93 citations · 379 across the 10 of their papers we have counts for
10 papers
Extended mass distribution of PBHs during QCD phase transition: SGWB and mini-EMRIs
Nilanjandev Bhaumik, Huai-Ke Guo, Si-Jiang Liu
Primordial black holes (PBHs) are one of the most important tracers of cosmic history. In this work, we investigate the formation of PBHs around the time of the QCD phase transitio…
Memory burden effect mimics reheating signatures on SGWB from ultra-low mass PBH domination
Nilanjandev Bhaumik, Md Riajul Haque, Rajeev Kumar Jain +1
Ultra-low mass primordial black holes (PBH), briefly dominating the expansion of the universe, would leave detectable imprints in the secondary stochastic gravitational wave backgr…
Constraining the history of reheating with the NANOGrav 15-year data
Suvashis Maity, Nilanjandev Bhaumik, Md Riajul Haque +2
Over the last few years, primordial black holes (PBHs) have emerged as a strong candidate for cold dark matter. A significant number of PBHs are produced when the strength of the p…
Ultra-low mass PBHs in the early universe can explain the PTA signal
Nilanjandev Bhaumik, Rajeev Kumar Jain, Marek Lewicki
Pulsar Timing Array collaborations have recently announced the discovery of a stochastic gravitational wave background (SGWB) at nanohertz frequencies. We analyze the GW signals fr…
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…
Doubly peaked induced stochastic gravitational wave background : Testing baryogenesis from primordial black holes
Nilanjandev Bhaumik, Anish Ghoshal, Marek Lewicki
Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the univers…
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…
Small scale induced gravitational waves from primordial black holes, a stringent lower mass bound, and the imprints of an early matter to radiation transition
Nilanjandev Bhaumik, Rajeev Kumar Jain
In all inflationary scenarios of primordial black holes (PBH) formation, amplified scalar perturbations inevitably accompany an induced stochastic gravitational waves background (I…
Primordial black holes dark matter from inflection point models of inflation and the effects of reheating
Nilanjandev Bhaumik, Rajeev Kumar Jain
We study the generation of primordial black holes (PBH) in a single field inflection point model of inflation wherein the effective potential is expanded up to the sextic order and…
Interior volume of () dimensional Schwarzschild black hole
Nilanjandev Bhaumik, Bibhas Ranjan Majhi
We calculate the maximum interior volume, enclosed by the event horizon, of a ()-dimensional Schwarzschild black hole. Taking into account the mass change due to Hawking radia…