A New Constraint on Reionization from Evolution of the Ly$\alpha$ Luminosity Function at $z\sim 6-7$ Probed by a Deep Census of $z=7.0$ Ly$\alpha$ Emitter Candidates to 0.3 $L^{\ast }$

Kazuaki Ota, Masanori Iye, Nobunari Kashikawa +10

We detect 20 $z=7.0$ Ly$\alpha$ emitter (LAE) candidates to $L(\mathrm{Ly}\alpha )\ge 2\times 10^{42}$ erg s${}^{-1}$ or $0.3$ $L_{z=7}^{\ast }$ and in $6.1\times 10^5$ Mpc${}^3$ volume in the Subaru D…