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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Black hole binaries: Ergoregions, photon surfaces, wave scattering, and quasinormal modes

Texto completo
Autor(es):
Assumpcao, Thiago [1] ; Cardoso, Vitor [2, 3, 4] ; Ishibashi, Akihiro [5, 6] ; Richartz, Mauricio [1] ; Zilhao, Miguel [3]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Fed ABC UFABC, Ctr Matemat Comp & Cognicao, BR-09210170 Santo Andre, SP - Brazil
[2] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5 - Canada
[3] Univ Lisbon, Inst Super Tecn, Dept Fis, CENTRA, Ave Rovisco Pais 1, P-1049 Lisbon - Portugal
[4] CERN, Theoret Phys Dept, CH-1211 Geneva 23 - Switzerland
[5] Kindai Univ, Dept Phys, Higashiosaka, Osaka 5778502 - Japan
[6] Kindai Univ, Res Inst Sci & Technol, Higashiosaka, Osaka 5778502 - Japan
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 98, n. 6 SEP 18 2018.
Citações Web of Science: 3
Resumo

Closed photon orbits around isolated black holes are related to important aspects of black hole physics, such as strong lensing, absorption cross section of null particles and the way that black holes relax through quasinormal ringing. When two black holes are present-such as during the inspiral and merger events of interest for gravitational-wave detectors-the concept of closed photon orbits still exist, but its properties are basically unknown. With these applications in mind, we study here the closed photon orbits of two different static black hole binaries. The first one is the Majumdar-Papapetrou geometry describing two extremal, charged black holes in equilibrium, while the second one is the double sink solution of fluid dynamics, which describes (in a curved-spacetime language) two ``dumb{''} holes. For the latter solution, we also characterize its dynamical response to external perturbations and study how it relates to the photon orbits. In addition, we compute the ergoregion of such spacetime and show that it does not coincide with the event horizon. (AU)

Processo FAPESP: 17/10641-4 - Superradiância e estabilidade em sistemas não-axissimétricos
Beneficiário:Thiago Assumpção
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
Processo FAPESP: 16/00384-1 - Buracos negros: espalhamento, superradiância e estabilidade
Beneficiário:Thiago Assumpção
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 13/09357-9 - Física e geometria do espaço-tempo
Beneficiário:Alberto Vazquez Saa
Linha de fomento: Auxílio à Pesquisa - Temático