The Impact of Galaxy Overdensities and Ionized Bubbles on Lyα Emission at z∼7.0-8.5

2025/05/29 by Chen, Zuyi, Stark, Daniel P., Mason, Charlotte A. +4
#Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences

paper · doi:10.48550/arxiv.2505.24080

Abstract

Lyα spectroscopy with JWST is opening a new window on the sizes of ionized bubbles through the reionization epoch. Theoretical expectations suggest typical bubble radii should be 0.6-1.5 pMpc at z≃ 7, assuming neutral hydrogen fractions of the intergalactic medium in the range x_{\rm HI}=0.5-0.7. Here we investigate this picture using JWST to characterize the environment and Lyα emission of 292 galaxies at 7.0

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