论文标题
苔丝大统一热木星调查。 ii。二十个新巨型行星
The TESS Grand Unified Hot Jupiter Survey. II. Twenty New Giant Planets
论文作者
论文摘要
NASA的过境系外行星调查卫星（TESS）任务有望通过提供适合人口研究的过渡热木星的全天空级，限制的样本来提高我们对热木星的理解。组装这样的样本需要确认数百名行星候选者以及其他随访观察结果。在这里，我们介绍了使用苔丝数据检测到的二十个热木星，并通过光度，光谱和成像观测值确认为行星，该观测值是由苔丝随访观察程序（TFOP）协调的。这20个行星的轨道周期短于7天，轨道相对明亮的FGK恒星（$ 10.9 <g <g <13.0 $）。尽管有四个行星的质量低于土星，但大多数行星的质量与木星相当。 TOI-3976 B是我们样本中最长的星球（$ p = 6.6 $天），可能处于中等偏心的轨道上（$ e = 0.18 \ pm0.06 $），而其他目标的观察结果与它们在圆形轨道上的观察结果一致。我们测量了TOI-1937A B的预计恒星斜率，这是带有rossiter-mclaughlin效果的22.4小时轨道上的热木星，发现星球的轨道与出色的旋转轴（$ | |λ| = 4.0 \ pm3.5^\ civd $ $）相吻合。我们还调查了TOI-1937是NGC 2516公开集群的成员的可能性，但最终发现了集群成员资格的证据。这些对象是更大的努力的一部分，以构建完整的热木星样本，以用于未来的人口统计学和详细的表征工作。
NASA's Transiting Exoplanet Survey Satellite (TESS) mission promises to improve our understanding of hot Jupiters by providing an all-sky, magnitude-limited sample of transiting hot Jupiters suitable for population studies. Assembling such a sample requires confirming hundreds of planet candidates with additional follow-up observations. Here, we present twenty hot Jupiters that were detected using TESS data and confirmed to be planets through photometric, spectroscopic, and imaging observations coordinated by the TESS Follow-up Observing Program (TFOP). These twenty planets have orbital periods shorter than 7 days and orbit relatively bright FGK stars ($10.9 < G < 13.0$). Most of the planets are comparable in mass to Jupiter, although there are four planets with masses less than that of Saturn. TOI-3976 b, the longest period planet in our sample ($P = 6.6$ days), may be on a moderately eccentric orbit ($e = 0.18\pm0.06$), while observations of the other targets are consistent with them being on circular orbits. We measured the projected stellar obliquity of TOI-1937A b, a hot Jupiter on a 22.4 hour orbit with the Rossiter-McLaughlin effect, finding the planet's orbit to be well-aligned with the stellar spin axis ($|λ| = 4.0\pm3.5^\circ$). We also investigated the possibility that TOI-1937 is a member of the NGC 2516 open cluster, but ultimately found the evidence for cluster membership to be ambiguous. These objects are part of a larger effort to build a complete sample of hot Jupiters to be used for future demographic and detailed characterization work.
