利用TESS“快速查看”全天银河系考古学：来自MIT快速查看管道的158，000个振荡红巨星
A 'Quick Look' at All-Sky Galactic Archeology with TESS: 158,000 Oscillating Red Giants from the MIT Quick-Look Pipeline
摘要：
我们从美国宇航局的凌日系外行星调查卫星（TESS）的主要任务数据中首次提出了振荡红巨星的几乎全天产量。我们将机器学习应用于麻省理工学院Quick-Look Pipeline首次发布的长节奏TESS测光，以自动检测频率功率谱中红巨星振荡的存在。探测到的目标经过保守的审查，总共产生了158，505颗振荡红巨星，这比开普勒和K2的产量增加了一个数量级，也是TESS标称任务中振荡巨星可能产量的下限。对于每一个检测到的目标，我们报告的有效温度和半径来自颜色和盖娅的反射，以及估计其频率在最大振荡功率。使用我们的测量，我们提出了第一个近全天空盖亚-asteroseismology质量地图，它显示了全球结构与预期的恒星星族我们的银河系。为了证明TESS星震学的强大潜力，即使只有一个月的观测银河系考古学，我们确定了354个新的候选人振荡巨人在星系晕，显示银河系盘的垂直质量梯度，并可视化恒星质量与运动相空间子结构，速度色散和$α$ -丰度的相关性。
英文摘要：
We present the first near all-sky yield of oscillating red giants from the prime mission data of NASA's Transiting Exoplanet Survey Satellite (TESS). We apply machine learning towards long-cadence TESS photometry from the first data release by the MIT Quick-Look Pipeline to automatically detect the presence of red giant oscillations in frequency power spectra. The detected targets are conservatively vetted to produce a total of 158,505 oscillating red giants, which is an order of magnitude increase over the yield from Kepler and K2 and a lower limit to the possible yield of oscillating giants across TESS's nominal mission. For each detected target, we report effective temperatures and radii derived from colors and Gaia parallaxes, as well as estimates of their frequency at maximum oscillation power. Using our measurements, we present the first near all-sky Gaia-asteroseismology mass map, which shows global structures consistent with the expected stellar populations of our Galaxy. To demonstrate the strong potential of TESS asteroseismology for Galactic archeology even with only one month of observations, we identify 354 new candidates for oscillating giants in the Galactic halo, display the vertical mass gradient of the Milky Way disk, and visualize correlations of stellar masses with kinematic phase space substructures, velocity dispersions, and $α$-abundances.
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