论文标题
Revisit NGC 5466潮汐流提供$ GAIA $，SDSS/SEGUE和LAMOST
Revisit NGC 5466 Tidal Stream with $Gaia$, SDSS/SEGUE and LAMOST
论文作者
论文摘要
通过从$ GAIA $ EDR3，SDSS/SEGUE DR16和LAMOST DR8中挖掘数据，检测到NGC 5466潮汐流的11个成员明星，其中7个新鉴定出来。为了拒绝污染物，在天空位置，颜色标记图，金属性，适当的运动和径向速度中应用各种切割。我们将数据与在光滑的银河电位以及大麦哲伦云（LMC）下建模群集的破坏生成的模拟流进行了比较。模型和观测之间的相位相一致趋势表明，LMC可能会扰动该流。在11个检测成员中，两个最遥远的星星将流的长度追踪到$ 60^\ circ $ of Sky，并支撑并延长了$ 45^\ Circ $的先前长度。鉴于NGC 5466如此遥远，并且可能比以前想象的要长，因此我们希望NGC 5466潮汐流可以成为限制银河系重力场的有用工具。
By mining the data from $Gaia$ EDR3, SDSS/SEGUE DR16 and LAMOST DR8, 11 member stars of the NGC 5466 tidal stream are detected and 7 of them are newly identified. To reject contaminators, a variety of cuts are applied in sky position, color-magnitude diagram, metallicity, proper motion and radial velocity. We compare our data to a mock stream generated by modeling the cluster's disruption under a smooth Galactic potential plus the Large Magellanic Cloud (LMC). The concordant trends in phase-space between the model and observations imply that the stream might have been perturbed by LMC. The two most distant stars among 11 detected members trace the stream's length to $60^\circ$ of sky, supporting and extending the previous length of $45^\circ$. Given that NGC 5466 is so distant and potentially has a longer tail than previously thought, we expect that NGC 5466 tidal stream could be a useful tool in constraining the Milky Way gravitational field.
