Preprint
Oct 2026
A Burst of Reionization in the Dark Ages
Primordial overdensities at small scales can be significantly larger than those observed at large scales. As a result, they can collapse much earlier, at redshifts $z \sim 100$. In these collapsed halos, stars and black holes can form, where they can then contribute to an early reionization of the universe. If this epo...
Neal Weiner, Soubhik Kumar, W. Qin et al.
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