State of the Universe
Cosmological probes of electromagnetic and neutrino energy injection at high redshifts
by Mr. Sandeep Acharya (TIFR, Mumbai)
Friday, September 25, 2020 from to (Asia/Kolkata)
https://zoom.us/j/92054038993?pwd=ekdjN08zemI4dUZIV2VLVGRmTmdLUT09 Meeting ID: 920 5403 8993 Passcode: 638418
Precise measurements of cosmological observables has not only established the standard model of cosmology but also severely restricts possible extensions to it. In this talk, I will briefly overview high redshift observables such as CMB spectral distortions, light element abundance and CMB anisotropy. I will use these probes to constrain electromagnetic and neutrino energy injection scenarios in the pre- and post-recombination era. Specifically, i will concentrate on dark matter decay and primordial black hole evaporation as energy injection processes and the implications of our calculations for these cases.