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Statistical Properties of Kerr BH Flywheel Model of QSOs/AGNs

Published online by Cambridge University Press:  25 May 2016

S. Nitta*
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, 181-8588 Japan

Abstract

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The aim of this work is to demonstrate the properties of the magnetospheric model around Kerr black holes, so-called the “flywheel” (rotation powered) model. The fly-wheel engine of the BH accretion disk system is applied to the statistics of QSOs/AGNs. Nitta, Takahashi, & Tomimatsu clarified the individual evolution of the Kerr black-hole fly-wheel engine, which is parameterized by black-hole mass, initial Kerr parameter, magnetic field near the horizon, and a dimensionless small parameter. We impose a statistical model for the initial mass function of an ensemble of black holes using the Press-Schechter formalism. With the help of additional assumptions, we can discuss the evolution of the luminosity function and the spatial number density (population) of QSOs/AGNs. The result explains well the decrease of very bright QSOs and decrease of population after z ~ 2.

Type
Part II: Posters
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

Nitta, S. 1999, MNRAS, 308, 995.CrossRefGoogle Scholar
Nitta, S., Takahashi, M., & Tomimatsu, A. 1991, Phys. Rev. D, 44, 2295.CrossRefGoogle Scholar