73 citations · 314 across the 16 of their papers we have counts for
16 papers
Transient Early Dark Energy-Like Dynamics as a Mechanism for Enhanced Early Structure Formation in the JWST Era
Abhik Bhattacharjee, Amlan Chakraborty, Subinoy Das +2
The discovery of massive galaxies at redshifts by the James Webb Space Telescope (JWST) has renewed interest in cosmological mechanisms capable of enhancing early stru…
Lyα forest bounds on sterile neutrino production via neutrino self-interactions
Priyank Parashari, Vera Gluscevic, Yue Zhang +3
Sterile neutrinos in the keV mass range have long been considered a well-motivated dark matter (DM) candidate. In this work, we explore a sterile neutrino production mechanism thro…
Forecasting 21-cm power spectrum sensitivity to dark Matter-baryon scattering
Aryan Rahimieh, Priyank Parashari, Vera Gluscevic
We explore the potential of upcoming 21-cm interferometric observations to probe interacting dark matter (IDM). We focus on scenarios where the dark matter-baryon scattering cross-…
Sensitivity of the Global 21-cm Signal to Dark Matter-Baryon Scattering
Aryan Rahimieh, Priyank Parashari, Rui An +3
With current and upcoming experiments on the horizon, the global 21-cm signal can open up new avenues for probing dark matter (DM) physics at redshifts that are otherwise inaccessi…
Probing the cosmic sterile-neutrino background with IceCube
Bhavesh Chauhan, Priyank Parashari
In this paper, we take a close look at the interaction between the TeV--PeV energy astrophysical neutrinos and a hypothetical cosmic sterile-neutrino background. These interactions…
Hunting Primordial Black Hole Dark Matter in Lyman- Forest
Akash Kumar Saha, Abhijeet Singh, Priyank Parashari +1
A very pressing question in contemporary physics is the identity of Dark Matter (DM). Primordial Black Holes (PBHs) are one of the most well-motivated DM candidates. Light PBHs hav…
First Search for High-Energy Neutrino Emission from Galaxy Mergers
Subhadip Bouri, Priyank Parashari, Mousumi Das +1
The exact sources of high-energy neutrinos detected by the IceCube neutrino observatory still remain a mystery. For the first time, this work explores the hypothesis that galaxy me…
Primordial power spectrum in light of JWST observations of high redshift galaxies
Priyank Parashari, Ranjan Laha
Early data releases of JWST have revealed several high redshift massive galaxy candidates by photometry, and some of them have been confirmed spectroscopically. We study their impl…
Bounds on ultralight bosons from the Event Horizon Telescope observation of Sgr A
Akash Kumar Saha, Priyank Parashari, Tarak Nath Maity +3
Recent observation of Sagittarius A (Sgr A) by the Event Horizon Telescope (EHT) collaboration has uncovered various unanswered questions in black hole (BH) physics. Beside…
Evidence of dark energy in different cosmological observations
Arindam Mazumdar, Subhendra Mohanty, Priyank Parashari
The idea of a negative-pressure dark energy component in the Universe which causes an accelerated expansion in the late Universe has deep implications in models of field theory and…
Flavour specific neutrino self-interaction: tension and IceCube
Arindam Mazumdar, Subhendra Mohanty, Priyank Parashari
Self-interaction in the active neutrinos is studied in the literature to alleviate the tension. Similar self-interaction can also explain the observed dips in the flux of the…
Implications of the NANOGrav result on primordial gravitational waves in nonstandard cosmologies
Sukannya Bhattacharya, Subhendra Mohanty, Priyank Parashari
Recently, the NANOGrav collaboration has reported evidence for a common-spectrum stochastic process, which might be interpreted as the first ever detection of stochastic gravitatio…
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…
Testing Dark energy models in the light of tension
Gaetano Lambiase, Subhendra Mohanty, Ashish Narang +1
It has been pointed out that there exists a tension in measurement between CMB and LSS observation. In this paper we show that observations can be used to test…
Bounds on Neutrino Mass in Viscous Cosmology
Sampurn Anand, Prakrut Chaubal, Arindam Mazumdar +2
Effective field theory of dark matter fluid on large scales predicts the presence of viscosity of the order of . It has been shown that this magnitude of viscosi…