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Search for Nearby Earth Analogs .III. Detection of 10 New Planets, 3 Planet Candidates, and Confirmation of 3 Planets around 11 Nearby M Dwarfs
The Astrophysical Journal Supplement Series ( IF 8.7 ) Pub Date : 2020-10-01 , DOI: 10.3847/1538-4365/abb139
Fabo Feng 1 , Stephen A. Shectman 2 , Matthew S. Clement 1 , Steven S. Vogt 3 , Mikko Tuomi 4 , Johanna K. Teske 1, 2 , Jennifer Burt 5 , Jeffrey D. Crane 2 , Bradford Holden 3 , Sharon Xuesong Wang 2 , Ian B. Thompson 2 , Matas R. Daz 2, 6 , R. Paul Butler 1
Affiliation  

Earth-sized planets in the habitable zones of M dwarfs are good candidates for the study of habitability and detection of biosignatures. To search for these planets, we analyze all available radial velocity data and apply four signal detection criteria to select the optimal candidates. We find 10 strong candidates satisfying these criteria and three weak candidates showing inconsistency over time due to data samplings. We also confirm three previous planet candidates and improve their orbital solutions through combined analyses of updated data sets. Among the strong planet candidates, HIP 38594 b is a temperate super-Earth with a mass of 8.21.7 M and an orbital period of 60.70.1 days, orbiting around an early-type M dwarf. Early-type M dwarfs are less active and thus are better hosts for habitable planets than mid-type and late-type M dwarfs. Moreover, we report the detection of five two-planet systems, including two systems made up of a warm or cold Neptune and a cold Jupiter, consistent with a positive correlation between these two types of planets. We also detect three temperate Neptunes, four cold Neptunes, and four cold Jupiters, contributing to a rarely explored planet population. Due to their proximity to the Sun, these planets on wide orbits are appropriate targets for direct imaging by future facilities such as the Habitable Exoplanet Observatory and the Extremely Large Telescope.



中文翻译:

搜索附近的地球类似物 .III。探测 10 颗新行星、3 颗候选行星,并确认附近 11 颗 M 矮星周围的 3 颗行星

M矮星宜居带中地球大小的行星是研究宜居性和检测生物特征的良好候选者。为了搜索这些行星,我们分析了所有可用的径向速度数据并应用四个信号检测标准来选择最佳候选者。我们发现 10 个满足这些标准的强候选者和三个弱候选者由于数据采样而随着时间的推移表现出不一致。我们还确认了之前的三个候选行星,并通过对更新数据集的综合分析来改进他们的轨道解决方案。在强大的候选行星中,HIP 38594 b 是一颗温带超级地球,质量为 8.21.7 M 公转周期为 60.70.1 天,围绕一颗早型 M 矮星公转。早型 M 矮星活动较少,因此比中型和晚型 M 矮星更适合居住行星。此外,我们报告了对五个双行星系统的检测,包括由温暖或寒冷的海王星和寒冷的木星组成的两个系统,这与这两种类型的行星之间的正相关一致。我们还探测到三颗温带海王星、四颗寒冷的海王星和四颗寒冷的木星,这些行星数量很少被探索。由于它们靠近太阳,这些轨道较宽的行星是未来设施(如宜居系外行星天文台和极大望远镜)直接成像的合适目标。

更新日期:2020-10-01
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