The Precision of Mass Measurements Required for Robust Atmospheric Characterization of Transiting Exoplanets
The Precision of Mass Measurements Required for Robust Atmospheric Characterization of Transiting Exoplanets
复制标题
DOI：
10.3847/2041-8213/ab4909
复制
发表时间：
2019-11-01
影响因子：
7.9
通讯作者：
Line, Michael R.
中科院分区：
文献类型：
--
作者：
Batalha, Natasha E.;Lewis, Taylor;Line, Michael R.
两颗凌日系外行星测量卫星？它的主要科学目标是测量50颗小于地球半径4倍的行星的质量，并为大气表征工作发现高质量的目标。重要的是，这两个目标是通过量化质量约束的精度来产生行星的强大大气特性。在这里，我们通过在各种假设下对模拟的詹姆斯韦伯太空望远镜透射光谱进行检索来解决这个问题，以确定行星质量的不确定性程度，并对从类地行星到温暖的海王星到热木星等七颗具有代表性的行星进行检索。只有对于无云、低金属丰度的气态巨行星，我们才能仅从透射光谱中推断出系外行星的质量。10%的准确率。对于金属丰度低的情况(
Two of Transiting Exoplanet Survey Satellite?s major science goals are to measure masses for 50 planets smaller than 4 Earth radii and to discover high-quality targets for atmospheric characterization efforts. It is important that these two goals are linked by quantifying what precision of mass constraint is required to yield robust atmospheric properties of planets. Here, we address this by conducting retrievals on simulated James Webb Space Telescope transmission spectra under various assumptions for the degree of uncertainty in the planets mass for a representative population of seven planets ranging from terrestrials to warm Neptunes to hot Jupiters. Only for the cloud-free, low-metallicity gas giants are we able to infer exoplanet mass from transmission spectroscopy alone, to ?10% accuracy. For low-metallicity cases (