Study of radio waves signals of dark matter by Gravitating systems
Black hole scattering: the relation between the time and the frequency domains
Gravitational radiation from compact objects and black holes: some important problems
| Full text | |
| Author(s): |
Assumpcao, Thiago
[1]
;
Cardoso, Vitor
[2, 3, 4]
;
Ishibashi, Akihiro
[5, 6]
;
Richartz, Mauricio
[1]
;
Zilhao, Miguel
[3]
Total Authors: 5
|
| Affiliation: | [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
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Physical Review D; v. 98, n. 6 SEP 18 2018. |
| Web of Science Citations: | 5 |
| Abstract | |
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) | |
| FAPESP's process: | 17/10641-4 - Superradiance and stability in non-axisymmetric systems |
| Grantee: | Thiago Assumpção |
| Support type: | Scholarships abroad - Research Internship - Master's degree |
| FAPESP's process: | 16/00384-1 - Black holes: scattering, superradiance and stability |
| Grantee: | Thiago Assumpção |
| Support type: | Scholarships in Brazil - Master |
| FAPESP's process: | 13/09357-9 - Physics and geometry of spacetime |
| Grantee: | Alberto Vazquez Saa |
| Support type: | Research Projects - Thematic Grants |