Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Panjab UniversityIN1.9k papers
- University of Illinois ChicagoUS1.9k papers
- Purdue University West LafayetteUS1.9k papers
- Centre National de la Recherche ScientifiqueFR1.8k papers
- Florida State UniversityUS1.8k papers
- Fermi National Accelerator LaboratoryUS1.8k papers
- University of RochesterUS1.7k papers
- University of California, RiversideUS1.7k papers
- University of VirginiaUS1.7k papers
- Brown UniversityUS1.7k papers
- Texas A&M UniversityUS1.7k papers
- University of KansasUS1.7k papers
18 papers · 2 filters
Correlation between the TeV and X-ray emission in high--energy peaked BL Lac objects
K. Katarzynski, G. Ghisellini, F. Tavecchio +3
We discuss the correlation between the evolution of the TeV emission and X-ray radiation observed in high-energy peaked BL Lac objects. We describe such a correlation by a simple p…
Transforming observational data and theoretical isochrones into the ACS/WFC Vega-mag system
Luigi R. Bedin, Santi Cassisi, Fiorella Castelli +6
We propose a zero-point photometric calibration of the data from the ACS/WFC on board the Hubble Space Telescope, based on a spectrum of Vega and the most up to date in-flight tran…
Radiative Effects on Particle Acceleration in Electromagnetic Dominated Outflows
Koichi Noguchi, Edison Liang, Kazumi Nishimura
Plasma outflows from gamma-ray bursts (GRB), pulsar winds, relativistic jets, and ultra-intense laser targets radiate high energy photons. However, radiation damping is ignored in…
Forbidden Line Emission in the Eccentric Spectroscopic Binaries DQ Tauri and UZ Tauri E Monitored over an Orbital Period
M. Huerta, P. Hartigan, R. J. White
We present echelle spectroscopy of the close pre-main-sequence binary star systems DQ Tau and UZ Tau-E. Over a 16 day time interval we acquired 14 nights of spectra for DQ Tau and…
Metallicities on the Double Main Sequence of omega Centauri Imply Large Helium Enhancement
Giampaolo Piotto, Sandro Villanova, Luigi R. Bedin +10
Having shown in a recent paper that the main sequence of omega Centauri is split into two distinct branches, we now present spectroscopic results showing that the bluer sequence is…
From Radio to X-ray: Flares on the dMe Flare Star EV Lacertae
R. A. Osten, S. L. Hawley, J. C. Allred +2
We present the results of a campaign to observe flares on the M dwarf flare star EV Lacertae over the course of two days in 2001 September, utilizing a combination of radio continu…
Interpretations of gamma-ray burst spectroscopy. II. Bright BATSE bursts
Felix Ryde, Dan Kocevski, Zsolt Bagoly +2
We analyze the spectral lags of a sample of bright gamma-ray burst pulses observed by CGRO BATSE and compare these with the results of high-resolution spectroscopical investigation…
Diffusive Shock Acceleration of High Energy Cosmic Rays
Matthew G. Baring
The process of diffusive acceleration of charged particles in shocked plasmas is widely invoked in astrophysics to account for the ubiquitous presence of signatures of non-thermal…
Testing the Reality of Strong Magnetic Fields on T Tauri Stars: The Naked T Tauri Star Hubble 4
Christopher M. Johns-Krull, Jeff A. Valenti, Steven H. Saar
High resolution optical and infrared (IR) echelle spectra of the naked (diskless) T Tauri star Hubble 4 are presented. The K band IR spectra include 4 Zeeman sensitive Ti I lines a…
The XENON Dark Matter Search Experiment
E. Aprile, K. L. Giboni, P. Majewski +14
The XENON experiment aims at the direct detection of dark matter in the form of WIMPs (Weakly Interacting Massive Particles) via their elastic scattering off Xe nuclei. A fiducial…
The submm properties of GRB host galaxies
N. R. Tanvir, V. E. Barnard, A. W. Blain +8
Long duration gamma-ray bursts (GRBs) accompany the deaths of some massive stars and hence, since massive stars are short lived, are a tracer of star formation activity. Given that…
The double main sequence of Omega Centauri
L. R. Bedin, G. Piotto, J. Anderson +4
Recent, high precision photometry of Omega Centauri, the biggest Galactic globular cluster, has been obtained with Hubble Space Telescope. The color magnitude diagram reveals an un…
A Study of Prompt Emission Mechanisms in Gamma-Ray Bursts
Matthew G. Baring, Matthew L. Braby
The principal paradigm for the prompt emission of gamma-ray bursts invokes diffusive acceleration at shocks internal to the dynamic ultrarelativistic outflow. This paper explores e…
Omega Centauri: The Population Puzzle Goes Deeper
L. R. Bedin, G. Piotto, J. Anderson +5
We present HST observations that show a bifurcation of colors in the middle main sequence of the globular cluster Omega Centauri. We see this in three different fields, observed wi…
KH 15D: A Spectroscopic Binary
John A. Johnson, Geoffrey W. Marcy, Catrina M. Hamilton +2
We present the results of a high-resolution spectroscopic monitoring program of the eclipsing pre-main-sequence star KH 15D that reveal it to be a single-line spectroscopic binary.…
The Far-Ultraviolet Spectra of TW Hya. II. Models of H2 Fluorescence in a Disk
Gregory J. Herczeg, Brian E. Wood, Jeffrey L. Linsky +2
We measure the temperature of warm gas at planet-forming radii in the disk around the classical T Tauri star (CTTS) TW Hya by modelling the H2 fluorescence observed in HST/STIS and…
High-speed Keck II and RXTE spectroscopy of Cygnus X-2: (I) Three X-ray components revealed by correlated variability
K. O'Brien, Keith Horne, Richard Gomer +2
We have performed simultaneous X-ray and optical spectroscopic observations of the Low Mass X-ray Binary Cygnus X-2. We have used a new data system attached to the Low Resolution I…
Multi-Site observations of SU Aurigae
Y. C. Unruh, J. -F. Donati, J. M. Oliveira +20
We present results from the 1996 MUSICOS (MUlti-SIte COntinuous Spectroscopy) campaign on the T Tauri star SU Aurigae. We find a 2.7-d periodicity in the He I (587.6 nm) line and s…