| Article | |
| Report number | arXiv:1906.10140 |
| Title | Moving black holes: energy extraction, absorption cross-section and the ring of fire |
| Author(s) | Cardoso, Vitor (Lisbon, CENTRA ; CERN) ; Vicente, Rodrigo (Lisbon, CENTRA) |
| Publication | 2019-10-02 |
| Imprint | 2019-06-24 |
| Number of pages | 6 |
| Note | 6 pages, 3 figures. v2: minor edits and corrections. Added comparison to inverse Compton scattering |
| In: | Phys. Rev. D 100 (2019) 084001 |
| DOI | 10.1103/PhysRevD.100.084001 |
| Subject category | physics.optics ; Other Fields of Physics ; hep-th ; Particle Physics - Theory ; astro-ph.HE ; Astrophysics and Astronomy ; gr-qc ; General Relativity and Cosmology |
| Abstract | We consider the interaction between a plane wave and a (counter-moving) 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\sqrt{3}GM/c^2 and thickness GM/c^2. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: Published by the American Physical Society |
Corresponding record in: Inspire
Registre creat el 2019-06-27, darrera modificació el 2023-12-13
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