论文标题
大型系外行星中，冲击驱动的大气损失的签名
Signatures of impact-driven atmospheric loss in large ensembles of exoplanets
论文作者
论文摘要
大规模系外行驶过境调查的结果表明，小行星半径的分布可能是通过大气损失雕刻的。这种原始大气的丧失存在几种可能的物理机制，每种都会产生不同的观察性特征。在这项研究中，我们通过N体模拟研究了由影响驱动的大气损失模式。我们将巨大影响的结果与人口统计学水平的结果进行了比较，与另一种常见的大气损失方法的结果：光蒸发。然后，在同一组行星上应用两种不同的损失处方，然后检查具有保留原始气氛的行星的产生分布。由于进行了比较，我们确定了两种新的途径来辨别工作中主要的大气损失机制。这两种途径都涉及使用Transit多样性作为诊断性，在检查后续大气和径向速度调查的结果时。
The results of large-scale exoplanet transit surveys indicate that the distribution of small planet radii is likely sculpted by atmospheric loss. Several possible physical mechanisms exist for this loss of primordial atmospheres, each of which produces a different set of observational signatures. In this study, we investigate the impact-driven mode of atmosphere loss via N-body simulations. We compare the results from giant impacts, at a demographic level, to results from another commonly-invoked method of atmosphere loss: photoevaporation. Applying two different loss prescriptions to the same sets of planets, we then examine the resulting distributions of planets with retained primordial atmospheres. As a result of this comparison, we identify two new pathways toward discerning the dominant atmospheric loss mechanism at work. Both of these pathways involve using transit multiplicity as a diagnostic, in examining the results of follow-up atmospheric and radial velocity surveys.
