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

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...

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Bibliographic Details
Published in:Astrophysics 2011-12, Vol.54 (4), p.548-552
Main Authors: Buliga, S. D., Globina, V. I., Gnedin, Yu. N., Natsvlishvili, T. M., Piotrovich, M. Yu, Shakht, N. A.
Format: Article
Language:English
Subjects:
Accretion
Accretion disks
Analysis
Astronomy
Astrophysics
Astrophysics and Astroparticles
Astrophysics and Cosmology
Black holes
Kinetic energy
Magnetic fields
Observations and Techniques
Physics
Physics and Astronomy
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary: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 is derived on the basis of the Bondi-Hoyle mechanism.
ISSN:0571-7256
1573-8191
DOI:10.1007/s10511-011-9204-7