论文标题
Lamost-Chepler场中F-，G-和K型星的磁活性
Magnetic Activity of F-, G-, and K-type Stars in the LAMOST-Kepler Field
论文作者
论文摘要
监测磁性活性的色球和光电指数可以提供有价值的信息，尤其是大气中不同部分之间的相互作用及其对磁场的响应。我们从Lamost-kepler程序中的Lamost Spectra中提取色球索引，S和RHK+，用于59,816颗恒星，而光电指数（Reff），对于Kepler Light Curves的5575颗星Reff。 LOG REFF显示与Log RHK+的正相关。我们分别估计F-，G-和K型星之间REFF和RHK+之间的幂律索引。我们还确认了色球和光球活性对恒星旋转的依赖性。 Ca II H和K的排放和光电变化通常随着旋转周期超过几天的恒星的旋转周期的增加而降低。指数衰减方案中的幂律索引在两个活动旋转关系中显示出不同的特征。更新的最大样本在内，包括活动代理和报告的旋转周期提供了更多信息，以了解酷星的磁活动。
Monitoring chromospheric and photospheric indexes of magnetic activity can provide valuable information, especially the interaction between different parts of the atmosphere and their response to magnetic fields. We extract chromospheric indexes, S and Rhk+, for 59,816 stars from LAMOST spectra in the LAMOST-Kepler program, and photospheric index, Reff, for 5575 stars from Kepler light curves. The log Reff shows positive correlation with log Rhk+. We estimate the power-law indexes between Reff and Rhk+ for F-, G-, and K-type stars, respectively. We also confirm the dependence of both chromospheric and photospheric activity on stellar rotation. Ca II H and K emissions and photospheric variations generally decrease with increasing rotation periods for stars with rotation periods exceeding a few days. The power-law indexes in exponential decay regimes show different characteristics in the two activity-rotation relations. The updated largest sample including the activity proxies and reported rotation periods provides more information to understand the magnetic activity for cool stars.
