27 citations · 40 across the 3 of their papers we have counts for
3 papers
gr-qc2022
The overtone level spacing of a black hole quasinormal frequencies: a fingerprint of a local symmetry
Bernard Raffaelli
The imaginary part of the quasinormal frequencies spectrum for a static and spherically symmetric black hole is analytically known to be equally spaced, both for the highly damped…
gr-qc2021★ 27 cited
Hidden conformal symmetry on the black hole photon sphere
Bernard Raffaelli
We consider a class of static and spherically symmetric black hole geometries endowed with a photon sphere. On the one hand, we show that close to the photon sphere, a massless sca…
gr-qc2013★ 13 cited
A scattering approach to some aspects of the Schwarzschild Black Hole
Bernard Raffaelli
In this paper, we consider a massless field, with spin j, in interaction with a Schwarzschild black hole in four dimensions, focusing mainly our study on the s-wave scattering. Fir…