Barkana, RennanLoeb, Abraham2019-09-242002Barkana, Rennan, and Abraham Loeb. 2002. “Effective Screening Due to Minihalos during the Epoch of Reionization.” The Astrophysical Journal 578 (1): 1–11. https://doi.org/10.1086/342313.0004-637X1538-4357http://nrs.harvard.edu/urn-3:HUL.InstRepos:41393313We show that the gaseous halos of collapsed objects introduce a substantial cumulative opacity to ionizing radiation, even after the smoothly distributed hydrogen in the intergalactic medium has been fully reionized. This opacity causes a delay of Deltazgreater than or similar to1 in redshift between the time of the overlap of ionized bubbles in the intergalactic medium and the lifting of complete Gunn-Peterson Lyalpha absorption. The minihalos responsible for this screening effect are not resolved by existing numerical simulations of reionization.en-USJournal Article2019-09-2410.1086/342313