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Showing 2026 · gr-qcShow all
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gr-qc2026
Echoes of a hairy black hole from gravitational decoupling
Yi Yang, Ali Ovgun, Gaetano Lambiase +2
We study axial gravitational perturbations of a hairy black hole constructed within the framework of gravitational decoupling and investigate the geometric origin of echo-like late…
gr-qc2026
The perturbation solutions to the Blandford-Znajek mechanism in the Kerr-Sen black hole
Haiyuan Feng, Ziqiang Cai, Rong-Jia Yang +1
We investigate the steady, axisymmetric, force-free magnetosphere of Kerr-Sen black hole (BH) within the framework of the Einstein-Maxwell-dilaton-axion (EMDA) theory. By perturbat…