環繞氫的超級光環圍繞早期星系

[peter]

https://www.sciencedaily.com/releases/2017/03/170323141405.htm
http://www.space.com/36181-super-halos-surround-milky-way-like-galaxies-in-early-universe-video.html


宇宙年齡只有 8% 早期時間  類似 星係在環繞氫 光環中



Artist impression of a progenitor of Milky Way-like galaxy in the early universe with a background quasar shinning through a 'super halo' of hydrogen gas surrounding the galaxy. New ALMA observations of two such galaxies reveal that these vast halos extend well beyond the galaxies' dusty, star-forming disks. The galaxies were initially found by the absorption of background quasar light passing through the galaxies. ALMA was able to image the ionized carbon in the galaxies' disks, revealing crucial details about their structures.