6 papers
Transonic behaviour and stability analysis of quasi-viscous black hole accretion
Deepika B. Ananda, Soumini Chaudhury, Tapas K. Das +2
Analytical studies of black hole accretion usually presumes the stability of the stationary transonic configuration. Various authors in the past several decades demonstrated the va…
Development of Secular Instability in Different Disc Models of Black Hole Accretion
Sankhasubhra Nag, Deepika B Ananda, Ishita Maity +1
Analytical treatment of black hole accretion generally presumes the stability of the stationary configuration. Various authors in the past several decades demonstrated the validity…
Towards equation of state of dark energy from quasar monitoring: Reverberation strategy
B. Czerny, K. Hryniewicz, I. Maity +3
High redshift quasars can be used to deduce the distribution of dark energy in the Universe, as a complementary tool to SN Ia. The method is based on determination of the size of t…
Dusty origin of the Broad Line Region in active galaxies
Bozena Czerny, Krzysztof Hryniewicz, Janusz Kaluzny +1
The most characteristic property of active galaxies, including quasars, are prominent broad emission lines. I will discuss an interesting possibility that dust is responsible for t…
Black Hole spin dependence of general relativistic multi-transonic accretion close to the horizon
Tapas K. Das, Sankhasubhra Nag, Swathi Hegde +7
We introduce a novel formalism to investigate the role of the spin angular momentum of astrophysical black holes in influencing the behaviour of low angular momentum general relati…
On Spin Dependence of Relativistic Acoustic Geometry
Hung-Yi Pu, Ishita Maiti, Tapas Kumar Das +1
This work makes the first ever attempt to understand the influence of the black hole background space-time in determining the fundamental properties of the embedded relativistic ac…