3 papers
astro-ph.CO2026
Precision Analysis for Using Upcoming Multi-band Gravitational Wave Observations
Setabuddin, Md Riajul Haque, Ratna Koley +1
We investigate how multi-band gravitational wave (GW) observations can constrain the uncertainties in the Hubble parameter () using primordial black holes (PBHs) as possible s…
gr-qc2026
Scalar and Spinor Quasi Normal Modes of a 2D Dilatonic Blackhole
Pabitra Gayen, Ratna Koley
External non-minimally coupled scalar and spinor field perturbations have been studied in a (1 + 1) dimensional dilatonic blackhole spacetime [1, 2]. Exact analytical expressions o…
gr-qc2025
Decoding Horizonless Spacetime: Plasma-Induced Features in a Rotating Wormhole Shadow
Pabitra Gayen, Ratna Koley
We investigate the shadow properties in a recently proposed geometry of a rotating wormhole under realistic astrophysical conditions, particularly in the presence of a cold and non…