论文标题
宇宙氢和冰损
Cosmic Hydrogen and Ice Loss Lines
论文作者
论文摘要
我们使用氢和相关挥发物的逃生机制以及分子氢（H $ _2 $）分裂到原子氢（H）中的化学平衡计算，解释了系外星质量 - 拉迪乌斯图的总体平衡依赖性趋势。我们在质量拉迪乌斯图中识别两个宇宙氢和冰损（寒冷）。众所周知，气盘可在一千万年内散布。但是，富含气体的行星可能会在更长的时间范围内损失一些或几乎所有气体。因此，我们假设大多数从氢气主导的螺旋磁盘出生的行星始于拥有原始的H $ _2 $ -envelope。由于宿主 - 恒星辐射引起的逃生过程，该包膜逐渐丢失。
We explain the overall equilibrium-temperature-dependent trend in the exoplanet mass-radius diagram, using the escape mechanisms of hydrogen and relevant volatiles, and the chemical equilibrium calculation of molecular hydrogen (H$_2$) break-up into atomic hydrogen (H). We identify two Cosmic Hydrogen and Ice Loss Lines (CHILLs) in the mass-radius diagram. Gas disks are well known to disperse in ten million years. However, gas-rich planets may lose some or almost all gas on a much longer timescale. We thus hypothesize that most planets that are born out of a hydrogen-gas-dominated nebular disk begin by possessing a primordial H$_2$-envelope. This envelope is gradually lost due to escape processes caused by host-stellar radiation.
