A nearby transiting rocky exoplanet that is suitable for atmospheric investigation
A nearby transiting rocky exoplanet that is suitable for atmospheric investigation
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附近一颗适合大气研究的凌日岩石系外行星
DOI：
10.1126/science.abd7645
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发表时间：
2021
期刊：
影响因子：
56.9
通讯作者：
Ribas I. et al.
中科院分区：
文献类型：
--
作者：
Trifonov T.;Caballero J. A.;Morales J. C.;Seifahrt A.;Ribas I. et al.
凌日系外行星的光谱可用于研究其大气特性和宜居性。结合径向速度（RV）和凌日数据可以提供有关系外行星物理特性的附加信息。我们探测到一颗凌日岩石行星，围绕附近的红矮星 Gliese 486 运行，轨道周期为 1.467 天。根据 RV 数据和光度曲线确定，Gliese 486 b 的质量为 2.81 个地球，半径为 1.31 个地球，不确定性为 5%。主星距离约 8.1 秒差距，J 波段星等约为 7.2，并且可以从地球的两个半球观测到。基于这些特性以及行星的短轨道周期和高平衡温度，我们表明这颗类地行星适合发射和传输光谱。
Spectroscopy of transiting exoplanets can be used to investigate their atmospheric properties and habitability. Combining radial velocity (RV) and transit data provides additional information on exoplanet physical properties. We detect a transiting rocky planet with an orbital period of 1.467 days around the nearby red dwarf star Gliese 486. The planet Gliese 486 b is 2.81 Earth masses and 1.31 Earth radii, with uncertainties of 5%, as determined from RV data and photometric light curves. The host star is at a distance of ~8.1 parsecs, has aJ-band magnitude of ~7.2, and is observable from both hemispheres of Earth. On the basis of these properties and the planet’s short orbital period and high equilibrium temperature, we show that this terrestrial planet is suitable for emission and transit spectroscopy.