Three-Dimensional Simulations of Vertical Magnetic Flux in the Immediate Vicinity of Black Holes

Journal Article · Wed Sep 30 04:00:00 EDT 2009 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/704/2/1065· OSTI ID:964985

Punsly, B ^[1]; Igumenshchev, I V; Hirose, S

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, NY

This article reports on three-dimensional MHD simulations of non-rotating and rapidly rotating black holes and the adjacent black hole accretion disk magnetospheres. A particular emphasis is placed on the vertical magnetic flux that is advected inward from large radii and threads the equatorial plane near the event horizon. In both cases of non-rotating and rotating black holes, the existence of a significant vertical magnetic field in this region is like a switch that creates powerful jets. There are many similarities in the vertical flux dynamics in these two cases in spite of the tremendous enhancement of azimuthal twisting of the field lines and enhancement of the jet power because of an “ergospheric disk” in the Kerr metric. A three-dimensional approach is essential because two-dimensional axisymmetric flows are incapable of revealing the nature of the vertical flux near a black hole. Poloidal field lines from the ergospheric accretion region have been visualized in three dimensions and much of the article is devoted to a formal classification of the different manifestations of the vertical flux in the Kerr case.

• Research Organization: Laboratory for Laser Energetics, University of Rochester
• Sponsoring Organization: USDOE
• DOE Contract Number: FC52-08NA28302
• OSTI ID: 964985
• Report Number(s): DOE/NA/28302-908; 2008-173; 1891
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Vol. 704
• Country of Publication: United States
• Language: English

Related Subjects

MHD
accretion
accretion disks
black hole physics
galaxies: active
galaxies: jets