Evolution of Dimensionless Angular Momentum of Central Black Holes of Accretion Disks

Details Evolution of Dimensionless Angular Momentum of Central Black Holes of Accretion Disks Evolution of Dimensionless Angular Momentum of Central Black Holes of Accretion Disks

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998gregr..30.1025w&link_type=abstract

General Relativity and Gravitation, Volume 30, Issue 7, pp.1025-1035

Physics

7

Accretion Disks, Thin Vs. Thick

Scientific paper

The effects of the Blandford-Znajek (BZ) process on the evolution of the central black holes of accretion disks are investigated. It is proved that the dimensionless angular momentum a* of the central black hole will evolve to a stable value (a_*^c )^I equiv 0.9831 in the case of thin disks, while it will evolve to a stable value (a_*^c )^{II} equiv 0.9921 in the case of thick disks. These results imply that the central black holes of accretion disks will never evolve to extreme Kerr black holes.

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