Galactic Centre star formation: the case of the missing gas disc The missing gas disc at the Galactic Centre
Galactic Centre star formation: the case of the missing gas disc The missing gas disc at the Galactic Centre
复制标题
银河中心恒星形成：失踪气盘案例 银河中心失踪气盘
DOI：
10.1111/j.1365-2966.2011.19849.x
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发表时间：
2012
影响因子：
4.8
通讯作者：
Alexander R
中科院分区：
文献类型：
--
作者：
Alexander R
我们研究银河系中心附近恒星和气体的动态演化。在银河系中心观测到的任何形成年轻恒星的合理方法都会留下一个半径为0.01 pc的残余气体盘。 我们发现，粘性吸积和与恒星的引力相互作用的综合效应不能有效地去除残余气体，并且恒星盘内部的大量气体盘在恒星形成后持续了> 1000万年。 由于目前在银河系中心没有看到这样的圆盘，我们认为它是由超大质量黑洞吸积的。这种情况提供了一个有吸引力的连接之间的核星星的形成和黑洞的喂养，我们认为，“失踪”的气体可能已被用来供电Sgr A*。
We study the dynamical evolution of stars and gas close to the centre of the Milky Way. Any plausible means of forming the young stars observed at the Galactic Centre leaves behind a residual gas disc at ∼0.01 pc radii. We show that the combined effects of viscous accretion and gravitational interactions with stars do not remove the residual gas efficiently, and that a substantial gas disc, interior to the stellar disc, persists for >10 Myr after the stars form. Since no such disc is currently seen at the Galactic Centre, we argue that it has been accreted by the supermassive black hole. This scenario offers an attractive connection between nuclear star formation and black hole feeding, and we suggest that the ‘missing’ gas may have been used to power Sgr A*.