论文标题
Lamost和Kepler观察到的太阳式星星
Solar-type Stars Observed by LAMOST and Kepler
论文作者
论文摘要
获得具有近距离基本参数和旋转周期的恒星的色球环和光度计活性的测量对于更好地理解太阳能连接非常重要。我们从大天空区域多对象纤维光谱望远镜（Lamost） - 键盘片中选择具有近极基本参数的2603颗恒星样品，并使用Lamost Speptra来测量其色球活性和开普勒光曲线，以测量其光谱活性（即光度变异性的放大）。尽管由于光度变异性的低振幅和光曲线的高度不规则的时间谱，但无法测量1556颗恒星的旋转周期，但进一步确定了254颗恒星为近极旋转周期。我们表明，具有近极旋转周期的恒星具有系统的色球环活性，其系统上高于未发现旋转周期的恒星。此外，尽管对于未发现旋转周期的恒星的光晶和色球活性的太阳水平似乎是典型的，但太阳似乎比大多数近似旋转周期的恒星（在光晶和色球活性方面）都不那么活跃。
Obtaining measurements of chromospheric and photometric activity of stars with near-solar fundamental parameters and rotation periods is important for a better understanding of solar-stellar connection. We select a sample of 2603 stars with near-solar fundamental parameters from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)-Kepler field and use LAMOST spectra to measure their chromospheric activity and Kepler light curves to measure their photospheric activity (i.e., the amplitude of the photometric variability). While the rotation periods of 1556 of these stars could not be measured due to the low amplitude of the photometric variability and highly irregular temporal profile of light curves, 254 stars were further identified as having near-solar rotation periods. We show that stars with near-solar rotation periods have chromospheric activities that are systematically higher than stars with undetected rotation periods. Furthermore, while the solar level of photospheric and chromospheric activity appears to be typical for stars with undetected rotation periods, the Sun appears to be less active than most stars with near-solar rotation periods (both in terms of photospheric and chromospheric activity).
