Gamma-ray bursts, supernova kicks, and gravitational radiation

Details Gamma-ray bursts, supernova kicks, and gravitational radiation Gamma-ray bursts, supernova kicks, and gravitational radiation

2002-04-22

arxiv.org/abs/astro-ph/0204358v1

Astrophys.J. 579 (2002) L63-L66

Astronomy and Astrophysics

Astrophysics

10 pages, 2 figures; submitted to ApJ Letters

Scientific paper

10.1086/345288

We suggest that the collapsing core of a massive rotating star may fragment to produce two or more compact objects. Their coalescence under gravitational radiation gives the resulting black hole or neutron star a significant kick velocity, which may explain those observed in pulsars. A gamma-ray burst can result only when this kick is small. Thus only a small fraction of core-collapse supernovae produce gamma-ray bursts. The burst may be delayed significantly (hours - days) after the supernova, as suggested by recent observations. If this picture is correct, core-collapse supernovae should be significant sources of gravitational radiation with a chirp signal similar to a coalescing binary.

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