Magnetic connection and current distribution in black hole accretion discs

Abstract

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.

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

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Cited by in corpus (3)

• A magnetic reconnection model for quasi-periodic oscillations in black hole systems
• Simple analytic formula relating the mass and spin of accreting compact objects to their rapid X-ray variability
• A model for 3:2 HFQPO pairs in black hole binaries based on cosmic battery