Magnetic extraction of black hole rotational energy

Details Magnetic extraction of black hole rotational energy Magnetic extraction of black hole rotational energy

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..556...23l&link_type=abstract

EXPLOSIVE PHENOMENA IN ASTROPHYSICAL COMPACT OBJECTS: First KIAS Astrophysics Workshop. AIP Conference Proceedings, Volume 556,

Astronomy and Astrophysics

Astrophysics

Black Holes, Classical Black Holes, Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

As a possible inner engine of gamma-ray bursts(GRB's), a black hole with an external magnetic field supported by a surrounding disk or torus is discussed. The Blandford-Znajek process where the rotational energy of the black hole can be extracted as a Poynting flux is reviewed. It is demonstrated that using a simple circuit analysis the disk power increases the effective power of the black hole-accretion disk system, although a part of disk power is dissipated into black hole entropy. We discuss also the evolutions of the black hole mass and angular momentum, taking into account the flow of accreting matter from a strongly magnetized disk using a simplified model. .

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