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Transonic Behaviour and Stability Analysis of Quasi-viscous Black Hole Accretion by Ananda, Deepika B.; Chaudhury, Soumini; Das, Tapas K.; Maity, Ishita; Nag, Sankhasubhra is a scholarly article available to read on EtoBox.

What is Transonic Behaviour and Stability Analysis of Quasi-viscous Black Hole Accretion about?

Analytical studies of black hole accretion usually presumes the stability of the stationary transonic configuration. Various authors in the past several decades demonstrated the validity of such an assumption for inviscid hydrodynamic flow. Inviscid approximation is a reasonable approach for low angular momentum advection dominated flow in connection to certain supermassive black holes at the centres of the galaxies (including our own) fed from a number of stellar donors. Introduction of a weak viscosity, as a first order linear correction involving the viscosity parameter, however, may sometimes provide a more detail understanding of the observed black hole spectra. The transonic behaviour of the stationary solutions have been studied for the aforementioned quasi-viscous accretion for all possible geometric configurations of axisymmetric flow. For a sufficiently low range of the viscosity parameter, transonic solutions containing one or three critical points have been found for allowed ranges in the astrophysical parameters under the post-Newtonian pseudo-Schwarzschild scheme. With the introduction of such viscosity parameter, the only feasible critical points are of saddle and sp

Author

Ananda, Deepika B.; Chaudhury, Soumini; Das, Tapas K.; Maity, Ishita; Nag, Sankhasubhra

Published

2015

Language

EN