论文标题
在苔丝主要任务中观察到的恒星的可变性目录
Variability Catalog of Stars Observed During the TESS Prime Mission
论文作者
论文摘要
在其为期两年的主要任务中，苔丝在约70％的天空中观察到超过232,000颗恒星。这些数据提供了一系列的天体重要时间尺度，探测出色的旋转，出色的二进制和脉动的光度变异性记录。我们已经分析了苔丝2分钟光曲线，以识别时间标准0.01-13天的周期性变化，并探索了各种恒星特性的结果。我们已经以高信心确定了46,000多个周期性变量，并以中等的信心确定了38,000个周期性变量。这些光曲线显示了整个HR图的可变性类型的差异，旋转，黯然失色和脉冲变量的不同分组。我们还看到了跨周期亮度空间的有趣模式，高质量脉动脉冲，进化的恒星和接触二进制系统之间的周期和光度之间的相关性明显，与牛皮纸断裂相对应的不连续性以及在1.5至2天的时间序列上的主序列恒星周期性变化的发生较低。这项工作中确定的变量星与其他几个可变性目录进行了交叉识别，我们从中发现了可变性周期之间的良好一致性。在这项工作中有大约65,000个可变恒星，其中包括低质量恒星的旋转速率，高质量恒星的高频搏动周期以及各种巨型恒星变异性。
During its 2-year Prime Mission, TESS observed over 232,000 stars at a 2-min cadence across ~70% of the sky. These data provide a record of photometric variability across a range of astrophysically interesting time scales, probing stellar rotation, stellar binarity, and pulsations. We have analyzed the TESS 2-min light curves to identify periodic variability on timescales 0.01-13 days, and explored the results across various stellar properties. We have identified over 46,000 periodic variables with high confidence, and another 38,000 with moderate confidence. These light curves show differences in variability type across the HR diagram, with distinct groupings of rotational, eclipsing, and pulsational variables. We also see interesting patterns across period-luminosity space, with clear correlations between period and luminosity for high-mass pulsators, evolved stars, and contact binary systems, a discontinuity corresponding to the Kraft break, and a lower occurrence of periodic variability in main-sequence stars on timescales of 1.5 to 2 days. The variable stars identified in this work are cross-identified with several other variability catalogs, from which we find good agreement between the measured periods of variability. There are ~65,000 variable stars that are newly identified in this work, which includes rotation rates of low-mass stars, high-frequency pulsation periods for high-mass stars, and a variety of giant star variability.
