Variable features in black hole X-ray binaries (BH-XRBs) are observed in different energy
ranges and time-scales. The physical origin of different spectral states in BH-XRBs and their …

We study the time evolution of sub-Keplerian transonic accretion flow on to a non-rotating
black hole using a three-dimensional, inviscid hydrodynamics simulation code. Prior two …

We examine the time delay between radio and X-ray and between narrow radio frequency
flares in Sagittarius A*(Sgr A*), from analyses of the synchrotron, bremsstrahlung, and …

Accretion physics studies the process of gravitational capture of ambient matter by massive
stars. The background processes are very challenging to observe and measure due to the …

We examine time-dependent 2D relativistic radiation magnetohydrodynamic (MHD) flows to
develop the shock oscillation model for the long-term flares of Sagittarius A*(Sgr A*) …

Low angular momentum, general relativistic, axially symmetric accretion of hydrodynamic
fluid onto Schwarzschild black holes may undergo more than one critical transition. To …