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
120 papers · 2 filters
Discovery of a High-Redshift (z=0.96) Cluster of Galaxies Using a FIRST Wide-Angle Tailed Radio Source
Elizabeth L. Blanton, Michael D. Gregg, David J. Helfand +2
Using a combination of near-infrared and optical photometry, along with multi-object spectroscopy, we have confirmed the existence of a high-redshift cluster of galxies at z = 0.96…
The LXeGRIT Compton Telescope Prototype: Current Status and Future Prospects
E. Aprile, A. Curioni, K. L. Giboni +7
LXeGRIT is the first prototype of a novel concept of Compton telescope, based on the complete 3-dimensional reconstruction of the sequence of interactions of individual gamma rays…
On the Background Rate in the LXeGRIT Instrument during the 2000 Balloon Flight
A. Curioni, E. Aprile, K. L. Giboni +7
LXeGRIT is the first prototype of a novel Compton telescope for MeV gamma-ray astrophysics based on a Liquid Xenon Time Projection Chamber (LXeTPC), sensitive in the energy band of…
On the Spiral Structure of NGC 2915 and Dark Matter
F. S. Masset, M. Bureau
NGC 2915 is a blue compact dwarf galaxy embedded in an extended, low surface brightness HI disk exhibiting a two-armed spiral structure and a central bar-like component. Commonly a…
Superhumps in Cataclysmic Binaries. XXIII. V442 Ophiuchi and RX J1643.7+3402
Joseph Patterson, William Fenton, John Thorstensen +15
We report the results of long observing campaigns on two novalike variables: V442 Ophiuchi and RX J1643.7+3402. These stars have high-excitation spectra, complex line profiles sign…
The Soft X-ray Spectrum from NGC 1068 Observed with LETGS on Chandra
A. C. Brinkman, J. S. Kaastra, R. L. J. van der Meer +5
Using the combined spectral and spatial resolving power of the Low Energy Transmission Grating (LETGS) on board Chandra, we obtain separate spectra from the bright central source o…
The positron excess and supersymmetric dark matter
Edward A. Baltz, Joakim Edsjo, Katherine Freese +1
Using a new instrument, the HEAT collaboration has confirmed the excess of cosmic ray positrons that they first detected in 1994. We explore the possibility that this excess is due…
DarkSUSY - A numerical package for supersymmetric dark matter calculations
Paolo Gondolo, Joakim Edsjo, Piero Ullio +3
The question of the nature of dark matter in the Universe remains one of the most outstanding unsolved problems in basic science. One of the best motivated particle physics candida…
An Extreme Ultraviolet Explorer Atlas of Seyfert Galaxy Light Curves: Search for Periodicity
J. P. Halpern, K. M. Leighly, H. L. Marshall
The Deep Survey instrument on the Extreme Ultraviolet Explorer satellite (EUVE) obtained long, nearly continuous soft X-ray light curves of 5-33 days duration for 14 Seyfert galaxi…
Monte Carlo reconstruction of the inflationary potential
Richard Easther, William H. Kinney
We present Monte Carlo reconstruction, a new method for ``inverting'' observational data to constrain the form of the scalar field potential responsible for inflation. This stochas…
Gravitationally redshifted absorption lines in the X-ray burst spectra of a neutron star
J. Cottam, F. Paerels, M. Mendez
The fundamental properties of neutron stars provide a direct test of the equation of state of cold nuclear matter, a relationship between pressure and density that is determined by…
XMM-Newton confirmation of Soft X-ray excess emission in clusters of galaxies - the discovery of O VII emission from an extended warm baryonic component
J. S. Kaastra, R. Lieu, T. Tamura +2
We investigate a sample of 14 clusters of galaxies observed with XMM-Newton in a search for soft X-ray excess emission. In five of these clusters a significant soft excess is evide…
On the magnetic fields and particle acceleration in Cas A
Jacco Vink, J. Martin Laming
We investigate the non-thermal X-ray emission from Cas A. For the hard X-ray continuum we test the model proposed by Laming, which invokes bremsstrahlung from electrons accelerated…
Monte Carlo Methods for X-ray Dispersive Spectrometers
J. R. Peterson, J. G. Jernigan, S. M. Kahn
We discuss multivariate Monte Carlo methods appropriate for X-ray dispersive spectrometers. Dispersive spectrometers have many advantages for high resolution spectroscopy in the X-…
High Resolution X-ray Spectroscopic Constraints on Cooling-Flow Models for Clusters of Galaxies
J. R. Peterson, S. M. Kahn, F. B. S. Paerels +5
We present high resolution X-ray spectra of 14 putative cooling-flow clusters of galaxies obtained with the Reflection Grating Spectrometer on XMM-Newton. The clusters in the sampl…
Deep Searches for Young Pulsars
Fernando Camilo
By 2000 there were only 10 established Galactic pulsar-supernova remnant associations. Two years later there are 16 such associations known. I discuss the work leading to this subs…
The Formation of Stellar Clusters in Turbulent Molecular Clouds: Effects of the Equation of State
Yuexing Li, Ralf S. Klessen, Mordecai-Mark Mac Low
We study numerically the effect of varying the equation of state (EOS) on the formation of stellar clusters in turbulent molecular clouds. Our results show that the EOS plays an im…
X-Ray Evidence for Flare Density Variations and Continual Chromospheric Evaporation in Proxima Centauri
Manuel Guedel, Marc Audard, Stephen L. Skinner +1
Using the XMM-Newton X-ray observatory to monitor the nearest star to the Sun, Proxima Centauri, we recorded the weakest X-ray flares on a magnetically active star ever observed. C…
H2O Masers and Supersonic Turbulence
V. Strelnitski, J. Alexander, S. Gezari +3
We use unpublished and published VLBI results to investigate the geometry and the statistical properties of the velocity field traced by H2O masers in five galactic regions of star…
X-Ray Spectroscopy and Atomic Data
Ehud Behar, Steven M. Kahn
The Laboratory Astrophysics program employing the Lawrence Livermore National Laboratory (LLNL) Electron Beam Ion Trap (EBIT) has been providing useful atomic data in support of th…
Variable Stars in M31's Globular Clusters
David R. Alves, Alex Bergier, Arlin Crotts +1
This paper has been withdrawn.
Nuclear Composition of Gamma-Ray Burst Fireballs
Andrei M. Beloborodov
We study three processes that shape the nuclear composition of GRB fireballs: (1) neutronization in the central engine, (2) nucleosynthesis in the fireball as it expands and cools,…
X-ray and Optical Studies of Millisecond Pulsars in 47 Tucanae
C. O. Heinke, J. E. Grindlay, P. D. Edmonds +1
Our Chandra X-ray observation of the globular cluster 47 Tuc clearly detected most of the 16 MSPs with precise radio positions, and indicates probable X-ray emission from the remai…
The system parameters of DW Ursae Majoris
S. Araujo-Betancor, C. Knigge, K. S. Long +8
We present new constraints on the system parameters of the SW Sextantis star DW Ursae Majoris, based on ultraviolet (UV) eclipse observations with the Hubble Space Telescope. Our d…