Video URL http://pirsa.org/22060004
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.
- Particle Physics
- Scientific Series