5 papers
Tracing Ultra Light Axions in Post-reionization, Lyman- and CMB Missions
Debarun Paul, Sourav Pal, Amit Dutta Banik +1
Ultra-light axions (ULAs) are dark matter candidates proposed to resolve the small scale anomalies of the standard cosmological model. Due to their inherent quantum pressure, ULAs…
Neutrino self-interactions in post-reionization era: Lyman-, 21-cm and cross-spectra
Sourav Pal, Supratik Pal
Neutrino self-interactions delay the onset of free-streaming in the early universe, leaving distinct, scale-dependent signatures on the matter power spectrum. We investigate these…
Primordial magnetic fields in the light of upcoming post-EoR Lyman- and 21-cm observations
Arko Bhaumik, Sourav Pal, Supratik Pal
The Lorentz force exerted by a primordial magnetic field (PMF) on the coupled baryon-dark matter system may enhance total matter power at small scales after recombination. In the p…
Redshift-space galaxy bispectrum in presence of massive neutrinos: A multipole expansion approach for Euclid
Sourav Pal, Debanjan Sarkar, Rickmoy Samanta +1
Massive neutrinos imprint distinctive signatures on the evolution of cosmic structures, notably suppressing small-scale clustering. We investigate the impact of massive neutrinos o…
Exploring neutrino interactions in light of present and upcoming galaxy surveys
Sourav Pal, Rickmoy Samanta, Supratik Pal
In the standard cosmological framework, neutrinos begin to free-stream after the weak interaction phase ends in the early universe, at a temperature of approximately $T \sim 1 \, {…