3 papers
gr-qc2025
A note on 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. For the Neves-Saa class of regular black hole solutions, which includes the…
gr-qc2025
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)…
gr-qc2024
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…