BH4 - Gravitational fields with sources: From compact objects to black holes |
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Speaker |
Bassalo Crispino, Luis Carlos |
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Coauthors |
Crispino, Luis C. B.; Dolan, Sam R.; Higuchi, Atsushi; Oliveira, Ednilton S. de |
| Talk Title |
Inferring black hole charge from backscattered electromagnetic radiation |
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Abstract |
We compute the scattering cross section of Reissner-Nordström black holes for the case of a pure electromagnetic incident wave. We describe how scattering is affected by both the conversion of electromagnetic to gravitational radiation, and the parity-dependence of phase shifts induced by the black hole charge. The latter effect creates a helicity-reversed scattering amplitude that is non-zero in the backward direction. We show that, in principle, from the characteristics of the electromagnetic wave scattered in the backward direction it is possible to tell if a static black hole is charged or not. |
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