Large-Scale Dynamo of Accretion Disks Around Supermassive Nonrotating Black Holes

Details Large-Scale Dynamo of Accretion Disks Around Supermassive Nonrotating Black Holes Large-Scale Dynamo of Accretion Disks Around Supermassive Nonrotating Black Holes

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006seraj.173...49p&link_type=abstract

Serbian Astronomical Journal (http://saj.matf.bg.ac.yu/)

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Galaxies: Active, Accretion, Accretion Disks, Mhd, Magnetic Fields

Scientific paper

In this paper one presents an analytical model of accretion disk magnetosphere dynamics around supermassive nonrotating black holes in the centers of active galactic nuclei. Based on general relativistic equations of magnetohydrodynamics, the nonstationary solutions for time-dependent dynamo action in the accretion disks, spatial and temporal distribution of magnetic field are found. It is shown that there are two distinct stages of dynamo process: the transient and the steady-state regimes, the induction of magnetic field at t>6.6665× 10(11) GM/c(3) s becomes stationary, magnetic field is located near the innermost stable circular orbit, and its value rises up to ˜ 10(5) G. Applications of such systems with nonrotating black holes in real active galactic nuclei are discussed.

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