论文标题
M矮人的第一个EROSITA-TESS结果：X射线活性旋转关系的质量依赖性和敏感性极限的评估
First eROSITA-TESS results for M dwarfs: Mass dependence of the X-ray activity rotation relation and an assessment of sensitivity limits
论文作者
论文摘要
我们使用来自Roentgen调查的新的X射线数据进行了一项研究，其中包括Roentgen调查中的新X射线数据，并在俄罗斯Spektrum-Roentgen-Gamma Mission（SRG）上使用成像望远镜阵列（Erosita）进行了成像望远镜阵列（EROSITA），并结合了来自Transiting Explatition Expliting Explanet Essportic sublice severial seplite satellite（tess）。这项工作中使用的恒星是从附近M矮人的超级链接正确的运动目录中选择的。我们研究了135颗恒星，在第一次Erosita调查（ERASS1）中均具有检测和从苔丝进行旋转期测量，该测量与我们先前的工作重新适应了197 SuperBlink M矮人的样本。我们使用三个质量箱拟合旋转周期短的恒星的活性旋转关系。我们最低的质量箱中恒星（$ m _ {\ star} \ leq 0.4 {\ rm m_ \ odot} $）中令人惊讶的正斜率是由于快速旋转时期（〜1-10 d）的恒星很少，可能是由于快速周期演变而引起的。与在苔丝旋转周期的恒星相比，ERASS1检测的比例要高得多，表明Erosita对较慢的旋转M矮人也很敏感，该旋转的M矮人处于不饱和方案中，对TESS无法获得的周期也很敏感。
We present a study of the activity-rotation relation for M dwarf stars, using new X-ray data from the ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Russian Spektrum-Roentgen-Gamma mission (SRG), combined with photometric rotation periods from the Transiting Exoplanet Survey Satellite (TESS). The stars used in this work are selected from the superblink proper motion catalog of nearby M dwarfs. We study the 135 stars with both a detection in the first eROSITA survey (eRASS1) and a rotation period measurement from TESS jointly with the sample of 197 superblink M dwarfs re-adapted from our previous work. We fit the activity-rotation relation for stars with rotation periods shorter than ~10 d (saturated regime) using three mass bins. The surprising positive slope for stars in our lowest mass bin ($M_{\star} \leq 0.4 {\rm M_\odot}$) is due to a paucity of stars with intermediate rotation periods (~ 1-10 d), probably caused by fast period evolution. The much higher fraction of eRASS1 detections compared to stars that have also rotation periods from TESS shows that eROSITA is also sensitive for slower rotating M dwarfs that are in the unsaturated regime with periods inaccessible to TESS.
