论文标题
CHES：用于检测附近太阳能型星星可居住行星的太空式天文任务
CHES: a space-borne astrometric mission for the detection of habitable planets of the nearby solar-type stars
论文作者
论文摘要
提议近距离居住的系外行星调查（CHES）任务，以发现附近太阳能型星的宜居地球状行星（$ \ sim 10〜 \ Mathrm {pc} $远离我们的太阳能系统）通过微弧形相对星形统计。 CHES的主要科学目标是：在绕着附近100 FGK的可居住区中寻找地球双胞胎或陆地行星；进一步进行全面的调查并广泛地描述了附近的行星系统。主要有效载荷是高质量，低稳定，高稳定性望远镜。光学子系统是一个同轴三晶Anastigmat（TMA），其$ 1.2 \ MATHRM {〜M} $ - aperture，$ 0.44^{\ circ} \ times 0.44^{\ circ} $ nm} $ nm} $ nm} $ nm} $ nm nm} $ nm nm nm nm} $ nm}相机焦平面由81个马赛克科学CMOS探测器组成，每个检测器$ 4 \ mathrm {〜k} \ times 4 \ mathrm {〜k} $ Pixels。使用杂化激光干涉校准技术来确保微弧形级别（1 $μ$ AS）相对天体测量精度，以满足检测类似地球行星的要求。 Ches卫星在Sun-Earth L2点运行，并观察整个目标恒星5年。 CHE将根据来自太空的微弧形星形统计，将首次直接测量地球双胞胎和地球双胞胎和超级地球的倾向。这肯定会增强我们对附近各种行星系统形成的理解，以及太阳能恒星的其他世界的出现，最后反映出我们自己的太阳系的演变。
The Closeby Habitable Exoplanet Survey (CHES) mission is proposed to discover habitable-zone Earth-like planets of the nearby solar-type stars ($\sim 10~\mathrm{pc}$ away from our solar system) via micro-arcsecond relative astrometry. The major scientific objectives of CHES are: to search for Earth Twins or terrestrial planets in habitable zones orbiting 100 FGK nearby stars; further to conduct a comprehensive survey and extensively characterize the nearby planetary systems. The primary payload is a high-quality, low-distortion, high-stability telescope. The optical subsystem is a coaxial three-mirror anastigmat (TMA) with a $1.2 \mathrm{~m}$-aperture, $0.44^{\circ} \times 0.44^{\circ}$ field of view and $500 \mathrm{~nm}-900 \mathrm{~nm}$ working waveband. The camera focal plane is composed of 81 MOSAIC scientific CMOS detectors each with $4 \mathrm{~K} \times 4 \mathrm{~K}$ pixels. The heterodyne laser interferometric calibration technology is employed to ensure micro-arcsecond level (1 $μ$as) relative astrometry precision to meet the requirements for detection of Earth-like planets. CHES satellite operates at the Sun-Earth L2 point and observes the entire target stars for 5 years. CHES will offer the first direct measurements of true masses and inclinations of Earth Twins and super-Earths orbiting our neighbor stars based on micro-arcsecond astrometry from space. This will definitely enhance our understanding of the formation of diverse nearby planetary systems and the emergence of other worlds for solar-type stars, and finally to reflect the evolution of our own solar system.
