359 citations · 2k across the 45 of their papers we have counts for
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Distinct signatures of spinning PBH domination and evaporation: doubly peaked gravitational waves, dark relics and CMB complementarity
Nilanjandev Bhaumik, Anish Ghoshal, Rajeev Kumar Jain +1
Ultra-low mass primordial black holes (PBH), which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), can l…
Circumventing the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
Sagarika Tripathy, Debika Chowdhury, H. V. Ragavendra +2
[Abridged] As is well known, in order to generate magnetic fields of observed amplitudes during inflation, the conformal invariance of the electromagnetic field has to be broken by…
Understanding large scale CMB anomalies with the generalized non-minimal derivative coupling during inflation
Yashi Tiwari, Nilanjandev Bhaumik, Rajeev Kumar Jain
We study the observational implications of a class of inflationary models wherein the inflaton is coupled to the Einstein tensor through a generalized non-minimal derivative coupli…
Faint light of old neutron stars and detectability at the James Webb Space Telescope
Shiuli Chatterjee, Raghuveer Garani, Rajeev Kumar Jain +3
Isolated ideal neutron stars (NS) of age yrs exhaust thermal and rotational energies and cool down to temperatures below K. Accretion of particle dark ma…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Invariance of cosmological number counts under disformal transformations
Basundhara Ghosh, Jérémie Francfort, Rajeev Kumar Jain
We investigate whether true physical observables associated with the measurements of large scale structure in the universe are frame-independent. In particular, we study if cosmolo…