The first direct imaging of the silhouette of a damped Lyman $\alpha$ system along the line-of-sight to a background galaxy

Fuga Komori, Akio K. Inoue, Ken Mawatari +7

The H~{\sc i} gas distribution in damped Lyman $\alpha$ absorbers (DLAs) has remained elusive due to the point-source nature of background quasar emission. Observing DLAs against spatia…