Journal
PHYSICAL REVIEW D
Volume 96, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.064028
Keywords
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Funding
- Silesian University [SGS/14/2016]
- Albert Einstein Centre for Gravitation and Astrophysics under the Czech Science Foundation [14-37086G]
- National Natural Science Foundation of China (NSFC) [U1531117]
- Fudan University [IDH1512060]
- Alexander von Humboldt Foundation
- Uzbekistan Agency for Science and Technology [VA-FA-F-2-008]
- Abdus Salam International Centre for Theoretical Physics [OEA-NT-01]
- Volkswagen Stiftung [86 866]
- Silesian University in Opava
- National University of Uzbekistan
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We study scalar and electromagnetic perturbations of a family of nonsingular nonrotating black hole spacetimes that are solutions in a large class of conformally invariant theories of gravity. The effective potential for scalar perturbations depends on the exact form of the scaling factor. Electromagnetic perturbations do not feel the scaling factor, and the corresponding quasinormal mode spectrum is the same as in the Schwarzschild metric. We find that these black hole metrics are stable under scalar and electromagnetic perturbations. Assuming that the quasinormal mode spectrum for scalar perturbations is not too different from that for gravitational perturbations, we can expect that the calculation of the quasinormal mode spectrum and the observation with gravitational wave detectors of quasinormal modes from astrophysical black holes can constrain the scaling factor and test these solutions.
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