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arXiv 0811.2606astro-ph
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围绕恒星HR 8799运行的多行星的直接成像

Direct Imaging of Multiple Planets Orbiting the Star HR 8799

C. Marois, B. Macintosh, T. Barman, B. Zuckerman, I. Song, J. Patience, D. Lafreniere, R. Doyon

摘要:

对系外行星系统的直接成像是一种强大的技术,可以揭示宽轨道上的类地行星,可以详细描述行星大气,是对类地行星成像的关键一步。成像探测是具有挑战性的,由于小的角度分离和大的光度对比度之间的行星和它的宿主恒星的综合影响。凯克望远镜和双子座望远镜的高对比度观测揭示了三颗行星围绕恒星HR 8799运行,预计间距为24,38和68天文单位。多历元数据显示,所有三颗成像行星的轨道运动都是逆时针的。伴星的低光度和系统的估计年龄意味着行星质量是木星的5到13倍。这个系统类似于我们太阳系外部的放大版本。

英文摘要:

Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter-like planets in wide orbits, can enable detailed characterization of planetary atmospheres, and is a key step towards imaging Earth-like planets. Imaging detections are challenging due to the combined effect of small angular separation and large luminosity contrast between a planet and its host star. High-contrast observations with the Keck and Gemini telescopes have revealed three planets orbiting the star HR 8799, with projected separations of 24, 38, and 68 astronomical units. Multi-epoch data show counter-clockwise orbital motion for all three imaged planets. The low luminosity of the companions and the estimated age of the system imply planetary masses between 5 and 13 times that of Jupiter. This system resembles a scaled-up version of the outer portion of our Solar System.

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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