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arXiv 2004.06859astro-ph.EPastro-ph.SR
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对于超热的木星WASP-189 b,没有检测到一致的大气吸收

No consistent atmospheric absorption detected for the ultra-hot Jupiter WASP-189 b

P. Wilson Cauley, Evgenya Shkolnik, Ilya Ilyin, Klaus G. Strassmeier, Seth Redfield, Adam G. Jensen

摘要:

我们在LBT上观察到超热木星WASP-189 b的部分凌日。我们在多个原子跃迁中检测到高度可变的过境信号,包括H-α,Fe I和Mg I。信号与过境的行星大气不一致。相反,我们认为,在过境信号是由于不均匀的恒星表面。我们的观测表明,在普通的光学原子示踪剂缺乏一个高度扩展的气氛。虽然WASP-189非常明亮,但由于过境深度小,大气层明显致密,因此很难描述行星的大气特征。

英文摘要:

We observed a partial transit of the ultra-hot Jupiter WASP-189 b with PEPSI on the LBT. We detect a highly variable transit signal in multiple atomic transitions, including H-alpha, Fe I, and Mg I. The signal is not consistent with a transiting planetary atmosphere. We suggest instead that the in-transit signal is due to an inhomogeneous stellar surface. Our observations demonstrate the lack of a highly extended atmosphere in common optical atomic tracers. Although WASP-189 is very bright, atmospheric characterization of the planet will be difficult due to the small transit depth and apparently compact atmosphere.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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