论文标题
Kelt-9及其超热木星：恒星参数，构图和行星污染
KELT-9 and its ultra-hot Jupiter: stellar parameters, composition, and planetary pollution
论文作者
论文摘要
Kelt-9b是一种非常热的木星，观察到正在遭受极端质量损失。它的A0型宿主恒星具有辐射膜，这使其表面层容易保留最近积聚的材料。为了寻找恒星表面污染行星材料的潜在迹象，我们对Kelt-9待办事项进行了最全面的化学特征。新元素检测包括Na和Y，该元素以前在超热的木星中被检测到，但未在恒星中进行研究。这些检测完成了在恒星和行星中测得的九个元素的集合。在比较Kelt-9与类似的开放聚类星时，我们发现没有强烈的异常。这一发现与光电污染的计算是一致的，该计算占了出色的混合和使用观察估计的KELT-9B质量损失率。我们还排除了最近短暂的强化质量转移，例如地球质量外事物的出色摄入。
KELT-9b is an ultra-hot Jupiter observed to be undergoing extreme mass loss. Its A0-type host star has a radiative envelope, which makes its surface layers prone to retaining recently accreted material. To search for potential signs of planetary material polluting the stellar surface, we carry out the most comprehensive chemical characterisation of KELT-9 to-date. New element detections include Na and Y, which had previously been detected in the ultra-hot Jupiter but not studied in the star; these detections complete the set of nine elements measured in both star and planet. In comparing KELT-9 with similar open cluster stars we find no strong anomalies. This finding is consistent with calculations of photospheric pollution accounting for stellar mixing and using observationally estimated KELT-9b mass loss rates. We also rule out recent, short-lived intensive mass transfer such as the stellar ingestion of an Earth-mass exomoon.
