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arXiv 0906.4904astro-ph.EP
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凌日行星HD 80606 b的自旋-轨道错位

Spin-orbit misalignement for the transiting planet HD 80606b

M. Gillon

摘要:

本文对过境行星HD 80606 b的日食光度学和视向速度进行了全球马尔可夫链蒙特卡罗分析。尽管缺乏完整的凌日光变曲线,但行星的大小测量精度很高(R_p = 1.04 + 0.05 - 0.09 R_Jup),同时轨道参数也得到了改进。这个全球分析显示,HD 80606 b的轨道轴相对于主星的自转轴有明显的倾斜(Beta = -59 +18-28度),提供了一个令人信服的证据,证明HD 80606 b的特殊轨道是由Kozai迁移机制造成的。

英文摘要:

A global Markov Chain Monte Carlo analysis of published eclipse photometry and radial velocities is presented for the transiting planet HD 80606b. Despite the lack of a complete transit light curve, the size of the planet is measured with a good level of precision (R_p = 1.04 +0.05-0.09 R_Jup), while the orbital parameters are refined. This global analysis reveals that the orbital axis of the planet is significatively inclined relative to the spin axis of the host star (Beta = -59 +18-28 deg), providing a compelling evidence that HD 80606b owes its peculiar orbit to the Kozai migration mechanism.

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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