期刊
PHYSICS LETTERS B
卷 774, 期 -, 页码 130-134出版社
ELSEVIER
DOI: 10.1016/j.physletb.2017.09.048
关键词
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资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), in Brazil
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), in Brazil
- Engineering and Physical Sciences Research Council (EPSRC) [EP/M025802/1]
- Science and Technology Facilities Council (STFC) [ST/L000520/1]
- Engineering and Physical Sciences Research Council [EP/M025802/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/L000520/1, ST/J000418/1, ST/P000800/1] Funding Source: researchfish
- EPSRC [EP/M025802/1] Funding Source: UKRI
- STFC [ST/P000800/1, ST/L000520/1, ST/J000418/1] Funding Source: UKRI
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 circularly-polarized wave. For the case of on-axis incidence, we introduce an extended 'sine approximation' to quantify the spin-helicity effect in the strong-field regime. (c) 2017 The Author(s). Published by Elsevier B.V.
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