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@article{36736, author = {Toshmatov, Bobir and Stuchlík, Zdeněk and Ahmedov, Bobomurot and Malafarina, Daniele}, article_number = {6}, doi = {http://dx.doi.org/10.1103/PhysRevD.99.064043}, keywords = {black holes; perturbations; nonlinear electrodynamics; quasinormal frequencies}, language = {eng}, issn = {2470-0010}, journal = {Physical Review D}, title = {Relaxations of perturbations of spacetimes in general relativity coupled to nonlinear electrodynamics}, url = {https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.064043}, volume = {99}, year = {2019} }
TY - JOUR ID - 36736 AU - Toshmatov, Bobir - Stuchlík, Zdeněk - Ahmedov, Bobomurot - Malafarina, Daniele PY - 2019 TI - Relaxations of perturbations of spacetimes in general relativity coupled to nonlinear electrodynamics JF - Physical Review D VL - 99 IS - 6 SP - "064043-1"-"064043-9" EP - "064043-1"-"064043-9" SN - 24700010 KW - black holes KW - perturbations KW - nonlinear electrodynamics KW - quasinormal frequencies UR - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.064043 L2 - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.064043 N2 - Three well-known exact regular solutions of general relativity coupled to nonlinear electrodynamics (NED), namely the Maxwellian, Bardeen, and Hayward regular spacetimes, which can describe either a regular black hole or a geometry without horizons, have been considered. Relaxation times for the scalar, electromagnetic (EM) and gravitational perturbations of black holes and no-horizon spacetimes have been estimated in comparison with the ones of the Schwarzschild and Reissner-Nordstrom spacetimes. It has been shown that the considered geometries in general relativity coupled to the NED have never-vanishing circular photon orbits, and on account of this fact, these spacetimes always oscillate the EM perturbations with quasinormal frequencies. Moreover, we have shown that the EM perturbations in the eikonal regime can be a powerful tool to confirm (i) that the light rays do not follow null geodesics in the NED by the relaxation rates and (ii) if the underlying solution has a correct weak field limit to the Maxwell electrodynamics by the angular velocity of the circular photon orbit. ER -
TOSHMATOV, Bobir, Zdeněk STUCHLÍK, Bobomurot AHMEDOV and Daniele MALAFARINA. Relaxations of perturbations of spacetimes in general relativity coupled to nonlinear electrodynamics. \textit{Physical Review D}. 2019, vol.~99, No~6, p.~''064043-1''-''064043-9'', 9 pp. ISSN~2470-0010. Available from: https://dx.doi.org/10.1103/PhysRevD.99.064043.
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