Contact. Comparing horizon-scale observations of Sgr A* and M 87* with numerical
simulations has provided considerable insight into their interpretation. Most of these …

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 …

An essential factor for determining the characteristics of an accretion flow is its angular
momentum. According to the angular momentum of the flow, semi-analytical analysis …

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 …

We perform axisymmetric, 2D magnetohydrodynamic simulations to investigate accretion
flows around spinning active galactic nuclei. To mimic the space–time geometry of spinning …

We study the relativistic viscous accretion flows around the Kerr black holes. We present the
governing equations that describe the steady-state flow motion in full general relativity and …

We study the two-temperature magnetized advective accretion flow around the Kerr black
holes (BHs). During accretion, ions are heated up due to viscous dissipation, and when …

We study the relativistic, inviscid, advective accretion flow around the black holes and
investigate a key feature of the accretion flow, namely the shock waves. We observe that 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*) …

We study viscous transonic accretion flows in vertical equilibrium in Kerr geometry. We
employ the pseudo-Kerr formalism that accurately describes transonic flows around Kerr …