Tootfinder

Probing the ionizing photon output of galaxies near cosmic dawn with the patchy kSZ effect
Garett Lopez, Anson D'Aloisio, Christopher Cain
https://arxiv.org/abs/2507.17817 h…

Probing the ionizing photon output of galaxies near cosmic dawn with the patchy kSZ effect
A key result from JWST's first cycles is that galaxy formation was well underway by $z=10$. The implications of these early galaxies for reionization are less clear, however. The CMB is one of the few windows into the ionization state of the IGM during reionization's first half, providing an important probe of the ionizing photon sources at those times. Meanwhile, measurements of the Lyman-$α$ forest in the spectra of high-$z$ quasars have improved to the level of tightly constraining the timi…