Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/15005
Title: Testing black hole superradiance with pulsar companions
Author: Rosa, João G.
Keywords: Black hole
Pulsar
Superradiance
Issue Date: 7-Oct-2015
Publisher: Elsevier
Abstract: We show that the magnetic dipole and gravitational radiation emitted by a pulsar can undergo superradiant scattering off a spinning black hole companion. We find that the relative amount of superradiant modes in the radiation depends on the pulsar's angular position relative to the black hole's equatorial plane. In particular, when the pulsar and black hole spins are aligned, superradiant modes are dominant at large angles, leading to an amplification of the pulsar's luminosity, whereas for small angles the radiation is dominantly composed of non-superradiant modes and the signal is attenuated. This results in a characteristic orbital modulation of the pulsar's luminosity, up to the percent level within our approximations, which may potentially yield a signature of superradiant scattering in astrophysical black holes and hence an important test of general relativity.
Peer review: yes
URI: http://hdl.handle.net/10773/15005
DOI: 10.1016/j.physletb.2015.07.063
ISSN: 0370-2693
Appears in Collections:CIDMA - Artigos
GGDG - Artigos

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