17 citations · 33 across the 9 of their papers we have counts for
12 papers
A Standard Ultraviolet Continuum Can Hide Supercritical Accretion in GN-z11
Samik Mitra, Ramananda Santra
The ultraviolet continuum from a high-redshift accreting black hole is routinely used to infer its mass. GN-z11 offers a sharp test of whether that inference is secure. A thin-disk…
Can Isotropic Thermal Conduction Heat One of the Hottest Cool Cores?
Samik Mitra, Ramananda Santra, Norbert Werner
Thermal conduction can act as a heating mechanism for cool-core clusters, yet the same transport must erode any temperature discontinuity it crosses. Ophiuchus permits both effects…
Validating Inverse Fundamental-Plane IMBH Mass Estimates in the SKA/ngVLA Era
Shahram Abbassi, Samik Mitra, Ramananda Santra
The radio/X-ray/black-hole-mass Fundamental Plane (FP) is widely used to estimate masses of accreting intermediate-mass black hole (IMBH) candidates. Its inverse use is justified o…
Low-angular-momentum accretion shocks can power weak-to-moderate X-ray flares from SgrA*
Samik Mitra, Bożena Czerny, Michal Zajaček +1
X-ray flares from Sgr~A* span broad ranges in duration, fluence, and luminosity, but their origin remains unsettled. We test whether standing shocks in low-angular-momentum magneti…
Thermal Stability of Radiation-Pressure-Dominated Accretion Disks Threaded by Net Vertical Magnetic Flux
Shahram Abbassi, Armin Memarian, Samik Mitra
The classical radiation-pressure instability predicts strong thermal variability in luminous black-hole accretion disks, whereas most disk-dominated X-ray binary soft states remain…
Traversing the Galactic Centre in space and time
Michal Zajaček, Bożena Czerny, Martin Mondek +5
The Galactic Center is often identified with its central supermassive black hole, Sgr A*. Yet the black hole governs gravitationally only the innermost few parsecs of the Milky Way…
Properties of low angular momentum general relativistic MHD accretion flows around black holes
Samik Mitra
In this proceeding, we provide a novel approach to study the General Relativistic Magnetohydrodynamic (GRMHD) accretion flows around rotating black holes (BHs). In doing so, we cho…
Low angular momentum general relativistic magnetohydrodynamic accretion flow around rotating black holes with shocks
Samik Mitra, Santabrata Das
We investigate the global structure of general relativistic magneto-hydrodynamic (GRMHD) accretion flows around Kerr black holes containing shock waves, where the disk is threaded…
Accretion flows around spinning compact objects in the post-Newtonian regime
Elham Nazari, Samik Mitra, Shahram Abbassi +1
We present the structure of a low angular momentum accretion flows around rotating compact objects incorporating relativistic corrections up to the leading post-Newtonian order. To…
Global Transonic Solution of Hot Accretion Flow with Thermal Conduction
Samik Mitra, Sayyedeh Masoumeh Ghoreyshi, Amin Mosallanezhad +2
We examine the effect of thermal conduction on the low-angular momentum hot accretion flow (HAF) around non-rotating black holes accreting mass at very low rate. While doing so, we…
On the origin of core radio emissions from black hole sources in the realm of relativistic shocked accretion flow
Santabrata Das, Anuj Nandi, C. S. Stalin +5
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 th…
Study of general relativistic magnetohydrodynamic accretion flow around black holes
Samik Mitra, Debaprasad Maity, Indu Kalpa Dihingia +1
We present a novel approach to study the global structure of steady, axisymmetric, advective, geometrically thin, magnetohydrodynamic (MHD) accretion flow around black holes in ful…