A Review of Gamma Ray Bursts

Physics – Nuclear Physics

Scientific paper

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Scientific paper

Gamma-ray bursts, an enigma for more than 25 years, are now coming into focus. They involve extraordinary power outputs, and highly relativistic dynamics. The ``trigger'' involves stellar-mass compact objects. The most plausible progenitors, ranging from neutron star binary mergers to collapsars (sometimes called ``hypernovae'') eventually lead to the formation of a black hole with a torus of hot neutron-density material around it, the extractable energy being up to 1054 ergs. Magnetic fields may exceed 1015 G and particles may be accelerated up to >~ 1020 eV. Details of the afterglow may be easier to understand than the initial trigger. Bursts at very high redshift can be astronomically-important as probes of the distant universe.

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