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

Abstract

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 ${\alpha }^{\ast }\simeq 0.005$ 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.

To appear in Astroph. J. Lett

References in corpus (3)

• A Black Hole in the Superluminal source SAX J1819.3-2525 (V4641 Sgr)
• Gravitational radiation from a torus around a black hole
• Calorimetry of gamma-ray bursts: echos in gravitational waves

Cited by in corpus (9)

• Gamma-Ray Bursts
• Gamma-Ray Bursts: Progress, Problems & Prospects
• Gravitational Radiation from Gamma-Ray Burst Progenitors
• Fragmentation of Collapsar Disks and the Production of Gravitational Waves
• Theory and astrophysical consequences of a magnetized torus around a rapidly rotating black hole
• LIGO/VIRGO searches for gravitational radiation in hypernovae
• Polarized Gravitational Waves from Gamma-Ray Bursts
• Gravitational Wave Signatures of Hyperaccreting Collapsar Disks
• Collapsar Disk Outflows III: Detectable Neutrino and Gravitational Wave Signatures