http://arxiv.org/abs/1802.07432
We revisit the global 21cm signal calculation incorporating a possible radio background at early times, and find that the global 21cm signal shows a much stronger absorption feature, which could enhance detection prospects for future 21 cm experiments. In light of recent reports of a possible low-frequency excess radio background, we propose that detailed 21 cm calculations should include a possible early radio background.
C. Feng and G. Holder
Thu, 22 Feb 18
49/60
Comments: 4 pages, 4 figures