PIRSA:22060004

Can Radio sky reveal primordial electron-proton interactions?

Ramirez-Quezada, M. (2022). Can Radio sky reveal primordial electron-proton interactions? . Perimeter Institute. https://pirsa.org/22060004

Ramirez-Quezada, Maura. Can Radio sky reveal primordial electron-proton interactions? . Perimeter Institute, Jun. 21, 2022, https://pirsa.org/22060004 

          @misc{ pirsa_PIRSA:22060004,
            doi = {10.48660/22060004},
            url = {https://pirsa.org/22060004},
            author = {Ramirez-Quezada, Maura},
            keywords = {Particle Physics},
            language = {en},
            title = {Can Radio sky reveal primordial electron-proton interactions? },
            publisher = {Perimeter Institute},
            year = {2022},
            month = {jun},
            note = {PIRSA:22060004 see, \url{https://pirsa.org}}
          }

Maura Ramirez-Quezada University of Sydney

DOI 10.48660/22060004
Collection
Talk Type Scientific Series
Subject

Abstract

The cosmic radio background (CRB) contains diffuse, discrete and cosmological emission sources from the universe. In this talk, I will discuss  wether an additional contribution coming from low frequency photons is produced by free-free emission during the recombination era of the univers. These photons do not readily thermalise with the electron-proton plasma and therefore might  survive as a small non-thermal relic in the current universe.  Inclusion of such a contribution can alleviate the observed tension between existing CRB models and explain radio source counts between $100 MHz$ to $10 GHz$ to a very high degree of precision.  I will also discuss the challenges and future work we must considere in order to establish wether the signal is created or not.

Zoom Link: https://pitp.zoom.us/j/99032512514?pwd=eldocVA2VHhoUGVudmtFN3F4NHNEQT09