论文标题
识别有趣的行星系统以进行未来的X射线观测
Identifying interesting planetary systems for future X-ray observations
论文作者
论文摘要
X射线对星空星际系统的观察对于增进我们对系外行星的理解很重要。这些观察结果允许研究超球星大气的光蒸发，在某些情况下，甚至对外行星大气的大小进行了估计。 SRG（Spectrum Roentgen Gamma）任务的德国 - 俄罗斯EROSITA仪器正在执行自1990年代以来的首次全套X射线调查，并提供X射线磁通量和系外宿主星的光谱，其体积比以前更大。使用新的Erosita数据以及XMM-Newton，Chandra和Rosat的档案数据，我们在能量有限的逃生场景下估计系外行星的质量损失率，并鉴定出几种具有强大X射线照射的外型球星和预期的质量损失，这些外部球星可以在其他波长的其他波长下进行随访。我们使用系跨球星大气的玩具模型对样品光谱进行建模，以预测哪些具有X射线任务（例如雅典娜）的外球星交出观测值将看起来像，并估算可观察到的X射线传输光谱，用于典型的热木星型外科外观。
X-ray observations of star-planet systems are important to grow our understanding of exoplanets; these observation allow for studies of photoevaporation of the exoplanetary atmosphere, and in some cases even estimations of the size of the outer planetary atmosphere. The German-Russian eROSITA instrument onboard the SRG (Spectrum Roentgen Gamma) mission is performing the first all-sky X-ray survey since the 1990s, and provides X-ray fluxes and spectra of exoplanet host stars over a much larger volume than was accessible before. Using new eROSITA data as well as archival data from XMM-Newton, Chandra and ROSAT we estimate mass loss rates of exoplanets under an energy-limited escape scenario, and identify several exoplanets with strong X-ray irradiation and expected mass-loss that are amenable to follow-up observations at other wavelengths. We model sample spectra using a toy model of an exoplanetary atmosphere to predict what exoplanet transit observations with future X-ray missions such as Athena will look like, and estimate the observable X-ray transmission spectrum for a typical Hot Jupiter-type exoplanet.
