Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2k papers
- University of British ColumbiaCA1.9k papers
- McGill UniversityCA1.9k papers
- University of VictoriaCA1.8k papers
- University of California, Santa CruzUS1.7k papers
- Rutherford Appleton LaboratoryGB1.7k papers
- University of ManchesterGB1.7k papers
- Queen Mary University of LondonGB1.7k papers
- University of PisaIT1.6k papers
- University of EdinburghGB1.6k papers
- University of BirminghamGB1.6k papers
- Heidelberg UniversityDE1.6k papers
22 papers · 2 filters
Cosmic Rays and High-Energy Neutrinos from Gamma-Ray Bursts
C. D. Dermer, A. Atoyan
Several lines of evidence point to a relationship between gamma-ray bursts (GRBs) and the high mass stars that explode as supernovae. Arguments that GRB sources accelerate cosmic r…
Analysis of a Very Massive DA White Dwarf via the Trigonometric Parallax and Spectroscopic Methods
C. C. Dahn, P. Bergeron, J. Liebert +2
By two different methods, we show that LHS 4033 is an extremely massive white dwarf near its likely upper mass limit for destruction by unstable electron captures. From the accurat…
Tracing the Magnetic Field in Orion A
Martin Houde, C. Darren Dowell, Roger. H. Hildebrand +5
We use extensive 350 um polarimetry and continuum maps obtained with Hertz and SHARC II along with HCN and HCO+ spectroscopic data to trace the orientation of the magnetic field in…
High-Energy Cosmic Rays from Galactic and Extragalactic Gamma-Ray Bursts
S. D. Wick, C. D. Dermer, A. Atoyan
A model for high-energy (>10^14 eV) cosmic rays (HECRs) from galactic and extragalactic gamma-ray bursts (GRBs) is summarized. Relativistic outflows in GRBs are assumed to inject p…
On the Measurement of the Magnitude and Orientation of the Magnetic Field in Molecular Clouds
Martin Houde, Pierre Bastien, Jessie L. Dotson +6
We demonstrate that the combination of Zeeman, polarimetry and ion-to-neutral molecular line width ratio measurements permits the determination of the magnitude and orientation of…
The Alignment of the Magnetic Field and Collimated Outflows in Star-forming Regions: the Case of NGC 2071
Martin Houde, Thomas G. Phillips, Pierre Bastien +2
The magnetic field is believed to play a crucial role in the process of star formation. From the support it provides during the initial collapse of molecular clouds to the creation…
Probing the Magnetic Field with Molecular ion Spectra. II
Martin Houde, Ruisheng Peng, Thomas G. Phillips +2
We present further observational evidence in support of our earlier proposal (Houde et al. 2000) for detecting the presence of the magnetic field in molecular clouds by comparing s…
Probing the Magnetic Field with Molecular Ion Spectra
Martin Houde, Pierre Bastien, Ruisheng Peng +2
Observations of the effect of the magnetic field on its environment are usually achieved with techniques which rely on the interaction with the spin of the particles under study. B…
Protostellar collapse induced by compression. II: rotation and fragmentation
P. Hennebelle, A. Whitworth, S. Cha +1
We investigate numerically and semi-analytically the collapse of low-mass, rotating prestellar cores. Initially, the cores are in approximate equilibrium with low rotation (the ini…
A Subarcsecond Companion to the T Tauri Star AS 353B
A. T. Tokunaga, Bo Reipurth, W. Gaessler +14
Adaptive optics imaging of the bright visual T Tauri binary AS 353 with the Subaru Telescope shows that it is a hierarchical triple system. The secondary component, located 5.6" so…
High-Energy Cosmic Rays from Gamma-Ray Bursts
Stuart D. Wick, Charles D. Dermer, Armen Atoyan
A model is proposed for the origin of cosmic rays (CRs) from ~10^14 eV to the highest energies, >10^20 eV. Gamma-Ray Bursts (GRBs) are assumed to inject CR protons and ions into th…
Mass Modeling of Disk Galaxies: Constraints, Degeneracies and Adiabatic Contraction
Aaron A. Dutton, Stephane Courteau, Roelof de Jong +1
This paper addresses available constraints on mass models fitted to rotation curves. Mass models of disk galaxies have well-known degeneracies, that prevent a unique mass decomposi…
Carbon star survey in the Local Group. VII. NGC 3109 a galaxy without a stellar halo
S. Demers, P. Battinelli
We present a CFH12K wide field survey of the carbon star population in and around NGC 3109. Carbon stars, the brightest members of the intermediate-age population, were found nearl…
On the Purity of the ZZ Ceti Instability Strip: Discovery of More Pulsating DA White Dwarfs on the Basis of Optical Spectroscopy
P. Bergeron, G. Fontaine, M. Billeres +2
We report the discovery of two new ZZ Ceti pulsators, LP 133-144 and HE 1258+0123, selected on the basis of model atmosphere fits to optical spectroscopic data. The atmospheric par…
HST/STIS observations of sdBV stars: testing diffusion and pulsation theory
S. J. O'Toole, U. Heber, P. Chayer +3
We present the initial results of an abundance analysis of echelle UV spectra of 5 hot subdwarf B (sdB) stars. These stars have been identified as core helium burning objects on th…
Triggered massive-star formation at the border of the HII region Sh 104
L. Deharveng, B. Lefloch, A. Zavagno +4
We present millimetre-line imaging of the Galactic HII region Sh 104. We show that it is surrounded by a ring of molecular gas and dust. Four large molecular condensations are regu…
The HI environment of the Sculptor dwarf spheroidal galaxy
Antoine Bouchard, Claude Carignan, Sergey Mashchenko
New observations of the neutral hydrogen (HI) in and around the line of sight of the Sculptor dwarf spheroidal (dSph) are presented. The data obtained with the single-dish Parkes t…
Angular Momentum Transport by Internal Gravity Waves. I - Pop I Main Sequence Stars
Suzanne Talon, Corinne Charbonnel
We examine the generation of gravity waves by the surface convection zone of low-mass main sequence stars with solar metallicity. It is found that the total momentum luminosity in…
Gemini observations of Wolf-Rayet Stars in the Local Group Starburst Galaxy IC10
P. A. Crowther, L. Drissen, J. B. Abbott +2
We present Gemini-N GMOS and CFHT MOS spectroscopy of Wolf-Rayet candidates in the Local Group dwarf galaxy IC10 that were previously identified by Massey et al. and Royer et al. F…
Polarimetric variations of binary stars. V. Pre-main-sequence spectroscopic binaries located in Ophiuchus and Scorpius
N. Manset, P. Bastien
We present polarimetric observations of 7 pre-main-sequence (PMS) spectroscopic binaries located in the rho Oph and Upper Sco star forming regions (SFRs). The average observed pola…
Spatially Resolved 3 um Spectroscopy of IRAS 22272+5435: Formation and Evolution of Aliphatic Hydrocarbon Dust in Proto-Planetary Nebula
M. Goto, W. Gaessler, Y. Hayano +9
We present medium-resolution 3 um spectroscopy of the carbon-rich proto-planetary nebula IRAS 22272+5435. Spectroscopy with the Subaru Telescope adaptive optics system revealed a s…
High Energy Neutrinos from Gamma Ray Bursts
Charles D. Dermer, Armen Atoyan
We treat high-energy neutrino production in GRBs. Detailed calculations of photomeson neutrino production are presented for the collapsar model, where internal nonthermal synchrotr…