191 citations · 2.2k across the 81 of their papers we have counts for
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Michel accretion of a polytropic fluid with adiabatic index gamma > 5/3: Global flows versus homoclinic orbits
Eliana Chaverra, Patryk Mach, Olivier Sarbach
We analyze the properties of a polytropic fluid which is radially accreted into a Schwarzschild black hole. The case where the adiabatic index gamma lies in the range 1 < gamma <=…
Quasi-normal acoustic oscillations in the transonic Bondi flow
Eliana Chaverra, Olivier Sarbach
In recent work, we analyzed the dynamics of spherical and nonspherical acoustic perturbations of the Michel flow, describing the steady radial accretion of a relativistic perfect f…
Shadow of a naked singularity
Néstor Ortiz, Olivier Sarbach, Thomas Zannias
We analyze the redshift suffered by photons originating from an external source, traversing a collapsing dust cloud and finally being received by an asymptotic observer. In additio…
On the behaviour of non-radial null geodesics in self-similar Tolman-Bondi collapse
Néstor Ortiz, Olivier Sarbach, Thomas Zannias
Motivated by recent work on the structure of the singularity in inhomogeneous Tolman-Bondi collapse models, we investigate the behaviour of null geodesics in the particular case wh…
Radial accretion flows on static spherically symmetric black holes
Eliana Chaverra, Olivier Sarbach
We analyze the steady radial accretion of matter into a nonrotating black hole. Neglecting the self-gravity of the accreting matter, we consider a rather general class of static, s…
Quasi-normal acoustic oscillations in the Michel flow
Eliana Chaverra, Manuel D. Morales, Olivier Sarbach
We study spherical and nonspherical linear acoustic perturbations of the Michel flow, which describes the steady radial accretion of a perfect fluid into a nonrotating black hole.…