Generalized Pseudo-Newtonian Potential for Studying Accretion Disk Dynamics in Off-Equatorial Planes Around Rotating Black Holes: Description of a Vector Potential

Ghosh, Shubhrangshu and Mukhopadhyay, Banibrata (2007) Generalized Pseudo-Newtonian Potential for Studying Accretion Disk Dynamics in Off-Equatorial Planes Around Rotating Black Holes: Description of a Vector Potential. In: The Astrophysical Journal, 667 (1). pp. 367-374.

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Abstract

We prescribe a pseudo-Newtonian vector potential for studying accretion disks around Kerr black holes. The potential is useful to study the inner properties of disk not confined to the equatorial plane where general relativistic effect is indispensable. Therefore, we incorporate the essential properties of the metric at the inner radii through the pseudo-Newtonian potential derived from the general Kerr spacetime. The potential, reproducing most of the salient features of the general-relativity, is valid for entire regime of Kerr parameter. It reproduces the last stable circular orbit exactly as that in the Kerr geometry. It also reproduces last bound orbit and energy at last stable circular orbit with a maximum error \sim 7% and \sim 15% respectively upto an orbital inclination $30^o$.

Item Type:	Journal Article
Publication:	The Astrophysical Journal
Publisher:	The American Astronomical Society
Additional Information:	Copyright of this article belongs to the American Astronomical Society.
Keywords:	accretion;accretion disk;black hole physics;gravitation;relativity.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	04 Aug 2008
Last Modified:	19 Sep 2010 04:48
URI:	http://eprints.iisc.ac.in/id/eprint/15382

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