Stability and quasinormal modes of black holes in conformal Weyl gravity
In this paper, we first investigate the thermal stability of black holes in conformal Weyl gravity with a comparison with the Schwarzschild black holes. Then, we consider a minimally coupled massive scalar perturbation and calculate the quasinormal modes in asymptotically dS spacetime by employing t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320308315 |
| _version_ | 1818670253625835520 |
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| author | Mehrab Momennia Seyed Hossein Hendi Fatemeh Soltani Bidgoli |
| author_facet | Mehrab Momennia Seyed Hossein Hendi Fatemeh Soltani Bidgoli |
| author_sort | Mehrab Momennia |
| collection | DOAJ |
| description | In this paper, we first investigate the thermal stability of black holes in conformal Weyl gravity with a comparison with the Schwarzschild black holes. Then, we consider a minimally coupled massive scalar perturbation and calculate the quasinormal modes in asymptotically dS spacetime by employing the sixth order WKB approximation and asymptotic iteration method. The deviations from those of the Schwarzschild-dS solutions are obtained and the possibility of the presence of quasi-resonance modes for Weyl black hole solutions is investigated. Finally, we consider a massless scalar perturbation in the background of asymptotically AdS solutions and calculate the quasinormal modes by using the pseudospectral method. The effects of the free parameter of the theory on the quasinormal modes are studied and deviations from those of the Schwarzschild-AdS black holes are investigated. The imaginary part of quasinormal frequencies in AdS spacetime is the time scale of a thermal state (in the conformal field theory) to approach thermal equilibrium. |
| first_indexed | 2024-12-17T07:05:10Z |
| format | Article |
| id | doaj.art-03c2e0e3c5814df48c97970f28ba5f9d |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-17T07:05:10Z |
| publishDate | 2021-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-03c2e0e3c5814df48c97970f28ba5f9d2022-12-21T21:59:12ZengElsevierPhysics Letters B0370-26932021-02-01813136028Stability and quasinormal modes of black holes in conformal Weyl gravityMehrab Momennia0Seyed Hossein Hendi1Fatemeh Soltani Bidgoli2Department of Physics, School of Science, Shiraz University, Shiraz 71454, Iran; Biruni Observatory, School of Science, Shiraz University, Shiraz 71454, IranDepartment of Physics, School of Science, Shiraz University, Shiraz 71454, Iran; Biruni Observatory, School of Science, Shiraz University, Shiraz 71454, Iran; Canadian Quantum Research Center, 204-3002 32 Ave, Vernon, BC V1T 2L7 Canada; Corresponding author.Department of Physics, School of Science, Shiraz University, Shiraz 71454, Iran; Biruni Observatory, School of Science, Shiraz University, Shiraz 71454, IranIn this paper, we first investigate the thermal stability of black holes in conformal Weyl gravity with a comparison with the Schwarzschild black holes. Then, we consider a minimally coupled massive scalar perturbation and calculate the quasinormal modes in asymptotically dS spacetime by employing the sixth order WKB approximation and asymptotic iteration method. The deviations from those of the Schwarzschild-dS solutions are obtained and the possibility of the presence of quasi-resonance modes for Weyl black hole solutions is investigated. Finally, we consider a massless scalar perturbation in the background of asymptotically AdS solutions and calculate the quasinormal modes by using the pseudospectral method. The effects of the free parameter of the theory on the quasinormal modes are studied and deviations from those of the Schwarzschild-AdS black holes are investigated. The imaginary part of quasinormal frequencies in AdS spacetime is the time scale of a thermal state (in the conformal field theory) to approach thermal equilibrium.http://www.sciencedirect.com/science/article/pii/S0370269320308315 |
| spellingShingle | Mehrab Momennia Seyed Hossein Hendi Fatemeh Soltani Bidgoli Stability and quasinormal modes of black holes in conformal Weyl gravity Physics Letters B |
| title | Stability and quasinormal modes of black holes in conformal Weyl gravity |
| title_full | Stability and quasinormal modes of black holes in conformal Weyl gravity |
| title_fullStr | Stability and quasinormal modes of black holes in conformal Weyl gravity |
| title_full_unstemmed | Stability and quasinormal modes of black holes in conformal Weyl gravity |
| title_short | Stability and quasinormal modes of black holes in conformal Weyl gravity |
| title_sort | stability and quasinormal modes of black holes in conformal weyl gravity |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320308315 |
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