Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 858, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/aac0fe
Keywords
cosmology: theory; dark ages, reionization, first stars; early universe; methods: analytical; radio continuum: general
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Funding
- Brand and Monica Fortner Chair
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We revisit the global 21 cm signal calculation incorporating a possible radio background at early times, and find that the global 21 cm 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.
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