http://arxiv.org/abs/2301.03298
Observations of the first billion years of cosmic history are currently limited. We demonstrate the synergy between observations of the sky-averaged 21-cm signal from neutral hydrogen and interferometric measurements of the corresponding spatial fluctuations. By jointly analysing data from SARAS3 (redshift $z\approx15-25$) and limits from HERA ($z\approx8$ and $10$), we produce the tightest constraints to date on the astrophysics of galaxies 200 million years after the Big Bang. We disfavour at $95\%$ confidence scenarios in which power spectra are $\geq126$ mK$^{2}$ at $z=25$ and the sky-averaged signals are $\leq-277$ mK.
H. Bevins, S. Heimersheim, I. Abril-Cabezas, et. al.
Tue, 10 Jan 23
30/93
Comments: Submitted
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