Spinelli, M.; Kyriakou, G.; Bernardi, G.; Bolli, P.; Greenhill, L. J.; Fialkov, A.; Garsden, H.
(2022)
Cosmic dawn, the onset of star formation in the early universe, can in principle be studied via the 21-cm transition of neutral hydrogen, for which a sky-averaged absorption signal, redshifted to MHz frequencies, is predicted ...