Absorption of electromagnetic and gravitational waves by Kerr black holes

Abstract

We calculate the absorption cross section for planar waves incident upon Kerr black holes, and present a unified picture for scalar, electromagnetic and gravitational waves. We highlight the spin-helicity effect that arises from a coupling between the rotation of the black hole and the helicity of a circularlypolarized wave. For the case of on-axis incidence, we introduce an extended ‘sinc approximation’ to quantify the spin-helicity effect in the strong-field regime.

Metadata

Authors/Creators:

Leite, L.C.S.
Dolan, S.R. https://orcid.org/0000-0002-4672-6523
Crispino, L.C.B.

Copyright, Publisher and Additional Information:

© 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

Dates:

Accepted: 17 September 2017
Published (online): 25 September 2017
Published: 10 November 2017

Institution:

The University of Sheffield

Academic Units:

The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)

Funding Information:

Funder	Grant number
ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC)	EP/M025802/1
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL	ST/L000520/1

Depositing User:

Symplectic Sheffield

Date Deposited:

19 Oct 2017 11:21

Last Modified:

19 Oct 2017 11:24

Published Version:

https://doi.org/10.1016/j.physletb.2017.09.048

Status:

Published

Publisher:

Elsevier

Refereed:

Yes

Identification Number:

https://doi.org/10.1016/j.physletb.2017.09.048

CORE (COnnecting REpositories)

CORE (COnnecting REpositories)