Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.6k papers
- University of California, BerkeleyUS2.5k papers
- The Ohio State UniversityUS2.3k papers
- University of ArizonaUS2.1k papers
- Lawrence Berkeley National LaboratoryUS2.1k papers
- SLAC National Accelerator LaboratoryUS2k papers
- University of California, IrvineUS2k papers
- Yale UniversityUS1.9k papers
- University of Wisconsin–MadisonUS1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.9k papers
- McGill UniversityCA1.9k papers
- University of ChicagoUS1.9k papers
108 papers · 2 filters
The Limiting Stellar Initial Mass for Black Hole Formation in Close Binary Systems
C. L. Fryer, A. Heger, N. Langer +1
We present models for the complete life and death of a 60 solar mass star evolving in a close binary system, from the main sequence phase to the formation of a compact remnant and…
The Masses of Lyman Break Galaxies
Joel R. Primack, Risa H. Wechsler, Rachel S. Somerville
Data on galaxies at high redshift, identified by the Lyman-break photometric technique, can teach us about how galaxies form and evolve. The stellar masses and other properties of…
Radio Galaxies at z = 1.1 to 3.8: Adaptive-Optics Imaging and Archival Hubble Space Telescope Data
E. Steinbring, D. Crampton, J. B. Hutchings
We have undertaken a program of high-resolution imaging of high-redshift radio galaxies (HzRGs) using adaptive optics on the Canada-France-Hawaii Telescope. We report on deep imagi…
Whatever Happened to Hot Dark Matter?
Joel R. Primack
This article summarizes the possible roles of neutrinos in cosmology, from the first three minutes onward. The fact that primordial neutrinos are about as numerous as the photons o…
Hidden star-formation in the cluster of galaxies Abell 1689
P. -A. Duc, B. Poggianti, D. Fadda. D. Elbaz +5
At a redshift of 0.18, Abell 1689 is so far the most distant cluster of galaxies for which substantial mid-infrared (MIR) data have been published. We present here the follow-up op…
Determination of masses and other properties of extra-solar planetary systems with more than one planet
Michael Nauenberg
Recent analysis of the Doppler shift oscillations of the light from extra-solar planetary systems indicate that some of these systems have more than one large planet. In this case…
Evolution and Explosion of Very Massive Primordial Stars
A. Heger, S. E. Woosley, I. Baraffe +1
While the modern stellar IMF shows a rapid decline with increasing mass, theoretical investigations suggest that very massive stars (>100 solar masses) may have been abundant in th…
Nucleosynthesis in Massive Stars With Improved Nuclear and Stellar Physics
T. Rauscher, A. Heger, R. D. Hoffman +1
We present the first calculations to follow the evolution of all stable nuclei and their radioactive progenitors in stellar models computed from the onset of central hydrogen burni…
Radial Velocities for 889 Late-type Stars
David L. Nidever, Geoffrey W. Marcy, R. Paul Butler +2
We report radial velocities for 844 FGKM-type main sequence and subgiant stars and 45 K giants, most of which had either low-precision velocity measurements or none at all. These v…
Keck Spectroscopy of Young and Old Star Clusters in NGC 1023
Soeren S. Larsen, Jean P. Brodie
We present Keck/LRIS spectra for 11 old globular clusters in the S0-type galaxy NGC 1023 and 2 young blue clusters in the nearby companion NGC 1023A. Analysis of the spectra of 7 o…
The Aquarius Superclusters - I. Identification of Clusters and Superclusters
Cesar A. Caretta, Marcio A. G. Maia, Wataru Kawasaki +1
We study the distribution of galaxies and galaxy clusters in a 10^deg x 6^deg field in the Aquarius region. In addition to 63 clusters in the literature, we have found 39 new candi…
A uniform analysis of the Lyman alpha forest at z = 0-5: III. HST FOS Spectral Atlas
Jill Bechtold, Adam Dobrzycki, Brenda Wilden +5
We analyzed the absorption line spectra of all quasars observed with the high resolution gratings of the Faint Object Spectrograph on board the Hubble Space Telescope. We examined…
The Impact of Tidal Interactions on Satellite Galaxies: A Study of the M31 Satellites, M32 & NGC 205
Philip I. Choi, Puragra Guhathakurta, Kathryn V. Johnston
Surface photometry of the M31 satellites M32 and NGC 205 is compared to numerical simulations of satellite destruction to constrain orbital parameters and the interaction history o…
Keck Spectroscopy and Imaging of Faint Galaxies Identified as MicroJansky Radio Sources
Nathan Roche, James Lowenthal, David Koo
We investigate the nature of the faintest radio sources detected in 3 VLA surveys, to faint limits 8 microJy at 8.5 GHz. Using the Keck Low Resolution Imaging Spectrograph in BRI a…
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy
A. Sarajedini, E. K. Grebel, A. E. Dolphin +7
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 col…
ISOCAM Mid-InfraRed Detection of HR 10: A Distant Clone of Arp 220 at z=1.44
David Elbaz, Hector Flores, Pierre Chanial +5
We report the detection of the extremely red object (ERO), HR 10 (I-K= 6.5, z=1.44), at 4.9 and 6.1 microns (rest-frame) with ISOCAM, the mid-infrared (MIR) camera onboard the Infr…
Age Estimates for Globular Clusters in NGC 1399
Duncan A. Forbes, Michael A. Beasley, Jean P. Brodie +1
We present high signal-to-noise Keck spectra for 10 globular clusters associated with the giant Fornax elliptical NGC 1399, and compare measured line indices with current stellar p…
Discovery of Reflection Nebulosity Around Five Vega-like Stars
Paul Kalas, James R. Graham, Steven V. W. Beckwith +2
Coronagraphic optical observations of six Vega-like stars reveal reflection nebulosities, five of which were previously unknown. The nebulosities illuminated by HD 4881, HD 23362,…
Confrontation of Intracluster and Interstellar Gas in Cluster-Centered Elliptical Galaxies: M87 in Virgo and NGC 4874 in Coma
Fabrizio Brighenti, William G. Mathews
X-ray observations of M87 in the Virgo cluster and NGC 4874 in Coma reveal that the gas temperature beyond about 50 kpc from these cD galaxies is comparable to the virial temperatu…
Concentrations and Assembly Histories of Dark Matter Halos
Risa H. Wechsler, James S. Bullock, J. R. Primack +2
We study the relation between the density profiles of dark matter halos and their mass assembly histories, using a statistical sample of halos in a high-resolution N-body simulatio…
Spectroscopy of Globular Clusters in M81
Linda L. Schroder, Jean P. Brodie, Markus Kissler-Patig +2
We present moderate-resolution spectroscopy of globular clusters (GCs) around the Sa/Sb spiral galaxy M81 (NGC 3031). Sixteen candidate clusters were observed with the Low Resoluti…
Interpreting the Morphology of Diffuse Light Around Satellite Galaxies
Kathryn V. Johnston, Philip I. Choi, Puragra Guhathakurta
Recent observations of surface brightness distributions of both Milky Way and M31 satellite galaxies have revealed many instances of sudden changes or breaks in the slope of the su…
Tidal Interaction of M32 and NGC 205 with M31: Surface Photometry and Numerical Simulations
Philip I. Choi, Puragra Guhathakurta, Kathryn V. Johnston
We investigate the interaction history of the M31 sub-group of galaxies by comparing surface photometry of its two nearest satellites, M32 and NGC 205, with N-body simulations of s…
Precursors and electron-positron pair loading from erupting fireballs
Enrico Ramirez-Ruiz, Andrew I. MacFadyen, Davide Lazzati
Recent observations suggest that long-duration gamma-ray bursts and their afterglows are produced by highly relativistic jets emitted in core-collapse explosions. As the jet makes…