Intermediate-mass black holes in globular clusters: constraints on the spin of a black hole

Details Intermediate-mass black holes in globular clusters: constraints on the spin of a black hole Intermediate-mass black holes in globular clusters: constraints on the spin of a black hole

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap.....54..548b&link_type=abstract

Astrophysics, Volume 54, Issue 4, pp.548-552

Astronomy and Astrophysics

Astrophysics

1

Black Holes: Magnetic Field: Globular Clusters: Accretion

Scientific paper

The spin of central black holes with intermediate masses in globular clusters is determined using the well known relationship between the kinetic power of a relativistic jet and the observed radio luminosity of the region closest to a central black hole. The estimate of the magnitude of the spin is based on the known Blandford-Znajek mechanism. The magnetic field near the event horizon of a black hole is determined using a magnetic coupling mechanism that assumes equality between the densities of the magnetic and kinetic energies of the accreting gas (the Magnetic Coupling Model). The rate of accretion dot{M} is derived on the basis of the Bondi-Hoyle mechanism.

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