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25 April 2024

» arxiv » 0808.2860

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Three-Dimensional Simulations of Magnetized Thin Accretion Disks around Black Holes: Stress in the Plunging Region
Rebecca Shafee ; Jonathan C. McKinney ; Ramesh Narayan ; Alexander Tchekhovskoy ; Charles F. Gammie ; Jeffrey E. McClintock ;
Date:	21 Aug 2008
Abstract:	We describe three-dimensional general relativistic magnetohydrodynamic simulations of a geometrically thin accretion disk around a non-spinning black hole. The disk has a thickness $h/rsim0.05-0.1$ over the radius range $(2-20)GM/c^2$. In steady state, the specific angular momentum profile of the inflowing magnetized gas deviates by less than 2% from that of the standard thin disk model of Novikov & Thorne (1973). In addition, although the magnetic torque at the radius of the innermost stable circular orbit (ISCO) does not vanish, it is only $sim2%$ of the inward flux of angular momentum at this radius. Both results indicate that magnetic coupling across the ISCO is relatively unimportant for geometrically thin disks around non-spinning black holes.
Source:	arXiv, 0808.2860
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