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arXiv 1606.02701astro-ph.EPastro-ph.SR
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PTFO8-8695中的H-α变率和可能直接探测到来自200万年前蒸发热木星的辐射

H-alpha Variability in PTFO8-8695 and the Possible Direct Detection of Emission from a 2 Million Year Old Evaporating Hot Jupiter

Christopher M. Johns-Krull, Lisa Prato, Jacob N. McLane, David R. Ciardi, Julian C. van Eyken, Wei Chen, John R. Stauffer, Charles A. Beichman, Sarah A. Frazier… 展开作者

Christopher M. Johns-Krull, Lisa Prato, Jacob N. McLane, David R. Ciardi, Julian C. van Eyken, Wei Chen, John R. Stauffer, Charles A. Beichman, Sarah A. Frazier, Andrew F. Boden, Maria Morales-Calderon, Luisa M. Rebull

摘要:

我们使用高时间节奏,高光谱分辨率的光学观测,以检测过剩的H-α发射从2 - 3万年的老弱线金牛座T星PTFO 8 -8695。如果这些多余的辐射是由这颗年轻恒星的疑似行星伴星产生的,那么它的运动速度似乎与预期的一样。过量发射并不总是存在的,但是当它存在时,经常观察到预测的速度运动。我们已经考虑了观测到的过量辐射是由恒星活动(耀斑)、盘吸积或行星伴星产生的可能性;我们发现行星伴星是最可能的解释。如果是这样的话,H-alpha线的强度表明发射来自行星周围的扩展体积,可能是由行星的质量损失提供的,预计将溢出其洛希瓣。

英文摘要:

We use high time cadence, high spectral resolution optical observations to detect excess H-alpha emission from the 2 - 3 Myr old weak lined T Tauri star PTFO8-8695. This excess emission appears to move in velocity as expected if it were produced by the suspected planetary companion to this young star. The excess emission is not always present, but when it is, the predicted velocity motion is often observed. We have considered the possibility that the observed excess emission is produced by stellar activity (flares), accretion from a disk, or a planetary companion; we find the planetary companion to be the most likely explanation. If this is the case, the strength of the H-alpha line indicates that the emission comes from an extended volume around the planet, likely fed by mass loss from the planet which is expected to be overflowing its Roche lobe.

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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