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arXiv 1503.01771astro-ph.EP
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热与暖超级地球不同形成机制的证据

Evidence of Different Formation Mechanisms for Hot versus Warm Super-Earths

Wei Zhu

摘要:

利用Buchhave等人的开普勒行星样本和Schlaufman阐明的统计方法,我表明,短周期超级地球与长周期超级地球对宿主恒星金属丰度的依赖性不同,过渡期在70到100天的范围内。短周期超级地球的宿主平均比长周期超级地球的宿主更富含金属。这种过渡期的存在不能用任何单一的超级地球形成理论来解释,这表明超级地球至少通过两种机制形成。

英文摘要:

Using the Kepler planet sample from Buchhave et al. and the statistical method clarified by Schlaufman, I show that the shorter-period super-Earths have a different dependence on the host star metallicity from the longer-period super-Earths, with the transition period being in the period range from 70 to 100 days. The hosts of shorter-period super-Earths are on average more metal-rich than those of longer-period super-Earths. The existence of such a transition period cannot be explained by any single theory of super-Earth formation, suggesting that super-Earths have formed via at least two mechanisms.

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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