On the origin of long gamma-ray bursts

Details On the origin of long gamma-ray bursts On the origin of long gamma-ray bursts

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.396l..81v&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 396, Issue 1, pp. L81-L84.

Physics

3

Black Hole Physics, Gravitational Waves, Turbulence, Gamma-Rays: Bursts

Scientific paper

The HETE II and Swift discoveries of long gamma-ray bursts (GRBs) with and without supernovae reveal a diversity in their astronomical origin with otherwise a common inner engine. The durations, spectral-energy correlations and light curves in gamma-rays are in remarkable agreement with viscous spin-down of stellar mass black holes against surrounding high-density matter, as may ensue in core collapse of massive stars and by tidal break-up of neutron stars in mergers with a companion black hole or another neutron star. While mergers produce a preceding positive chirp in gravitational-wave emissions, black hole spin-down produces a negative chirp in relaxation to a nearly Schwarzschild black hole, followed by quasi-normal mode ringing of the event horizon. Chirps hereby provide unambiguous identification of the origin of long GRBs.

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