论文标题
黑洞在矮星系中触发恒星形成2-10
Black hole triggered star formation in the dwarf galaxy Henize 2-10
论文作者
论文摘要
在一些具有活性银河核（1）的矮星系中观察到了黑洞驱动的流出（1），并且可能在加热和排出气体（从而抑制恒星形成）中，就像它们在较大的星系中一样（2）。黑洞流出在矮星系中触发恒星形成的程度尚不清楚，因为该地区的工作迄今已集中在大规模星系上，观察性证据很少（3,4,5）。 Henize 2-10是以前据报道具有中央巨大黑洞（6,7,8,9）的矮人星堡星系，尽管这种解释已经存在争议，因为观察证据的某些方面也与超新星的残留物相一致（10,11）。在约9 MPC的距离下，它提供了解决中心区域的机会，并确定是否有证据表明黑洞流出影响恒星形成。在这里，我们报告了Henize 2-10的光学观察，并以几个parsec的线性分辨率进行了线性分辨率。我们发现一个〜150 pc的长电离灯丝将黑洞的区域与近期恒星形成的部位相连。光谱揭示了正弦状的位置 - 速度结构，该结构通过简单的进攻性双极流出很好地描述。我们得出的结论是，这个黑洞流出触发了恒星形成。
Black hole driven outflows have been observed in some dwarf galaxies with active galactic nuclei (1), and likely play a role in heating and expelling gas (thereby suppressing star formation), as they do in larger galaxies (2). The extent to which black hole outflows can trigger star formation in dwarf galaxies is unclear, because work in this area has hitherto focused on massive galaxies and the observational evidence is scarce (3,4,5). Henize 2-10 is a dwarf starburst galaxy previously reported to have a central massive black hole (6,7,8,9), though that interpretation has been disputed since some aspects of the observational evidence are also consistent with a supernova remnant (10,11). At a distance of ~9 Mpc, it presents an opportunity to resolve the central region and determine if there is evidence for a black hole outflow impacting star formation. Here we report optical observations of Henize 2-10 with a linear resolution of a few parsecs. We find a ~150 pc long ionized filament connecting the region of the black hole with a site of recent star formation. Spectroscopy reveals a sinusoid-like position-velocity structure that is well described by a simple precessing bipolar outflow. We conclude that this black hole outflow triggered the star formation.
