55 citations · 115 across the 3 of their papers we have counts for
8 papers
Comparison of numerical methods for computing the repeated Compton scattering of photons in isotropic media
Sandeep Kumar Acharya, Jens Chluba, Abir Sarkar
Repeated Compton scattering of photons with thermal electrons is one of the fundamental processes at work in many astrophysical plasma. Solving the exact evolution equations is har…
Constraints on of high energy non-thermal neutrino injections upto from CMB spectral distortions and abundance of light elements
Sandeep Kumar Acharya, Rishi Khatri
High energy neutrinos and anti-neutrinos ( 100 GeV) can inject energetic electromagnetic particles into the baryon-photon plasma in the high redshift universe through elec…
Thermalization of large energy release in the early Universe
Jens Chluba, Andrea Ravenni, Sandeep Kumar Acharya
Spectral distortions of the cosmic microwave background (CMB) provide a unique tool for learning about the early phases of cosmic history, reaching deep into the primordial Univers…
CMB and BBN constraints on evaporating primordial black holes revisited
Sandeep Kumar Acharya, Rishi Khatri
We derive new CMB anisotropy power spectrum and BBN constraints for evaporating primordial black holes by explicitly solving the electromagnetic particle cascades of emitted partic…
CMB spectral distortions constraints on primordial black holes, cosmic strings and long lived unstable particles revisited
Sandeep Kumar Acharya, Rishi Khatri
We calculate the spectral distortions from Hawking evaporation of primordial black holes before the epoch of recombination, taking into account emission of all standard model parti…
CMB anisotropy and BBN constraints on pre-recombination decay of dark matter to visible particles
Sandeep Kumar Acharya, Rishi Khatri
Injection of high energy electromagnetic particles around the recombination epoch can modify the standard recombination history and therefore the CMB anisotropy power spectrum. Pre…