Evidence for Infalling Gas in a Lyman-$\alpha$ Blob

Yiping Ao, Zheng Zheng, Christian Henkel +11

Lyman-$\alpha$ blobs (LABs) are spatially extended nebulae of emission in the Ly$\alpha$ line of hydrogen, seen at high redshifts${}^{1,2}$, and most commonly found in the dense environment of…