Leite, L.C.S., Dolan, S. orcid.org/0000-0002-4672-6523 and Crispino, C.B. (2018) Absorption of electromagnetic plane waves by rotating black holes. Physical Review D, D98. 024046. ISSN 2470-0010
Abstract
We study the absorption of monochromatic electromagnetic plane waves impinging upon a Kerr black hole, in the general case that the direction of incidence is not aligned with the black hole spin axis. We present numerical results that are in accord with low- and high-frequency approximations. We find that circularly polarized waves are distinguished by the black hole spin, with counter-rotating polarizations being more absorbed than co-rotating polarizations. At low frequencies and moderate incidence angles, there exists a narrow parameter window in which superradiant emission in the dipole mode can exceed absorption in the non-superradiant modes, allowing a planar electromagnetic wave to stimulate net emission from a black hole.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 American Physical Society. This is an author-produced version of a paper accepted for publication in Physical Review D. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 08 Aug 2018 13:53 |
Last Modified: | 09 Aug 2018 13:49 |
Published Version: | https://doi.org/10.1103/PhysRevD.98.024046 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevD.98.024046 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:134319 |