Sandip K. Chakrabarti

Spectral Properties of Accretion Disks around Galactic and Extragalactic Black Holes

We study the spectral properties of a very general class of accretion disks which can be decomposed into three distinct components apart from a shock at

Theory of transonic astrophysical flows

r=r_s

Standing Rankine-Hugoniot shocks in the hybrid model flows of the black hole accretion and winds

: (1) An optically thick Keplerian disk on the equatorial plane (

Resonance oscillation of radiative shock waves in accretion disks around compact objects

r>r_s

Grand unification of solutions of accretion and winds around black holes and neutron stars

), (2) A sub-Keplerian optically thin halo above and below this Keplerian disk

Correlation among Quasi-Periodic Oscillation Frequencies and Quiescent-State Duration in Black Hole Candidate GRS 1915+105.

r>r_s

SIMULATION OF THICK ACCRETION DISKS WITH STANDING SHOCKS BY SMOOTHED PARTICLE HYDRODYNAMICS

and (3) A hot, optically slim,

Zero-Energy Rotating Accretion Flows near a Black Hole

\tau\sim 1

Spiral shocks in accretion disks as a contributor to variability in active galactic nuclei

postshock region

Smoothed particle hydrodynamics confronts theory : formation of standing shocks in accretion disks and winds around black holes

r<r_s\sim 5-10 r_g