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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Translated from Astrofizika, Vol. 54, No. 4, pp. 611–616 (November 2011).
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Buliga, S.D., Globina, V.I., Gnedin, Y.N. et al. Intermediate-mass black holes in globular clusters: constraints on the spin of a black hole. Astrophysics 54, 548–552 (2011). https://doi.org/10.1007/s10511-011-9204-7
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DOI: https://doi.org/10.1007/s10511-011-9204-7