论文标题
使用行星红外过量的新方法研究系外行星的大气
A New Method For Studying Exoplanet Atmospheres Using Planetary Infrared Excess
论文作者
论文摘要
迄今为止，观察者揭示外部大气大气的组成或热结构的能力已取决于两种技术：高对比度直接成像和转移系外行星的时间序列观察。前者目前仅限于表征年轻的，庞大的物体，而后者则需要接近90度轨道倾斜，因此将大气研究限制在总系外行星种群的一小部分。在这里，我们提出了一种观察和分析技术，用于研究非传输系外行星的大气，该技术依赖于从出色的光谱中获取同时的，宽波长的光谱和解决行星红外发射。该方法可以使用稀疏采样的相曲线观测值或一种机制来研究超级采样的大气动力学方法，或者一种机制，以搜索绕过最接近M-warf恒星（例如Proxima Centauri）的非传输系外行星上的生命迹象。如果证明对James Webb太空望远镜（JWST）观察有效，测量行星红外过量（PIE）的方法将打开附近大量的非传输外部球星，以进行大气表征。
To date, the ability for observers to reveal the composition or thermal structure of an exoplanet's atmosphere has rested on two techniques: high-contrast direct imaging and time-series observations of transiting exoplanets. The former is currently limited to characterizing young, massive objects while the latter requires near 90 degree orbital inclinations, thus limiting atmospheric studies to a small fraction of the total exoplanet population. Here we present an observational and analysis technique for studying the atmospheres of non-transiting exoplanets that relies on acquiring simultaneous, broad-wavelength spectra and resolving planetary infrared emission from the stellar spectrum. This method could provide an efficient means to study exoplanet atmospheric dynamics using sparsely-sampled phase curve observations or a mechanism to search for signs of life on non-transiting exoplanets orbiting the nearest M-dwarf stars (such as Proxima Centauri). If shown to be effective with James Webb Space Telescope (JWST) observations, the method of measuring planetary infrared excess (PIE) would open up the large population of nearby, non-transiting exoplanets for atmospheric characterization.
