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Where is the electric current driven in the Blandford-Znajek process?

Published online by Cambridge University Press:  23 June 2017

Kenji Toma  and
Fumio Takahara
Kenji Toma
Affiliation:
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan; email: [email protected]
Fumio Takahara
Affiliation:
Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan
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Abstract

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The Blandford-Znajek process, the steady electromagnetic energy extraction from a rotating black hole, is widely believed to work for driving relativistic jets, although it is still under debate where the electric current is driven. We address this issue analytically by investigating the time-dependent state in the Boyer-Lindquist and Kerr-Schild coordinate systems. This analysis suggests that a non-ideal magnetohydrodynamic region is required in the time-dependent state, while not in the steady state.

Keywords

black hole physicsMHDplasmasgalaxies: jetsgamma rays: bursts
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 19 - 22
Copyright
Copyright © International Astronomical Union 2017 

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