Moving black holes: Energy extraction, absorption cross section, and the ring of fire

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We consider the interaction between a plane wave and a (countermoving) black hole. We show that energy is transferred from the black hole to the wave, giving rise to a negative absorption cross section. Moving black holes absorb radiation and deposit energy in external radiation. Due to this effect, a black hole hole of mass M moving at relativistic speeds in a cold medium will appear to be surrounded by a bright "ring" of diameter 3 root 3 GM/c(2) and thickness similar to GM/c(2).

Original languageEnglish
Article number084001
JournalPhysical Review D
Volume100
Issue number8
Number of pages6
ISSN2470-0010
DOIs
Publication statusPublished - 1 Oct 2019
Externally publishedYes

    Research areas

  • SCALAR WAVES, SCATTERING

ID: 298639872