136 citations · 516 across the 14 of their papers we have counts for
15 papers
Strong Gravitational Lensing by Compact Object without Cauchy Horizons in Effective Quantum Gravity
Suvankar Paul
In this work, we theoretically investigate strong gravitational lensing effects and evaluate various lensing observables of a static, spherically symmetric solution in the context…
Shadows and thin accretion disk images of the -metric
Rajibul Shaikh, Suvankar Paul, Pritam Banerjee +1
The -metric is a static, axially-symmetric singular solution of the vacuum Einstein's equations without an event horizon. This is a two-parameter family of solutions, generic va…
A stellar constraint on Eddington-inspired Born-Infeld gravity from cataclysmic variable binaries
Pritam Banerjee, Debojyoti Garain, Suvankar Paul +2
Eddington-inspired Born-Infeld gravity is an important modification of Einstein's general relativity, which can give rise to non-singular cosmologies at the classical level, and av…
Strong gravitational lensing by a strongly naked null singularity
Suvankar Paul
We study strong gravitational lensing in a static, spherically symmetric, naked singularity spacetime, without a photon sphere. The nature of the singularity is found to be lightli…
Constraining modified gravity from tidal phenomena in binary stars
Pritam Banerjee, Debojyoti Garain, Suvankar Paul +2
In beyond-Horndeski theories of gravity, the Vainshtein screening mechanism might only be partially effective inside stellar objects. This results in a modification of the pressure…
Tidal disruption near black holes and their mimickers
Pritam Banerjee, Suvankar Paul, Rajibul Shaikh +1
Black holes and wormholes are solutions of Einstein's field equations, both of which, from afar, look like a central mass. We show here that although at large distances both behave…
Observational signatures of wormholes with thin accretion disks
Suvankar Paul, Rajibul Shaikh, Pritam Banerjee +1
We numerically construct images of thin accretion disks in rotating wormhole backgrounds, for the Kerr-like and the Teo class of wormholes. Our construction is illustrated by two m…
Strong gravitational lensing by wormholes
Rajibul Shaikh, Pritam Banerjee, Suvankar Paul +1
We study strong gravitational lensing by a class of static wormhole geometries. Analytical approaches to the same are developed, and the results differ substantially from strong le…
Analytical approach to strong gravitational lensing from ultracompact objects
Rajibul Shaikh, Pritam Banerjee, Suvankar Paul +1
Strong gravitational lensing from black holes results in the formation of relativistic images, in particular, relativistic Einstein rings. For objects with event horizons, the radi…
Tidal effects away from the equatorial plane in Kerr backgrounds
Pritam Banerjee, Suvankar Paul, Rajibul Shaikh +1
We study tidal effects on self-gravitating Newtonian stars rotating around a Kerr black hole in stable circular orbits away from the equatorial plane. Such cases are exemplified by…
A novel gravitational lensing feature by wormholes
Rajibul Shaikh, Pritam Banerjee, Suvankar Paul +1
Horizonless compact objects with light rings (or photon spheres) are becoming increasingly popular in recent years for several reasons. In this paper, we show that a horizonless ob…
On Strong Gravitational Lensing in Rotating Galactic Space-times
Pritam Banerjee, Suvankar Paul, Tapobrata Sarkar
We study strong gravitational lensing in rotating space-times which can be thought of as realistic galactic models in General Relativity. To this end, using the Newman-Janis algori…
Massless fermions in null Fermi coordinates and an application to analog gravity in -A
Pritam Banerjee, Suvankar Paul, Tapobrata Sarkar
Bogoliubov quasiparticles moving in the background of superfluid -A see an apparently curved space-time metric when the background superfluid vacuum is in motion. We s…
Information Geometry in Time Dependent Quantum Systems and the Geometric Phase
Anshuman Dey, Suvankar Paul, Pratim Roy +1
We study information theoretic geometry in time dependent quantum mechanical systems. First, we discuss global properties of the parameter manifold for two level systems exemplifie…
Statistical Analysis based Hypothesis Testing Method in Biological Knowledge Discovery
Md. Naseef-Ur-Rahman Chowdhury, Suvankar Paul, Kazi Zakia Sultana
The correlation and interactions among different biological entities comprise the biological system. Although already revealed interactions contribute to the understanding of diffe…