Electric Charge in Interaction with Magnetically Charged Black Holes

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dc.creatorKim, J. H.
dc.creatorMoon, Sei-Hoon
dc.date2007-07-30
dc.date2007-10-02
dc.date.accessioned2026-07-07T11:18:13Z
dc.date.available2026-07-07T11:18:13Z
dc.descriptionWe examine the angular momentum of an electric charge e placed at rest outside a dilaton black hole with magnetic charge Q. The electromagnetic angular momentum which is stored in the electromagnetic field outside the black hole shows several common features regardless of the dilaton coupling strength, though the dilaton black holes are drastically different in their spacetime structure depending on it. First, the electromagnetic angular momentum depends on the separation distance between the two objects and changes monotonically from eQ to 0 as the charge goes down from infinity to the horizon, if rotational effects of the black hole are discarded. Next, as the black hole approaches extremality, however, the electromagnetic angular momentum tends to be independent of the distance between the two objects. It is then precisely $eQ$ as in the electric charge and monopole system in flat spacetime. We discuss why these effects are exhibited and argue that the above features are to hold in widely generic settings including black hole solutions in theories with more complicated field contents, by addressing the no hair theorem for black holes and the phenomenon of field expulsion exhibited by extremal black holes.
dc.description26 pages, 4 figures ; Typos are corrected and a reference is added
dc.identifierhttps://arxiv.org/abs/0707.4183
dc.identifierhttp://arxiv.org/abs/0707.4183
dc.identifierJHEP0709:088,2007
dc.identifierdoi:10.1088/1126-6708/2007/09/088
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193271
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleElectric Charge in Interaction with Magnetically Charged Black Holes
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