3D simulations of the accretion process in Kerr space-time with arbitrary value of the spin parameter

Details 3D simulations of the accretion process in Kerr space-time with arbitrary value of the spin parameter 3D simulations of the accretion process in Kerr space-time with arbitrary value of the spin parameter

2010-06-22

arxiv.org/abs/1006.4296v2

Phys.Rev.D82:064002,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, 9 figures. v2: refereed version

Scientific paper

10.1103/PhysRevD.82.064002

We present the results of three-dimensional general relativistic hydrodynamic simulations of adiabatic and spherically symmetric accretion in Kerr space-time. We consider compact objects with spin parameter $|a_*| \le 1$ (black holes) and with $|a_*| > 1$ (super-spinars). Our full three-dimensional simulations confirm the formation of equatorial outflows for high values of $|a_*|$, as found in our previous work in 2.5 dimensions. We show that the critical value of $|a_*|$ determining the onset of powerful outflows depends mainly on the radius of the compact object. The phenomenon of equatorial outflows can hardly occur around a black hole and may thus be used to test the bound $|a_*| \le 1$ for astrophysical black hole candidates.

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