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Generation of shocked hot regions in black hole magnetosphere

Published online by Cambridge University Press:  01 August 2006

Keigo Fukumura ,
Masaaki Takahashi  and
Sachiko Tsuruta
Keigo Fukumura
Affiliation:
NASA/Goddard Space Flight Center, Code 663, Greenbelt, MD 20771, USA email: fukumura@milkyway.gsfc.nasa.gov
Masaaki Takahashi
Affiliation:
Department of Physics and Astronomy, Aichi University of Education, Kariya, Aichi 448-8542, Japan email: takahasi@phyas.aichi-edu.ac.jp
Sachiko Tsuruta
Affiliation:
Department of Physics, Montana State University, Bozeman, MT 59717, USA email: uphst@gemini.msu.montana.edu
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Abstract

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We study magnetohydrodynamic (MHD) standing shocks in ingoing plasmas in a black hole (BH) magnetosphere. We find that low or mid latitude (non-equatorial) standing MHD shocks are both physically possible, creating very hot and/or magnetized plasma regions close to the event horizon. We also investigate the effects of the poloidal magnetic field and the BH spin on the properties of shocks and show that both effects can quantitatively affect the MHD shock solutions. MHD shock formation can be a plausible mechanism for creating high energy radiation region above an accretion disk in AGNs.

Keywords

Black hole physics – magnetohydrodynamics: MHD – shock waves
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 367 - 368
Copyright
Copyright © International Astronomical Union 2007

References

Fukumura, F., Takahashi, M. & Tsuruta, S. 2006, ApJ, submittedGoogle Scholar
Takahashi, M., Rilett, D., Fukumura, K. & Tsuruta, S. 2002, ApJ, 572, 950CrossRefGoogle Scholar
Takahashi, M., Goto, J., Fukumura, K., Rillet, D. & Tsuruta, S. 2006, ApJ, submitted; astro-ph/0511217Google Scholar