Gravitational waves from the Papaloizou-Pringle instability in black hole-torus systems

Details Gravitational waves from the Papaloizou-Pringle instability in black hole-torus systems Gravitational waves from the Papaloizou-Pringle instability in black hole-torus systems

2011-05-25

arxiv.org/abs/1105.5035v1

Phys.Rev.Lett.106:251102,2011

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 4 figure, to be published in PRL

Scientific paper

10.1103/PhysRevLett.106.251102

Black hole (BH)--torus systems are promising candidates for the central engine of gamma-ray bursts (GRBs), and also possible outcomes of the collapse of supermassive stars to supermassive black holes (SMBHs). By three-dimensional general relativistic numerical simulations, we show that an $m=1$ nonaxisymmetric instability grows for a wide range of self-gravitating tori orbiting BHs. The resulting nonaxisymmetric structure persists for a timescale much longer than the dynamical one, becoming a strong emitter of large amplitude, quasiperiodic gravitational waves. Our results indicate that both, the central engine of GRBs and newly formed SMBHs, can be strong gravitational wave sources observable by forthcoming ground-based and spacecraft detectors.

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