论文标题
经过白色矮人的地球状行星的高分辨率光谱和生物签名
High-resolution Spectra and Biosignatures of Earth-like Planets Transiting White Dwarfs
论文作者
论文摘要
随着碎屑盘以及围绕白色矮人的拟议行星的首次观察，如何将这种恒星残留物周围的岩石行星进行表征和探测以确保生命迹象的问题。白色矮人的大小与地球相似，并且在初始冷却后具有数十亿年的相对稳定的环境，这使它们成为系外行星搜索和陆地行星大气表征的引人入胜的目标。它们的尺寸很小，并且产生的大行星过境信号允许使用下一代望远镜进行观察，以探测这种岩石行星的大气（如果存在）。我们为行星的高分辨率传输光谱对绕着白色矮人的行星进行了模拟，因为它们从6,000-4,000 k冷却，对于i）i）接收到现代地球的等效照射的行星，ii）行星在冷却的白色矮人周围绕着距离绕的行星，可以在宜居区中最长的连续时间。所有高分辨率传输光谱将在本研究发布后在线公开可用，可以用作使用JWST，极大的望远镜以及Origins，Habex和Luvoir等任务概念来准备和解释即将进行的观察的工具。
With the first observations of debris disks as well as proposed planets around white dwarfs, the question of how rocky planets around such stellar remnants can be characterized and probed for signs of life becomes tangible. White dwarfs are similar in size to Earth and have relatively stable environments for billions of years after initial cooling, making them intriguing targets for exoplanet searches and terrestrial planet atmospheric characterization. Their small size and the resulting large planet transit signal allows observations with next generation telescopes to probe the atmosphere of such rocky planets, if they exist. We model high-resolution transmission spectra for planets orbiting white dwarfs from as they cool from 6,000-4,000 K, for i) planets receiving equivalent irradiation to modern Earth, and ii) planets orbiting at the distance around a cooling white dwarf which allows for the longest continuous time in the habitable zone. All high-resolution transmission spectra will be publicly available online upon publication of this study and can be used as a tool to prepare and interpret upcoming observations with JWST, the Extremely Large Telescopes as well as mission concepts like Origins, HabEx, and LUVOIR.
