Gamma-Ray Bursts: Recent Relativistic Simulations

Computer Science – Numerical Analysis

Scientific paper

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Gamma-Ray Sources (Astronomical), Supernovae, Numerical Analysis, Astrophysical Jets, Gamma-Ray Sources, Gamma-Ray Bursts, Supernovae, Hydrodynamics

Scientific paper

Gamma-ray bursts are ultra-relativistic explosions resulting in some cases from the death of massive stars. Numerical modeling of these explosions is challenging because of the extreme Lorentz factors (Γ>~100) and the range of length scales encountered. Simulations of collapsar disks and afterglow jets are being undertaken with a new special relativistic hydrodynamics code RAM (Zhang & MacFadyen 2005) utilizing adaptive mesh refinement (AMR) in order to cover the large dynamical range necessary to adequately resolve thin relativistic structures.

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