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10 papers · 2 filters
Effect of matter geometry on low angular momentum black hole accretion in the Kerr metric
Pratik Tarafdar, Deepika B. Ananda, Sankhashubhra Nag +1
This work illustrates how the formation of energy-preserving shocks for polytropic accretion and temperature-preserving shocks for isothermal accretion are influenced by various ge…
Images and Spectral Properties of Two Component Advective Flows Around Black Holes: Effects of Photon Bending
Arka Chatterjee, Sandip K. Chakrabarti, Himadri Ghosh
Two component advective flow (TCAF) successfully explains spectral and timing properties of black hole candidates. We study the nature of photon trajectories in the vicinity of a S…
Estimation of Mass of Compact Object in H 1743-322 from 2010 and 2011 Outbursts using TCAF Solution and Spectral Index - QPO Frequency Correlation
Aslam Ali Molla, Sandip K. Chakrabarti, Dipak Debnath +1
The well known black hole candidate H~1743-322 exhibited temporal and spectral variabilities during several outbursts. Daily variation of the accretion rates and the flow geometry…
Temporal variability from the two-component advective flow solution and its observational evidence
Broja G. Dutta, Sandip K. Chakrabarti
In the propagating oscillatory shock model, the oscillation of the post-shock region, i.e., the Compton cloud, causes the observed low-frequency quasi-periodic oscillations (QPOs).…
Smearing of mass accretion rate variation by viscous processes in accretion disks in compact binary systems
Arindam Ghosh, Sandip Kumar Chakrabarti
Variation of mass supply rate from the companion can be smeared out by viscous processes inside an accretion disk. By the time the flow reaches the inner edge, the variation in X-r…
Viscosity parameter in dissipative accretion flows with mass outflow around black holes
Shreeram Nagarkoti, Sandip K. Chakrabarti
Numerical hydrodynamic simulation of inviscid and viscous flows have shown that significant outflows could be produced from the CENtrifugal pressure supported BOundary Layer or CEN…