The clustering of Lyman alpha emitters at z=7: implications for reionization and host halo masses

Understand

The Ly$\alpha$ line of high-redshift galaxies has emerged as a powerful probe of both early galaxy evolution and the epoch of reionization (EoR).

• Motivated by the upcoming wide-field survey with the Subaru Hyper Suprime-Cam (HSC), we study the angular correlation function (ACF) of narrow-band selected, $z\approx7$ Ly$\alpha$ emitting galaxies (LAEs).
• The clustering of LAEs is determined by both: (i) their typical host halo masses, $\bar{M}_{\rm h}$; and (ii) the absorption due to a patchy EoR, characterized by an average neutral fraction of the intergalactic medium, $\bar{x}_{\rm HI}$.
• We bracket the allowed LAE ACFs by exploring extreme scenarios for both the intrinsic Ly$\alpha$ emission and the large-scale pattern (i.e.