24 citations · 54 across the 16 of their papers we have counts for
Showing 2025Show all
3 papers · 1 filter
astro-ph.CO2025
Probing Axion-Photon conversion via circular polarization imprints in the CMB -mode observations
Ashu Kushwaha, Rajeev Kumar Jain
In the presence of a background magnetic field, axions or axion-like particles (ALPs) can be resonantly converted to photons when their mass is nearly equal to the effective photon…
astro-ph.CO2025
Excursion Set Approach to Primordial Black Holes: Cloud-in-Cloud and Mass Function Revisited
Ashu Kushwaha, Teruaki Suyama
The abundance and mass function of primordial black holes (PBHs) are often estimated using the Press-Schechter (PS) formalism. In the case of halo formation, the PS formalism suffe…
astro-ph.CO2025
Constraining circular polarization of high-frequency gravitational waves with CMB
Ashu Kushwaha, Rajeev Kumar Jain
Circular polarization in the cosmic microwave background (CMB) offers a promising probe of the parity-violating physics of the early universe. In this paper, we propose a novel met…