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arXiv 2305.09488astro-ph.EPastro-ph.SR
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热木星的周期分布不依赖于宿主恒星金属丰度

The Period Distribution of Hot Jupiters is Not Dependent on Host Star Metallicity

Samuel W. Yee, Joshua N. Winn

AI总结:

基于232颗凌星热木星和Gaia DR3同质金属丰度,本文发现热木星周期分布与宿主恒星金属丰度无关,并给出两种金属丰度测量的转换关系。

摘要:

类太阳恒星拥有近轨道巨行星(周期小于1年)的概率随恒星金属丰度增加。以往工作提供了证据,表明近轨道巨行星的周期分布也与金属丰度相关,暗示这类天体存在两种形成或演化路径,其中一种在高金属丰度环境中更可能发生。在此,我们利用由232颗凌星热木星组成的样本以及来自Gaia Data Release 3的同质推导金属丰度,检验热木星(P < 10天)周期分布作为宿主恒星金属丰度函数的差异。我们没有发现任何金属丰度依赖性的证据;贫金属恒星和富金属恒星周围热木星的周期分布无法区分。作为本研究的副产品,我们提供了Gaia Radial Velocity Spectrograph测得金属丰度与主序FGK恒星传统高分辨率光学光谱测得金属丰度之间的转换关系。

英文摘要:

The probability that a Sun-like star has a close-orbiting giant planet (period < 1 year) increases with stellar metallicity. Previous work provided evidence that the period distribution of close-orbiting giant planets is also linked to metallicity, hinting that there two formation/evolution pathways for such objects, one of which is more probable in high-metallicity environments. Here, we check for differences in the period distribution of hot Jupiters (P < 10 days) as a function of host star metallicity, drawing on a sample of 232 transiting hot Jupiters and homogeneously-derived metallicities from Gaia Data Release 3. We found no evidence for any metallicity dependence; the period distributions of hot Jupiters around metal-poor and metal-rich stars are indistinguishable. As a byproduct of this study, we provide transformations between metallicities from the Gaia Radial Velocity Spectrograph and from traditional high-resolution optical spectroscopy of main-sequence FGK stars.

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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