Gravitational Radiation from Gamma-Ray Burst Progenitors

Details Gravitational Radiation from Gamma-Ray Burst Progenitors Gravitational Radiation from Gamma-Ray Burst Progenitors

2002-10-09

arxiv.org/abs/astro-ph/0210211v2

Astrophys.J. 589 (2003) 861-870

Astronomy and Astrophysics

Astrophysics

26 pages, 5 figures, accepted for publication in ApJ

Scientific paper

10.1086/374733

We study gravitational radiation from various proposed gamma-ray burst (GRB) progenitor models, in particular compact mergers and massive stellar collapses. These models have in common a high angular rotation rate, and the final stage involves a rotating black hole and accretion disk system. We consider the in-spiral, merger and ringing phases, and for massive collapses we consider the possible effects of asymmetric collapse and break-up, as well bar-mode instabilities in the disks. We calculate the strain and frequency of the gravitational waves expected from various progenitors, at distances based on occurrence rate estimates. Based on simplifying assumptions, we give estimates of the probability of detection of gravitational waves by the advanced LIGO system from the different GRB scenarios.

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