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Black holes and magnetic fields

Published online by Cambridge University Press:  01 August 2006

Jiří Bičák ,
Vladimír Karas  and
Tomáš Ledvinka
Jiří Bičák
Affiliation:
Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, CZ-18000 Prague, Czech Republic email: bicak@mbox.troja.mff.cuni.cz, ledvinka@mbox.troja.mff.cuni.cz
Vladimír Karas
Affiliation:
Astronomical Institute, Academy of Sciences, Boční II, CZ-14131 Prague, Czech Republicvladimir.karas@cuni.cz
Tomáš Ledvinka
Affiliation:
Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, CZ-18000 Prague, Czech Republic email: bicak@mbox.troja.mff.cuni.cz, ledvinka@mbox.troja.mff.cuni.cz
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Abstract

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Stationary axisymmetric magnetic fields are expelled from outer horizons of black holes as they become extremal. Extreme black holes exhibit Meissner effect also within exact Einstein–Maxwell theory and in string theories in higher dimensions. Since maximally rotating black holes are expected to be astrophysically most important, the expulsion of the magnetic flux from their horizons represents a potential threat to an electromagnetic mechanism launching the jets at the account of black-hole rotation.

Keywords

Black hole physics – magnetic fields – galaxies: jets
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. 139 - 144
Copyright
Copyright © International Astronomical Union 2007

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