102 citations · 296 across the 7 of their papers we have counts for
7 papers
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…
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…
Strong gravitational lensing and black hole quasinormal modes: Towards a semiclassical unified description
Bernard Raffaelli
We examine in a semiclassical framework the deflection function of strong gravitational lensing, for static and spherically symmetric black holes, endowed with a photon sphere. Fro…
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…
Resonance and absorption spectra of the Schwarzschild black hole for massive scalar perturbations: a complex angular momentum analysis
Yves Décanini, Antoine Folacci, Bernard Raffaelli
We reexamine some aspects of scattering by a Schwarzschild black hole in the framework of complex angular momentum techniques. More precisely, we consider, for massive scalar pertu…
Fine structure of high-energy absorption cross sections for black holes
Yves Décanini, Antoine Folacci, Bernard Raffaelli
The high-energy absorption cross section of the Schwarzschild black hole is well approximated, in the eikonal regime, by the sum of two terms: the geometrical cross section of the…
Unstable circular null geodesics of static spherically symmetric black holes, Regge poles and quasinormal frequencies
Yves Décanini, Antoine Folacci, Bernard Raffaelli
We consider a wide class of static spherically symmetric black holes of arbitrary dimension with a photon sphere (a hypersurface on which a massless particle can orbit the black ho…