论文标题
使用恒星旋转来识别Praesepe开放群集的潮汐剥离成员
Using stellar rotation to identify tidally stripped members of the Praesepe open cluster
论文作者
论文摘要
作为一个开放的簇绕着银河系绕，重力场会扭曲它，从核心剥离恒星并形成潮汐尾巴。最近的工作已经确定了Praesepe群集的潮汐尾巴。我们探索旋转期，以确认这些候选成员。在开放簇中，旋转周期分布由于磁制动而随着时间的流逝而演变。由于潮汐剥离的恒星最初是在群集中形成的，因此它们应遵循与群集核心相同的周期分布。我们分析了由NASA的过境系外行星调查卫星（TESS）任务观察到的96名候选成员。我们测量32颗恒星的可靠旋转周期，而64条光曲线则以噪声为主。 32个新确定的旋转器与核心中的周期分布以及Praesepe的过去成员资格一致。因此，我们建议对于附近的开放群集，恒星旋转提供了一种快速且廉价的方法，用于确认过去的成员分散到潮汐尾巴中。
As an open cluster orbits the Milky Way, gravitational fields distort it, stripping stars from the core and forming tidal tails. Recent work has identified tidal tails of the Praesepe cluster; we explore rotation periods as a way to confirm these candidate members. In open clusters, the rotation period distribution evolves over time due to magnetic braking. Since tidally stripped stars originally formed within the cluster, they should follow the same period distribution as in the cluster core. We analyze 96 candidate members observed by NASA's Transiting Exoplanet Survey Satellite (TESS) mission. We measure reliable rotation periods for 32 stars, while 64 light curves are noise-dominated. The 32 newly identified rotators are consistent with the period distribution in the core, and with past membership in Praesepe. We therefore suggest that for nearby open clusters, stellar rotation offers a quick and inexpensive method for confirming past members dispersed into tidal tails.
