Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 483, Issue 4, Pages 5329-5333Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty3426
Keywords
supernovae: general; cosmic rays; intergalactic medium; dark ages, reionization, first stars
Categories
Ask authors/readers for more resources
We consider the synchrotron emission from high-energy electrons accelerated in supernova explosions of massive Population III stars in high-redshift minihaloes of mass 10(5-7) M-circle dot. We show the resulting intensity of radio background from this process can be substantial, which could potentially explain the recently reported EDGES result, if not for the associated heating of the IGM by CR protons, which are also produced at the same time. The trade-off between the radio background and heating is such that the 21 cm brightness temperature cannot be larger than vertical bar Delta T-21 vertical bar similar to 0.25 K. The radio background and heating are both produced by energetic particles, although one by energetic electrons and the other by energetic protons. The two competing processes, production of radio background and heating of IGM by Pop III supernovae, determine the depth of the trough in the 21 cm brightness temperature, which can be observed in future experiments and used as a test of this scenario.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available