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9 papers · 2 filters
Primordial black holes and gravitational waves in nonstandard cosmologies
Sukannya Bhattacharya, Subhendra Mohanty, Priyank Parashari
For primordial black holes (PBHs) to form a considerable fraction of cold dark matter, the required amplitude of primordial scalar perturbations is quite large ($P_ζ(k) \sim 10^{-2…
Inflation models in the light of self-interacting sterile neutrinos
Arindam Mazumdar, Subhendra Mohanty, Priyank Parashari
Short baseline neutrino experiments, like LSND and MiniBooNE experiments, pointed towards the existence of eV mass scale sterile neutrinos. To reconcile sterile neutrinos with cosm…
Magnetic fields in a hot dense neutrino plasma and the Gravitational Waves
Arun Kumar Pandey, Pravin Kumar Natwariya, Jitesh R Bhatt
In the present work, we have studied the spectrum of the primordial gravitational waves due to magnetic instability in the presence of neutrino asymmetry. The magnetic instability…
Formation of Primordial Black Holes from Warm Inflation
Richa Arya
Primordial Black Holes (PBHs) serve as a unique probe to the physics of the early Universe, particularly inflation. In light of this, we study the formation of PBHs by the collapse…
Probing the era of reheating for reconstructed inflationary potential in the RS II braneworld
Sukannya Bhattacharya, Kumar Das, Mayukh R. Gangopadhyay
We analyse the epoch of reheating after an inflationary phase in the Randal Sundrum(RS) Type- braneworld, where we did not consider any particular model of inflation, but r…
Lightening the Dark Matter from its Viscosity and Explanation of EDGES Anomaly
Arvind Kumar Mishra
We study the visible photon production from the viscous dissipation of the dark matter (DM) fluid. The visible photon production depends on the magnitude of the dark matter viscosi…