Showing 2002 · astro-phShow all

7 papers · 2 filters

astro-ph2002★ 699 cited

Stability of Standing Accretion Shocks, With an Eye Toward Core Collapse Supernovae

John M. Blondin, Anthony Mezzacappa, Christine DeMarino

We examine the stability of standing, spherical accretion shocks. Accretion shocks arise in core collapse supernovae (the focus of this paper), star formation, and accreting white…

astro-ph2002★ 40 cited

BBN And CMB Constraints On Dark Energy

James P. Kneller, Gary Steigman

Current observational data favor cosmological models which differ from the standard model due to the presence of some form of dark energy and, perhaps, by additional contributions…

astro-ph2002★ 97 cited

X-Ray Synchrotron Emitting Fe-Rich Ejecta in SNR RCW 86

Jeonghee Rho, Kristy K. Dyer, Kazimierz J. Borkowski +1

Supernova remnants may exhibit both thermal and nonthermal X-ray emission. We present Chandra observations of RCW 86. Striking differences in the morphology of X-rays below 1 keV a…

astro-ph2002★ 6 cited

Delayed Nickel Decay in Gamma Ray Bursts

G. C. McLaughlin, R. A. M. J. Wijers

Recently observed emission lines in the X-ray afterglow of gamma ray bursts suggest that iron group elements are either produced in the gamma ray burst, or are present nearby. If t…

astro-ph2002★ 28 cited

Off-Axis Neutrino Scattering in GRB Central Engines

Nathan D. George, Arkady Kheyfets, John M. McGhee +1

The search for an understanding of an energy source great enough to explain the gamma-ray burst (GRB) phenomena has attracted much attention from the astrophysical community since…

astro-ph2002★ 47 cited

The Angular Expansion and Distance of the Planetary Nebula BD+30 3639

Jianyang Li, J. Patrick Harrington, Kazimierz J. Borkowski

The WFPC2 camera aboard the HST was used to obtain images of the planetary nebula BD+30 3639 at two epochs separated by 5.663 years. The expansion of the nebula in the H-alpha and…

astro-ph2002★ 73 cited

Nonlinear Particle Acceleration in Relativistic Shocks

Donald C. Ellison, Glen P. Double

Monte Carlo techniques are used to model nonlinear particle acceleration in parallel collisionless shocks of various speeds, including mildly relativistic ones. When the accelerati…