35 citations · 134 across the 11 of their papers we have counts for
11 papers
Weak Gravitational Lensing: A Brief Overview
Partha Pratim Basumallick, Saheb Das, Bhaswati Mandal +1
Gravitational lensing constitutes one of the most direct observational manifestations of spacetime curvature and provides a powerful probe of compact astrophysical objects. In this…
Radiative and Jet Signatures of Regular Black Holes in Quantum-Corrected Gravity
Chirantana Bhattacharjee, Subhadip Sau, Avijit Mukherjee
We investigate regular rotating black holes predicted by asymptotically safe gravity, where the Newton constant varies with energy scale and modifies the near horizon geometry. The…
Regular Rotating Black Hole: Probing the boundaries of the Radiative Signatures and Jet Power
Subhadip Sau, John W. Moffat
We perform a detailed observational analysis of several galactic X-ray binaries, focusing on the interplay between black hole spin, jet power, and radiative efficiency within the c…
Photon Ring Dimming as a Signature of Photon-Axion Conversion in Janis-Newman-Winicour Naked Singularity
Ayush Hazarika, Premachand Mahapatra, Subhadip Sau
The possible existence of axions in the universe introduces the intriguing possibility of photon-axion conversion in strong magnetic fields, particularly near compact objects like…
Exploring Axions through the Photon Ring of a Spherically Symmetric Black Hole
Sourov Roy, Pratick Sarkar, Subhadip Sau +1
In this study, we examine the phenomenon of photon axion conversion occurring in the spacetime surrounding a black hole. Specifically, we focus on the potential existence of a magn…
Shadow of regular black hole in scalar-tensor-vector gravity theory
Subhadip Sau, John W. Moffat
We investigate the shadow cast by a regular black hole in scalar-tensor-vector mOdified gravity theory. This black hole differs from a Schwarzschild-Kerr black hole by the dimensio…
Do shadows of Sgr A* and M87* indicate black holes with a magnetic monopole charge?
Indrani Banerjee, Subhadip Sau, Soumitra SenGupta
We study the prospect of Bardeen black holes in explaining the observed shadow of Sgr A* and M87*. Bardeen black holes are regular black holes endowed with a magnetic monopole char…
Signatures of regular black holes from the shadow of Sgr A* and M87*
Indrani Banerjee, Subhadip Sau, Soumitra SenGupta
With the recent release of the black hole image of Sgr A* alongside the earlier image of M87*, one can now really hope to acquire a better understanding of the gravitational physic…
Tidal heating of black holes and exotic compact objects on the brane
Sumanta Chakraborty, Sayak Datta, Subhadip Sau
During the early phase of in-spiral of a binary system, the tidal heating of a compact object due to its companion plays a significant role in the determination of the orbital evol…
Imprints of the Janis-Newman-Winicour spacetime on observations related to shadow and accretion
Subhadip Sau, Indrani Banerjee, Soumitra SenGupta
The final fate of gravitational collapse of massive stars has been a subject of interest for a long time since such a collapse may lead to black holes and naked singularities alike…
Implications of axionic hair on shadow of M87*
Indrani Banerjee, Subhadip Sau, Soumitra SenGupta
Detection of axion field can unfold intriguing facets of our universe in several astrophysical and cosmological scenarios. In four dimensions, such a field owes its origin to the c…