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gr-qc2026
Optical Appearance and Ringdown of Black Holes in a Kalb Ramond Field Coupled to Perfect Fluid Dark Matter
Qi-Qi Liang, Zi-Qiang Cai, Dong Liu +1
This paper investigates the optical and dynamical properties of a static spherically symmetric black hole in the presence of a Kalb--Ramond (KR) field coupled to perfect fluid dark…
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…