A cosmic stream of atomic carbon gas connected to a massive radio galaxy at redshift 3.8.
A cosmic stream of atomic carbon gas connected to a massive radio galaxy at redshift 3.8.
复制标题
原子碳气体的宇宙流与红移 3.8 的巨大射电星系相连。
DOI：
10.1126/science.abh2150
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Emonts BHC
中科院分区：
文献类型：
--
作者：
Emonts BHC
早期宇宙中星系的生长是由环绕星系和星系际气体的吸积驱动的。模拟预测，稳定的冷气体流会穿透星系的暗物质晕，并提供维持恒星形成所需的原材料。我们报告了一条延伸 100 千秒差距的丝状气体流，并连接到巨大的射电星系 4C 41.17。我们利用原子碳 [Ci] 线（中性原子或分子氢气的示踪剂）的 3P1 至 3P0 发射的亚毫米观测来检测该流。该星系有一个中央储气库，为剧烈的星暴提供燃料。我们的结果表明，恒星形成的原材料可能存在于星系外的宇宙流中。
The growth of galaxies in the early Universe is driven by accretion of circum- and intergalactic gas. Simulations have predicted that steady streams of cold gas penetrate the dark matter halos of galaxies and provide the raw material necessary to sustain star formation. We report a filamentary stream of gas that extends for 100 kiloparsecs and connects to the massive radio galaxy 4C 41.17. We detected the stream using submillimeter observations of the3P1to3P0emission from the [Ci] line of atomic carbon, a tracer of neutral atomic or molecular hydrogen gas. The galaxy contains a central gas reservoir that is fueling a vigorous starburst. Our results show that the raw material for star formation can be present in cosmic streams outside galaxies.