Magnetic connection and current distribution in black hole accretion discs

Details Magnetic connection and current distribution in black hole accretion discs Magnetic connection and current distribution in black hole accretion discs

2009-05-06

arxiv.org/abs/0905.0725v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

5 pages, 4 figures, 2 tables. Accepted by MNRAS, 05/05/2009

Scientific paper

We discuss one of the possible origins of large-scale magnetic fields based on a continuous distribution of toroidal electric current flowing in the inner region of the disc around a Kerr black hole (BH) in the framework of general relativity. It turns out that four types of configuration of the magnetic connection (MC) are generated, i.e., MC of the BH with the remote astrophysical load (MCHL), MC of the BH with the disc (MCHD), MC of the plunging region with the disc (MCPD) and MC of the inner and outer disc regions (MCDD). It turns out that the Blandford-Znajek (BZ) process can be regarded as one type of MC, i.e., MCHL. In addition, we propose a scenario for fitting the quasi-periodic oscillations in BH binaries based on MCDD associated with the magnetic reconnection.

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