Thick disk accretion in Kerr space-time with arbitrary spin parameters

Details Thick disk accretion in Kerr space-time with arbitrary spin parameters Thick disk accretion in Kerr space-time with arbitrary spin parameters

2010-09-26

arxiv.org/abs/1009.5080v1

Phys.Rev.D82:124037,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 10 figures

Scientific paper

10.1103/PhysRevD.82.124037

In this paper we extend our previous works on spherically symmetric accretion onto black holes and super-spinars to the case in which the fluid has a finite angular momentum initially. We run 2.5D and 3D general relativistic hydrodynamic simulations of the accretion of a fat disk. We study how the accretion process changes by changing the values of the parameters of our model. We show that the value of the fluid angular momentum critically determines turn-on and off the production of powerful equatorial outflows around super-spinars. For corotating disks, equatorial outflows are efficiently generated, even for relatively low spin parameters or relatively large super-spinar radii. For counterrotating disks, equatorial outflows are instead significantly suppressed, and they are possible only in limited cases. We also study accretion around a tilted disk.

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