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The Black Hole Grazer

Published online by Cambridge University Press:  25 May 2016

Y. Taniguchi  and
O. Kaburaki
Y. Taniguchi
Affiliation:
Astronomical Institute, Tohoku University Aramaki, Aoba, Sendai 980-77, JAPAN
O. Kaburaki
Affiliation:
Astronomical Institute, Tohoku University Aramaki, Aoba, Sendai 980-77, JAPAN

Extract

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We propose an alternative model for the powering of active galactic nuclei (AGN), based on the assumption that all AGN have experienced mergers. In our model (Kaburaki and Taniguchi 1996; Taniguchi and Kaburaki 1996), a close pair of super-massive black holes (the black hole grazer) orbit one another in a plane roughly perpendicular to the galactic center magnetic field. The orbital motion induces surface charges on the black holes which produce an electric field. This field is strong enough to cause pair creation so that the Roche lobe of the binary system is filled with pair plasmas. Rigid-body rotation of the Roche-lobe magnetosphere drives electrodynamically a powerful synchrotron jet emanating from the center of mass of the binary. Furthermore, a pair of equatorial jets flow from the outer Lagrangian points of the binary system. Although these jets are not so collimated, they interact with the accreting gas ring formed around the orbital plane of the binary, causing broad line regions or H2O maser emission regions (Taniguchi et al. 1996). In addition to the primary jet, two secondary jets are also driven by local accretion disks around the two black holes. The interaction among the primary and the secondary jets may explain detailed jet morphology observed by VLBI facilities.

Type
Session 3: Diagnostics of High Gravity Objects with X- and Gamma Rays
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 449 - 450
Copyright
Copyright © Kluwer 1998 

References

Kaburaki, O., and Taniguchi, Y. (1996) Binary Black-Hole Engines in Active Galactic Nuclei, Physics of Accretion Disks: Advection, Radiation, and Magnetic Field , edited by Kato, S. et al. (Gordon and Breach Science Publishers), 327 Google Scholar
Taniguchi, Y., and Kaburaki, O. (1996) A New Unified Model of Active Galactic Nuclei, The Physics of LINERs in View of Recent Observations, ASP Conf. Ser. 103, 227 Google Scholar
Taniguchi, Y., Kaburaki, O., Ohyama, Y., and Murayama, T. (1996b) A Supermassive Black Hole Binary in NGC 4258, The Physics of LINERs in View of Recent Observations, ASP Conf. Ser. 103, 221 Google Scholar