The collapsar model for gamma-ray bursts

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Gamma-Ray Sources, Gamma-Ray Bursts, Radiation Mechanisms, Polarization, Late Stages Of Stellar Evolution

Scientific paper

Cosmic gamma-ray bursts (GRBs) have been an intriguing mystery for over thirty years. Recent observation and theoretical progress has led to important progress in the last three years. I describe here some of the observational background in the field of GRB research with an emphasis on how collapsars fit into the picture. Collapsars are massive rotating stars which collapse to form rapidly accreting black holes. These accretion powered transients are capable of producing classical gamma-ray bursts of long duration class. They may also make asymmetric stellar explosions which should be observable as supernovae with large explosion energies. Here, I review some of the GRB observations as they relate to the collapsar model and mergers of compact ninaries. .

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