Simultaneous characterization of the atmospheres,surfaces,and exomoons of nearby rocky exoplanets  

作　　者：WenLiang Cui JinSu Zhang Frederic Schmidt Duo Cui XiaoMeng Huang Tong Li Feng Tian 

机构地区：[1]Ministry of Education Key Laboratory for Earth System Modeling,Department for Earth System Science,Tsinghua University [2]Department of Physics,Tsinghua University [3]GEOPS,Univ.Paris-Sud,CNRS,Université Paris-Saclay

出　　处：《Earth and Planetary Physics》2018年第3期247-256,共10页地球与行星物理（英文版）

基　　金：supported by the National Natural Science Foundation of China(1166116101,4164104);supported by the National Natural Science Foundation of China(41375102);support from the Spark Program,Tsinghua University;support from "Institute National des Sciences de l’Univers"(INSU);the "Centre National de la Recherche Scientifique"(CNRS) and "Centre National d’Etude Spatiale"(CNES),through the "Programme National de Planétologie";the PICS program;MEX/OMEGA;MEX/PFS programs

摘　　要：Atmospheric composition is an important indicator of habitability and life.The presence or absence of a large exomoon around an Earth-size exoplanet could have important consequences for planet climate stability.Thus the detection of exomoons and retrieval of information regarding atmospheric composition of Earth-size exoplanets are important goals of future exoplanet observations.Here a data analysis method is developed to achieve both goals simultaneously,based on reflection spectra of exoplanet-exomoon systems.We show that the existence of exomoons,the size of exomoons,and the concentrations of some atomic and molecular species in the atmospheres of their hosting Earth-like exoplanets can be retrieved with high levels of reliability.In addition,the method can provide well-constrained fractions of basic surface types on the targets because of the characteristic spectral features of atmospheric species and surface types in the analyzed spectral range.Atmospheric composition is an important indicator of habitability and life.The presence or absence of a large exomoon around an Earth-size exoplanet could have important consequences for planet climate stability.Thus the detection of exomoons and retrieval of information regarding atmospheric composition of Earth-size exoplanets are important goals of future exoplanet observations.Here a data analysis method is developed to achieve both goals simultaneously,based on reflection spectra of exoplanet-exomoon systems.We show that the existence of exomoons,the size of exomoons,and the concentrations of some atomic and molecular species in the atmospheres of their hosting Earth-like exoplanets can be retrieved with high levels of reliability.In addition,the method can provide well-constrained fractions of basic surface types on the targets because of the characteristic spectral features of atmospheric species and surface types in the analyzed spectral range.

关 键 词：EXOPLANET BIOSIGNATURE exomoon 

分 类 号：P35[天文地球—空间物理学]