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Astrometric Detection of Terrestrial Planets in the Habitable Zones of Nearby Stars with SIM PlanetQuest

机译:宇宙可居住区地面行星的天体测量探测  附近有sIm planetQuest的明星

摘要

SIM PlanetQuest (Space Interferometry Mission) is a space-borne Michelsoninterferometer for precision stellar astrometry, with a nine meter baseline,currently slated for launch in 2015. One of the principal science goals is theastrometric detection and orbit characterization of terrestrial planets in thehabitable zones of nearby stars. Differential astrometry of the target staragainst a set of reference stars lying within a degree will allow measurementof the target star's reflex motion with astrometric accuracy of 1micro-arcsecond in a single measurement. We assess SIM's capability for detection (as opposed to characterization byorbit determination) of terrestrial planets in the habitable zones of nearbysolar-type stars. We compare SIM's performance on target lists optimized forthe SIM and Terrestrial Planet Finder Coronograph (TPF-C) missions. Performanceis quantified by three metrics: minimum detectable planet mass, number and massdistribution of detected planets, and completeness of detections in each massrange. Finally, we discuss the issue of confidence in detections andnon-detections, and show how information from SIM's planet survey can enableTPF to increase its yield of terrestrial planets.
机译:SIM PlanetQuest(太空干涉测量任务)是一种用于精密恒星天文测量的星载迈克尔逊干涉仪,基线为9米,目前定于2015年发射。科学的主要目标之一是在天文钟可居住区探测和探测地球行星的轨道特性。附近的星星。目标恒星相对于一组度数内的参考恒星的差分天体测量法将允许以单次测量的1微弧秒的天体测量精度测量目标恒星的反射运动。我们评估了SIM在邻近太阳型恒星的宜居区域中探测(相对于定性定性的特征)陆地行星的能力。我们在针对SIM和地面行星搜索冠冕仪(TPF-C)任务优化的目标列表上比较了SIM的性能。性能由三个指标量化:可探测的最小行星质量,被探测的行星的数量和质量分布以及每个质量范围内的探测完整性。最后,我们讨论了对探测和非探测的信心问题,并展示了SIM的行星调查信息如何使TPF能够增加其地面行星的产量。

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