论文标题
与苔丝和开普勒周围的旋转分布:年龄,金属性和二元性的影响
Rotation Distributions around the Kraft Break with TESS and Kepler: The Influences of Age, Metallicity, and Binarity
论文作者
论文摘要
恒星旋转是质量,金属性和年龄的复杂功能,可以通过二进制来改变。为了了解这些参数在主序列星中的重要性,我们组装了一系列观测值,这些观测值使用来自过境外部系外行星调查卫星(TESS)和开头空间望远镜的观测值组合跨越了这些参数。我们发现,尽管我们可以测量旋转周期并识别苔丝灯弯曲的其他类别的恒星变异性(例如脉动),但仪器系统会阻止检测旋转信号的时间比13.7天的苔丝轨道周期更长。由于该检测极限,我们还使用旋转周期使用旋转速度约束,该旋转速度通过横向光谱调查测量和使用Gaia任务估算的苔丝和开普勒恒星估算的半径。从这些旋转期间,我们1)发现我们可以按离散的质量轨道跟踪旋转演化,这是恒星年龄的函数,2)发现我们无法在旋转和金属性之间恢复趋势,而先前的研究观察到的旋转和金属性之间的趋势; 3)指出,我们的样本表明,我们的样本揭示了较广泛的二进制伴侣不会影响旋转,而亲密的二元伴侣会导致恒星比单个旋转旋转更快地旋转。
Stellar rotation is a complex function of mass, metallicity, and age and can be altered by binarity. To understand the importance of these parameters in main sequence stars, we have assembled a sample of observations that spans a range of these parameters using a combination of observations from The Transiting Exoplanet Survey Satellite (TESS) and the Kepler Space Telescope. We find that while we can measure rotation periods and identify other classes of stellar variability (e.g., pulsations) from TESS lightcurves, instrument systematics prevent the detection of rotation signals longer than the TESS orbital period of 13.7 days. Due to this detection limit, we also utilize rotation periods constrained using rotational velocities measured by the APOGEE spectroscopic survey and radii estimated using the Gaia mission for both TESS and Kepler stars. From these rotation periods, we 1) find we can track rotational evolution along discrete mass tracks as a function of stellar age, 2) find we are unable to recover trends between rotation and metallicity that were observed by previous studies, and 3) note that our sample reveals that wide binary companions do not affect rotation, while close binary companions cause stars to exhibit more rapid rotation than single stars.