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arXiv 1703.04166astro-ph.EPastro-ph.IMastro-ph.SR
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TRAPPIST-1中的七行星共振链

A seven-planet resonant chain in TRAPPIST-1

Rodrigo Luger, Marko Sestovic, Ethan Kruse, Simon L. Grimm, Brice-Olivier Demory, Eric Agol, Emeline Bolmont, Daniel Fabrycky, Catarina S. Fernandes, Valérie Va… 展开作者

Rodrigo Luger, Marko Sestovic, Ethan Kruse, Simon L. Grimm, Brice-Olivier Demory, Eric Agol, Emeline Bolmont, Daniel Fabrycky, Catarina S. Fernandes, Valérie Van Grootel, Adam Burgasser, Michaël Gillon, James G. Ingalls, Emmanuël Jehin, Sean N. Raymond, Franck Selsis, Amaury H. M. J. Triaud, Thomas Barclay, Geert Barentsen, Steve B. Howell, Laetitia Delrez, Julien de Wit, Daniel Foreman-Mackey, Daniel L. Holdsworth, Jérémy Leconte, Susan Lederer, Martin Turbet, Yaseen Almleaky, Zouhair Benkhaldoun, Pierre Magain, Brett Morris, Kevin Heng, Didier Queloz

摘要:

TRAPPIST-1系统是第一个围绕超冷矮星运行的凌日行星系统。至少有七颗行星在半径和质量上与地球相似,以前曾被发现过这颗恒星。随后,作为K2任务的一部分,我们对TRAPPIST-1进行了观测,利用这些新数据,我们报告了最外层行星TRAPPIST-1h的18.77 d轨道周期的测量结果,该周期到目前为止还不受限制。这个值符合我们基于拉普拉斯关系的理论预期,并将TRAPPIST-1h作为复杂链的第七个成员,三体共振连接每个成员。我们发现TRAPPIST-1h的半径为0.727地球半径,平衡温度为173 K。我们还测量了恒星的旋转周期为3.3 d,并检测到一些与低活动,中年,晚M矮星一致的耀斑。

英文摘要:

The TRAPPIST-1 system is the first transiting planet system found orbiting an ultra-cool dwarf star. At least seven planets similar to Earth in radius and in mass were previously found to transit this host star. Subsequently, TRAPPIST-1 was observed as part of the K2 mission and, with these new data, we report the measurement of an 18.77 d orbital period for the outermost planet, TRAPPIST-1h, which was unconstrained until now. This value matches our theoretical expectations based on Laplace relations and places TRAPPIST-1h as the seventh member of a complex chain, with three-body resonances linking every member. We find that TRAPPIST-1h has a radius of 0.727 Earth radii and an equilibrium temperature of 173 K. We have also measured the rotational period of the star at 3.3 d and detected a number of flares consistent with a low-activity, middle-aged, late M dwarf.

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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