Constraining spherically symmetric metrics by the gap between photon rings
F Aratore, OY Tsupko, V Perlick - Physical Review D, 2024 - APS
Gravitational lensing of luminous matter that surrounds a black hole or some other
sufficiently compact object produces an infinite sequence of images. Besides the direct (or …
sufficiently compact object produces an infinite sequence of images. Besides the direct (or …
Prospects for future experimental tests of gravity with black hole imaging: Spherical symmetry
Astrophysical black holes (BHs) are universally expected to be described by the Kerr metric,
a stationary, vacuum solution of general relativity (GR). Indeed, by imaging M87* and Sgr A …
a stationary, vacuum solution of general relativity (GR). Indeed, by imaging M87* and Sgr A …
Bounds for Lyapunov exponent of circular light orbits in black holes
E Gallo, T Mädler - arXiv preprint arXiv:2412.10328, 2024 - arxiv.org
Chaotic systems near black holes satisfy a universal bound, $\lambda\leq\kappa_H $ linking
the Lyapunov coefficient $\lambda $ associated with unstable orbits to surface gravity …
the Lyapunov coefficient $\lambda $ associated with unstable orbits to surface gravity …