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Issue A&A
Volume 418, Number 3, May II 2004
Page(s) 795 - 799
Section Astrophysical processes
DOI http://dx.doi.org/10.1051/0004-6361:20040062



A&A 418, 795-799 (2004)
DOI: 10.1051/0004-6361:20040062

Rotating central objects with hard surfaces: A pseudo-Newtonian potential for relativistic accretion disks

S. Ghosh

Department of Physics and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur-721302, India
(Received 14 January 2003 / Accepted 31 March 2003 )

Abstract
Here we furnish a pseudo-Newtonian potential for accretion disk modeling around rotating central objects having a hard surface. Thus, the potential may be useful to describe the accretion disk around rotating neutron stars and strange stars. The potential can describe the general relativistic effects in accretion disks properly, essentially studying the relativistic hydrodynamics of disks. To understand the fluid dynamics of the accretion disk around rotating central objects with a hard surface, it is necessary to incorporate the rotation of the central object, which affects the inner edge of the disk. We derive our potential, starting from the Hartle Thorne metric. The potential can reproduce all the essential properties of general relativity with a $10\%$ error at most, for slowly rotating neutron/strange stars.


Key words: accretion, accretion disks -- gravitation -- relativity




© ESO 2004


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