| Texto completo | |
| Autor(es): |
de Oliveira, Enesson S.
;
Miranda, Alex S.
;
Zanchin, Vilson T.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 100, n. 6, p. 12-pg., 2019-09-24. |
| Resumo | |
The linear perturbation theory applied to the study of black holes is a traditional and powerful tool to investigate some of the basic properties of these objects, such as the stability of the event horizon, the spectra of quasinormal modes, the scattering and the production of waves in a process of gravitational collapse. Since long ago, the physical interpretation of the linear fluctuations in the metric of spherically symmetric black holes has been established. In a multipolar expansion, it is known that polar perturbations of a monopole type (l = 0) can only increase the black-hole mass, axial perturbations of a dipole type (l = 1) induce a slow rotation in the system, and perturbations with l >= 2 always lead to the production of gravitational waves. However, in relation to the planar Schwarzschild anti-de Sitter black holes (or black branes, for short), there is still no conclusive study on some aspects of the physical meaning of these perturbations. In particular, there is some controversy concerning the polar sector of fluctuations with zero wave numbers (k = 0). Some authors claim that this kind of perturbation causes only a small variation in the black-brane mass parameter, while others obtained also evidence for the existence of gravitational waves associated to such modes. The present study aims to contribute to the resolution of this controversy by revealing the physical meaning of the gravitational perturbations of anti-de Sitter black branes. In this work we use the Chandrasekhar's gauge formalism to evaluate the linear variations in the complex Weyl scalars in terms of the Regge-Wheeler-Zerilli gauge-invariant quantities. Then we use the Szekeres' proposal for the meaning of the Weyl scalars and the Pirani's criterion for the existence of gravitational radiation in order to give a physical interpretation of the black-brane perturbations with arbitrary wave number values. (AU) | |
| Processo FAPESP: | 15/26858-7 - Aspectos clássicos e quânticos das perturbações de buracos negros |
| Beneficiário: | Enesson dos Santos de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |