Description of Pseudo-Newtonian Potential for the Relativistic Accretion Disks around Kerr Black Holes
- B. Mukhopadhyay
- Physics
- 28 May 2002
We present a pseudo-Newtonian potential for accretion disk modeling around a rotating black hole. This potential can describe the general relativistic effects on the accretion disk. As the inclusion…
Bypass to Turbulence in Hydrodynamic Accretion Disks: An Eigenvalue Approach
- B. Mukhopadhyay, N. Afshordi, R. Narayan
- Physics
- 8 December 2004
Cold accretion disks with temperatures below ~3000 K are likely to be composed of highly neutral gas. The magnetorotational instability may cease to operate in such disks, so it is of interest to…
General relativity and relativistic astrophysics
- B. Mukhopadhyay
- Physics
- 1 December 2015
It is shown that Einstein's theory and its modified form, both are necessary to explain modern astrophysical processes, in particular, those related to compact objects.
Bypass to Turbulence in Hydrodynamic Accretion: Lagrangian Analysis of Energy Growth
- N. Afshordi, B. Mukhopadhyay, R. Narayan
- Physics
- 8 December 2004
Despite observational evidence for cold neutral astrophysical accretion disks, the viscous process that may drive the accretion in such systems is not yet understood. While molecular viscosity is too…
Increased serum catalytic iron may mediate tissue injury and death in patients with COVID-19
- V. Chakurkar, M. Rajapurkar, V. Jha
- MedicineScientific Reports
- 4 October 2021
The study shows an association of ferritin and catalytic iron with adverse outcomes in COVID-19, which suggests new pathophysiologic pathways in this disease, also raising the possibility of considering iron chelation therapy.
Prognostic Evaluation of Catalytic Iron in Patients With Acute Coronary Syndromes
- Dylan L. Steen, C. Cannon, D. Morrow
- BiologyClinical Cardiology
- 1 March 2013
Circulating catalytic iron (“free” iron) is that which is not bound to transferrin or ferritin and is available to generate reactive oxygen species that may have deleterious vascular effects.
The Chaotic Behavior of the Black Hole System GRS 1915+105
- R. Misra, K. P. Harikrishnan, B. Mukhopadhyay, G. Ambika, A. Kembhavi
- Physics
- 5 March 2004
A modified nonlinear time series analysis technique, which computes the correlation dimension D2, is used to analyze the X-ray light curves of the black hole system GRS 1915+105 in all 12 temporal…
New mass limit for white dwarfs: super-Chandrasekhar type ia supernova as a new standard candle.
- U. Das, B. Mukhopadhyay
- PhysicsPhysical Review Letters
- 25 January 2013
It is established from a foundational level that the generic mass limit of white dwarfs is 2.58 solar mass, which explains the origin of overluminous peculiar type Ia supernovae and argues for a possible second standard candle.
Strongly magnetized cold degenerate electron gas: Mass-radius relation of the magnetized white dwarf
- U. Das, B. Mukhopadhyay
- Physics
- 5 April 2012
We consider a relativistic, degenerate electron gas at zero temperature under the influence of a strong, uniform, static magnetic field, neglecting any form of interactions. Since the density of…
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