论文标题
检查40 Myr Tucana-Horologium关联与苔丝的旋转周期分布
Examining the Rotation Period Distribution of the 40 Myr Tucana-Horologium Association with TESS
论文作者
论文摘要
图卡纳州议会协会（Tuc-Hor）是南部天空中的40个MYR老群。在这项工作中，我们测量了313个Tuc-Hor物体的旋转周期，其苔丝光曲线源自苔丝的全框图像和由Gaia EDR3运动学和已知青年指标驱动的成员列表。我们恢复了样本的81.4％的期间，并为TUC-HOR对象报告了255个旋转期。从这些对象中，我们基于多个周期性信号或离群值GAIA DR2和EDR3重新归一化的单位重量误差（RUWE）值确定11个候选二进制文件。我们还鉴定了样品中三个新的复合旋转器（具有复杂的光曲线形态的迅速旋转的M矮小物体）。除了属于TUC-马的六个先前已知的复杂旋转器外，我们还比较了苔丝周期1和周期3之间的光曲线形态，并发现它们发生了实质性变化。此外，我们通过与其他青年指标（如Hα和Li等效宽度，以及近极紫和X射线通量）一起描述旋转周期分布，从而为整个TUC-HOR旋转样品提供背景。我们发现，用苔丝测量旋转期是确认年轻移动组成员的快速有效手段。
The Tucana-Horologium Association (Tuc-Hor) is a 40 Myr old moving group in the southern sky. In this work, we measure the rotation periods of 313 Tuc-Hor objects with TESS light curves derived from TESS full frame images and membership lists driven by Gaia EDR3 kinematics and known youth indicators. We recover a period for 81.4% of the sample and report 255 rotaion periods for Tuc-Hor objects. From these objects we identify 11 candidate binaries based on multiple periodic signals or outlier Gaia DR2 and EDR3 re-normalised unit weight error (RUWE) values. We also identify three new complex rotators (rapidly rotating M dwarf objects with intricate light curve morphology) within our sample. Along with the six previously known complex rotators that belong to Tuc-Hor, we compare their light curve morphology between TESS Cycle 1 and Cycle 3 and find they change substantially. Furthermore, we provide context for the entire Tuc-Hor rotation sample by describing the rotation period distributions alongside other youth indicators such as Hα and Li equivalent width, as well as near ultra-violet and X ray flux. We find that measuring rotation periods with TESS to be a fast and effective means to confirm members in young moving groups.
