论文标题
银河中心的高速恒星流
A stream of hypervelocity stars from the Galactic Center
论文作者
论文摘要
最近的观察结果发现了大约500万年前从银河中心弹出的1700 km/s星[S5-HVS1]。该恒星很可能是由于二进制的潮汐破坏而产生的。特别是，银河系中心包含了几百万年历史的恒星磁盘，可以通过世俗的引力不稳定刺激几乎径向轨道。这种二进制文件将被中央超级黑洞破坏，还可以解释观察到的B恒星簇〜0.01 pc的块状群。在本文中，我们预测S5-HVS1是较大流的一部分，并使用观察动机的N体模拟来预测其空间和速度分布。
Recent observations have found a 1700 km/s star [S5-HVS1] that was ejected from the Galactic Center approximately five million years ago. This star was likely produced by tidal disruption of a binary. In particular, the Galactic Center contains a few million year old stellar disk that could excite binaries to nearly radial orbits via a secular gravitational instability. Such binaries would be disrupted by the central supermassive black hole, and would also explain the observed cluster of B stars ~0.01 pc from the Galactic Center. In this paper we predict S5-HVS1 is part of a larger stream, and use observationally motivated N-body simulations to predict its spatial and velocity distribution.
