Influence of Different Mass-ratio Merges on Spins of Black Holes

Details Influence of Different Mass-ratio Merges on Spins of Black Holes Influence of Different Mass-ratio Merges on Spins of Black Holes

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009acasn..50..233z&link_type=abstract

Acta Astronomica Sinica, vol. 50, no. 3, p. 233-242

Physics

Black Hole Physics, Radio Continuum: Galaxies: Nuclei

Scientific paper

The distribution of massive black hole spins only in consideration of merges in their evolution is discussed. The model used in this paper follows Blandford (2003) and Wilson (1994) to treat the angular momentum via post-Newton approximation. Using Monte Carlo simulation, the results in different merge conditions are obtained. Major mergers can cause abrupt changes of black holes spins, but minor mergers always smoothly slow the spin down. The distribution of black hole spins can stay in a stable level under the assumption that the distribution of mass-ratio in merging is in form of a power-law function. According to the stimulation results, the possible relationship between radio-loud active galactic nucleus (AGNs) and black hole spins is also discussed. At last, the distribution of radio-loudness is computed and discussed.

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