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arXiv 0909.2299astro-ph.SRastro-ph.EP
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特殊的太阳成分及其与行星形成的可能关系

The peculiar solar composition and its possible relation to planet formation

Jorge Melendez, Martin Asplund, Bengt Gustafsson, David Yong

摘要:

我们进行了差异元素丰度分析的前所未有的准确性(0.01德克斯)的太阳相对于11个太阳孪生从依巴谷目录和10个太阳类似物从行星搜索。我们发现,太阳显示出一个特征的签名与一个~20%的消耗耐火元素相对于挥发性元素相比,太阳孪生。丰度差异与元素的冷凝温度密切相关。这一特点也适用于与已知有近距离巨行星的太阳类似物的比较,而大多数太阳类似物在径向速度监测中没有发现这样的巨行星,显示出太阳丰度模式。我们讨论了对这种特殊性的各种解释,包括丰度模式的差异与像我们这样的行星系统的形成有关的可能性,特别是与类地行星的存在有关。

英文摘要:

We have conducted a differential elemental abundance analysis of unprecedented accuracy (0.01 dex) of the Sun relative to 11 solar twins from the Hipparcos catalogue and 10 solar analogs from planet searches. We find that the Sun shows a characteristic signature with a ~20% depletion of refractory elements relative to the volatile elements in comparison with the solar twins. The abundance differences correlate strongly with the condensation temperatures of the elements. This peculiarity also holds in comparisons with solar analogs known to have close-in giant planets while the majority of solar analogs found not to have such giant planets in radial velocity monitoring show the solar abundance pattern. We discuss various explanations for this peculiarity, including the possibility that the differences in abundance patterns are related to the formation of planetary systems like our own, in particular to the existence of terrestrial planets.

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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