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gr-qc2026
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…
gr-qc2026
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…
gr-qc2023★ 7 cited
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…