165 citations · 2.7k across the 80 of their papers we have counts for
10 papers · 1 filter
Probing astrophysical environment with eccentric extreme mass-ratio inspirals
Mostafizur Rahman, Shailesh Kumar, Arpan Bhattacharyya
The discovery of gravitational waves and black holes has started a new era of gravitational wave astronomy that allows us to probe the underpinning features of gravity and astrophy…
Gravitational Radiation from hyperbolic encounters in the presence of dark matter
Abhishek Chowdhuri, Rishabh Kumar Singh, Kaushik Kangsabanik +1
In this study, we look into binaries undergoing gravitational radiation during a hyperbolic passage. Such hyperbolic events can be a credible source of gravitational waves in futur…
A review on analytical studies in Gravitational Lensing
Abhishek Chowdhuri, Saptaswa Ghosh, Arpan Bhattacharyya
In this study, we review some current studies on Gravitational Lensing for black holes, mainly in the context of general relativity. We mainly focus on the analytical studies relat…
Study of eccentric binaries in Horndeski theory
Abhishek Chowdhuri, Arpan Bhattacharyya
We study the orbital evolution of eccentric binary systems in Horndeski gravity. This particular theory provides a testbed to give insightful comparisons with data. We compute the…
Prospects for determining the nature of the secondaries of extreme mass-ratio inspirals using the spin-induced quadrupole deformation
Mostafizur Rahman, Arpan Bhattacharyya
The measurement of multipole moments of astrophysical objects through gravitational wave (GW) observations provides a novel way to distinguish black holes from other astrophysical…
Ringdown of Charged Compact Objects using Membrane Paradigm
Mostafizur Rahman, Arpan Bhattacharyya
Although the black holes are an integral part of the standard model of astrophysics and cosmology, their existence poses some serious fundamental problems. In recent years, several…
Shadow analysis for rotating black holes in the presence of plasma for an expanding universe
Abhishek Chowdhuri, Arpan Bhattacharyya
We explore the structure of shadow for a Kerr-de Sitter black hole with a non-magnetized, pressureless plasma surrounding it. Specific plasma distributions are considered to separa…
Scalar perturbations of black holes in Jackiw-Teitelboim gravity
Srijit Bhattacharjee, Subhodeep Sarkar, Arpan Bhattacharyya
We study linear scalar perturbations of black holes in two-dimensional (2D) gravity models with a particular emphasis on Jackiw-Teitelboim (JT) gravity. We obtain an exact expressi…
Displacement memory effect near the horizon of black holes
Srijit Bhattacharjee, Shailesh Kumar, Arpan Bhattacharyya
We study the displacement memory effect and its connection with the extended-BMS symmetries near the horizon of black holes. We show there is a permanent shift in the geodesic devi…
Entanglement entropy from surface terms in general relativity
Arpan Bhattacharyya, Aninda Sinha
Entanglement entropy in local quantum field theories is typically ultraviolet divergent due to short distance effects in the neighbourhood of the entangling region. In the context…