Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.5k papers
- University of MichiganUS2.2k papers
- Brookhaven National LaboratoryUS2.2k papers
- University of California, BerkeleyUS2k papers
- Stony Brook UniversityUS2k papers
- Iowa State UniversityUS1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.9k papers
- University of ChicagoUS1.9k papers
- University of WashingtonUS1.8k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.8k papers
- The University of TokyoJP1.8k papers
- University of ArizonaUS1.8k papers
38 papers · 2 filters
Instabilities of a family of oblate stellar spheroids
J. A. Sellwood, M. Valluri
We have examined the stability of a sequence of oblate elliptical galaxy models having the Stackel form suggested by Kuz'min & Kutuzov. We have employed the 2-integral DFs given by…
The Electron-Screening Correction for the Proton-Proton Reaction
John N. Bahcall, Xuelei Chen, Marc Kamionkowski
We test the Salpeter formalism for the electron screening of the solar proton-proton fusion reaction by solving numerically the relevant Schrodinger equation. We evaluate exactly t…
The Formation of Disk Galaxies
J. J. Dalcanton, D. N. Spergel, F J Summers
We present a scenario for the formation of disks which explains not only the properties of normal galaxies, but the properties of the population of low surface brightness galaxies…
Monitoring the Gamma-Ray Source 2CG 135+1 and the Radio Star LSI+61 303
M. Tavani, W. Hermsen, R. van Dijk +8
We report the results of a CGRO multi-instrument series of observations of the unidentified gamma-ray source 2CG 135+1 and of its possible counterpart, the peculiar radio source GT…
Statistics of Cosmic Microwave Background Polarization
Marc Kamionkowski, Arthur Kosowsky, Albert Stebbins
We present a formalism for analyzing a full-sky temperature and polarization map of the cosmic microwave background. Temperature maps are analyzed by expanding over the set of sphe…
Gravitational Lensing of the X-Ray Background by Clusters of Galaxies
Alexandre Refregier, Abraham Loeb
Gravitational lensing by clusters of galaxies affects the cosmic X-ray background (XRB) by altering the observed density and flux distribution of background X-ray sources. At faint…
X-Ray Emission of Gamma-Ray Bursts
M. Tavani
X-ray emission can provide a crucial diagnostic of gamma-ray bursts (GRBs). We calculate the X-ray and gamma-ray spectra of impulsive acceleration episodes related to GRB pulses. W…
Evidence from quasi-periodic oscillations for a millisecond pulsar in the low mass x-ray binary 4U 0614+091
E. Ford, P. Kaaret, M. Tavani +6
We have detected quasi-periodic oscillations (QPOs) near 1 kHz from the low mass X-ray binary 4U 0614+091 in observations with XTE. The observations span several months and sample…
VATT/Columbia Microlensing Survey of M31 and the Galaxy
Arlin P. S. Crotts
We describe the results and outline the methods used in a search for microlensing events affecting stars in the outer bulge and inner disk of M31, due both to masses in M31 and the…
Expanding the Realm of Microlensing Surveys with Difference Image Photometry
Austin B. Tomaney, Arlin P. S. Crotts
We present a new technique for monitoring microlensing activity even in highly crowded fields, and use this technique to place limits on low-mass MACHOs in the haloes of M31 and th…
Results from a Survey of Gravitational Microlensing towards M31
Arlin P. S. Crotts, Austin B. Tomaney
We describe the results of a search for microlensing events affecting stars in the outer bulge and inner disk of M31, due both to masses in M31 and the Galaxy. These observations,…
Effect of Gravitational Lensing on Measurements of the Sunyaev-Zel'dovich Effect
Abraham Loeb, Alexandre Refregier
The Sunyaev-Zel'dovich (SZ) effect of a cluster of galaxies is usually measured after background radio sources are removed from the cluster field. Gravitational lensing by the clus…
Detailed Analysis of the Cross-Correlation Function between the X-Ray Background and Foreground Galaxies
A. Refregier, D. J. Helfand, R. G. McMahon
Recent ROSAT surveys suggest that galaxies constitute the new class of X-ray sources required to explain the full phenomenology of the cosmic X-Ray Background (XRB). To test this h…
A Probe of Primordial Gravity Waves and Vorticity
Marc Kamionkowski, Arthur Kosowsky, Albert Stebbins
A formalism for describing an all-sky map of the polarization of the cosmic microwave background is presented. The polarization pattern on the sky can be decomposed into two geomet…
Theory of high-energy emission from the pulsar/Be-star system PSR 125963 I: radiation mechanisms and interaction geometry
Marco Tavani, Jonathan Arons
We study the physical processes of the PSR B1259-63 system containing a 47 ms pulsar orbiting around a Be star in a highly eccentric orbit. Motivated by the results of a multiwavel…
The Unidentified Galactic EGRET Sources
Philip Kaaret
The nature of the unidentified gamma-ray point sources in the galactic plane is a long standing puzzle of gamma-ray astronomy. Kaaret and Cottam (1996) showed that 16 of the 25 uni…
Anticorrelated Hard/Soft X-Ray Emission from the X-Ray Burster 4U 0614+091
E. Ford, P. Kaaret, M. Tavani +6
We have detected transient X-ray activity from the X-ray burster 4U~0614+091 simultaneously with BATSE/CGRO (20-100 keV) and ASM/RXTE (1-12 keV). The peak fluxes reach approximatel…
The Absence of X-ray Flashes from Nearby Galaxies and the Gamma-Ray Burst Distance Scale
T. T. Hamilton, E. V. Gotthelf, D. J. Helfand
If typical gamma-ray bursts (GRBs) have X-ray counterparts similar to those detected by Ginga, then sensitive focusing X-ray telescopes will be able to detect GRBs three orders of…
The EINSTEIN Observatory Detection of Faint X-Ray Flashes
E. V. Gotthelf, T. T. Hamilton, D. J. Helfand
We report on the result of an extensive search for X-ray counterparts to Gamma Ray Bursts (GRB) using data acquired with the Imaging Proportional Counter (IPC) on-board the Einstei…
The \mv vs \fe Calibration: I. HST Color-Magnitude Diagrams of 8 Globular Clusters in M 31
F. Fusi Pecci, R. Buonanno, C. Cacciari +6
Color Magnitude Diagrams (CMDs) of individual stars in 8 Globular Clusters in M31 down to about 1 mag fainter (V) than the Horizontal Branch have been obtained with the…
H-alpha Imaging of the Hickson Compact Group 62
M. Valluri, G. C. Anupama
We report results of a search for optical emission line gas in the Hickson compact group 62. From narrow band (H-alpha) imaging observations we estimate 10^4 Msun of ionized hydrog…
Physical Conditions in Low Ionization Regions of the Orion Nebula
J. A. Baldwin, A. Crotts, R. J. Dufour +12
We reexamine the spectroscopic underpinnings of recent suggestions that [O I] and [Fe II] lines from the Orion H II region are produced in gas where the iron-carrying grains have b…
Comment on ``The Dispersion Velocity of Galactic Dark Matter Particles''
Evalyn Gates, Marc Kamionkowski, Michael S. Turner
In a recent Letter (astro-ph/9605001), Cowsik et al. claim that a self-consistent treatment of the dark Galactic halo requires that the local velocity dispersion of dark-matter par…
Determining Cosmological Parameters from the Microwave Background
Arthur Kosowsky, Marc Kamionkowski, Gerard Jungman +1
Recently funded satellites will map the cosmic microwave background radiation with unprecedented sensitivities and angular resolutions. Assuming only primordial adiabatic scalar an…