Wrinkles in Time. I. Rapid Rotators Found in High-eccentricity Orbits

IF 4.8 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Rayna Rampalli, Amy Smock, Elisabeth R. Newton, Kathryne J. Daniel, Jason L. Curtis
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Abstract

Abstract Recent space-based missions have ushered in a new era of observational astronomy, where high-cadence photometric light curves for thousands to millions of stars in the solar neighborhood can be used to test and apply stellar age-dating methods, including gyrochronology. Combined with precise kinematics, these data allow for powerful new insights into our understanding of the Milky Way’s dynamical history. Using TESS data, we build a series of rotation period measurement and confirmation pipelines and test them on 1560 stars across five benchmark samples: the Pleiades, Pisces–Eridanus, Praesepe, the Hyades, and field stars from the MEarth Project. Our pipelines’ recovery rates across these groups are, on average, 89%. We then apply these pipelines to 4085 likely single stars with TESS light curves in two interesting regions of Galactic action space. We identify 141 unique, rapidly rotating stars in highly eccentric orbits in the disk, some of which appear as rotationally young as the 120 Myr old Pleiades. Pending spectroscopic analysis to confirm their youth, this indicates that these stars were subject to fast-acting dynamical phenomena, the origin of which will be investigated in later papers in this series.
岁月的皱纹。在高偏心率轨道上发现的快速旋转体
最近的天基任务开创了观测天文学的新时代,太阳附近数千到数百万颗恒星的高节奏光度光曲线可用于测试和应用恒星年龄测年方法,包括陀螺年代学。结合精确的运动学,这些数据为我们对银河系动力学历史的理解提供了强有力的新见解。利用TESS数据,我们建立了一系列旋转周期测量和确认管道,并在5个基准样本中的1560颗恒星上进行了测试:昴宿星团、双鱼座-仙女座、Praesepe、毕宿星团和来自地球计划的野星。在这些地区,我们的管道采收率平均为89%。然后,我们将这些管道应用于银河系活动空间中两个有趣区域的4085颗具有TESS光曲线的可能单星。我们确定了141颗独特的、快速旋转的恒星,它们在圆盘中高度偏心的轨道上运行,其中一些看起来像120迈的老昴宿星团一样年轻。尚待光谱分析来证实它们的年轻,这表明这些恒星受到快速动态现象的影响,其起源将在本系列后面的论文中进行研究。
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来源期刊
Astrophysical Journal
Astrophysical Journal 地学天文-天文与天体物理
CiteScore
8.40
自引率
30.60%
发文量
2854
审稿时长
1 months
期刊介绍: The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
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