7 citations · 17 across the 9 of their papers we have counts for
9 papers
Spinning test particles in a weak gravitational wave and the memory effect
Ritwik Acharyya, Shailesh Kumar, Sayan Kar
In this work, we investigate the worldline deviation of spinning test particles in a weak gravitational wave (GW) spacetime. Within the pole-dipole approximation and the Tulczyjew…
Gravitational wave radiation from periodic orbits in regular black holes
Rishav Agrawal, Anjan Kar, Soumya Jana +1
Gravitational wave radiation from periodic orbits in some standard regular black hole spacetimes is studied, primarily using known methods (numerical and analytic). We demonstrate…
Displacement memory in regular black hole spacetimes
Ritwik Acharyya, Sayan Kar
Displacement memory, induced by a wave pulse in a regular black hole spacetime, is studied using geodesic (timelike) separation and geodesic deviation. The presence of the wave pul…
The Penrose process in rotating regular black holes
Anjan Kar, Ayan Dey, Sayan Kar
We investigate the Penrose process of energy extraction in the context of rotating regular black holes. Previously known geometries, as well as a new rotating regular black hole ge…
Quasinormal spectra of a wormhole family: overtone features and a parameter-controlled redshift
Abhisek Barman Maji, Sayan Kar
Though investigated extensively in the past, we take a detailed relook at the study of quasinormal modes (QNM) in a known family of wormholes (ultrastatic (), as well as…
Diverse regular spacetimes using a parametrised density profile
Anjan Kar, Sayan Kar
We explore the construction of diverse regular spacetimes (black holes and defects) in General Relativity (GR) using a generic parametrised density profile (the Dekel-Zhao profile)…
New rotating Lorentzian wormhole spacetime
Anjan Kar, Soumya Jana, Sayan Kar
A rotating version of a known static, spherically symmetric, zero Ricci scalar Lorentzian wormhole is constructed. It turns out that for this given non-rotating geometry, the stand…
Modelling Einstein cluster using Einasto profile
Ritwik Acharyya, Pritam Banerjee, Sayan Kar
We demonstrate a general relativistic approach to model dark matter halos using the Einstein cluster, with the matter stress-energy generated by collisionless particles moving on c…
Shadows of a generic class of spherically symmetric, static spacetimes
Md. Golam Mafuz, Rishank Diwan, Soumya Jana +1
We explore the characteristics of shadows for a general class of spherically symmetric, static spacetimes, which may arise in general relativity or in modified theories of gravity.…