67 citations · 162 across the 19 of their papers we have counts for
9 papers · 1 filter
Viscosity effects on the shadow of a non-rotating black hole
Sayantani Lahiri, Sergio Gimeno-Soler, Alejandro Cruz-Osorio +2
We study the effect of shear viscosity in stationary magnetized accretion tori on synthetic images of non-rotating black hole shadows. Shear viscosity and spacetime-curvature contr…
Equilibrium models of Weyssenhoff spin fluid accretion tori around Kerr black holes
Sergio Gimeno-Soler, Sayantani Lahiri, Claus Lämmerzahl
The construction of equilibrium models of accretion disks around compact objects has become a highly relevant topic in the recent times, thanks to the current understanding that in…
Stationary equilibrium torus supported by Weyssenhoff ideal spin fluid in Schwarzschild spacetime -- I: Case of constant specific angular momentum distribution
Sayantani Lahiri, Claus Laemmerzahl
We consider a non-self-gravitating geometrically thick torus described by Weyssenhoff ideal spin fluid in a black hole spacetime. The Weyssenhof spin fluid shares the same symmetri…
Sustaining quasi de-Sitter inflation with bulk viscosity
Sayantani Lahiri, Luciano Rezzolla
We here investigate bulk-viscosity driven quasi de-Sitter inflation, that is, the period of accelerated expansion in the early universe during which , with …
Stationary models of magnetized viscous tori around a Schwarzschild black hole
Sayantani Lahiri, Sergio Gimeno-Soler, José A. Font +1
We present stationary solutions of magnetized, viscous thick accretion disks around a Schwarzschild black hole. We assume that the tori are not self-gravitating, are endowed with a…
A toy model of viscous relativistic geometrically thick disk in Schwarzschild geometry
Sayantani Lahiri, Claus Lämmerzahl
In this earliest study of thick accretion disks with viscosity effects, we construct stationary solutions of a relativistic geometrically thick accretion disk in the Schwarzschild…