type II planetary nebulae (PNe). The spectrophotometry for these PNe cover…
Sulfur, Chlorine, & Argon Abundances in Planetary Nebulae. IIB: Abundances in a Southern Sample
J. B. Milingo, R. B. C. Henry, K. B. Kwitter
We have undertaken a large spectroscopic survey of over 80 planetary nebulae with the goal of providing a homogeneous spectroscopic database between 3600-9600 Angstroms, as well as…
Population Gradients in Local Group Dwarf Spheroidals
D. Harbeck, E. K. Grebel, J. Holtzman +7
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…
The origin of the Local Bubble
Jesús Maíz-Apellániz
The Sun is located in a low-density region of the interstellar medium partially filled with hot gas that is the likely result of several nearby supernova explosions within the last…