On the decreasing fraction of Strong Ly$\alpha$ Emitters around $z$ $\sim$ $6$-$7$

Raphael Sadoun, Zheng Zheng, Jordi Miralda-Escudé

The fraction of galaxies with strong Ly$\alpha$ emission has been observed to decrease rapidly with redshift at $z\ge 6$, after a gradual increase at $z<6$. This has been interpreted…