A calorimetric test for Kerr black holes in gamma-ray bursts

Details A calorimetric test for Kerr black holes in gamma-ray bursts A calorimetric test for Kerr black holes in gamma-ray bursts

2001-10-18

arxiv.org/abs/astro-ph/0110422v1

Astrophys.J. 562 (2001) L51-L54

Astronomy and Astrophysics

Astrophysics

To appear in Astroph. J. Lett

Scientific paper

10.1086/338120

Cosmological gamma-ray bursts are potentially associated with systems harboring a black rotating black hole. Calorimetry on yet "unseen" emissions in gravitational waves from a surrounding torus may provide a measure for its rotational energy. We introduce a compactness parameter $\alpha=2\pi\int fdE$ for the fluence $E$ and frequency $f$ in gravitational waves. For black hole-torus systems, $\alpha\simeq 2\pi Ef\simeq 0.005-0.05$ may exceed the upper bound $\alpha^*\simeq 0.005$ for rapidly rotating neutron stars. A duration in gravitational radiation consistent with the redshift corrected durations of the BATSE catalogue defines an association with long GRBs. This promises a new test for Kerr black holes as objects in Nature.

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