论文标题
在观察到的亚北极和超级行星的群体中，H/HE信封的进化轨道
The evolutionary track of H/He envelope in the observed population of sub-Neptunes and Super-Earths planets
论文作者
论文摘要
由于对行星进化史的影响，对小行星发生率的局部降低（有时称为“差距”）的观察性检测是一个令人兴奋的发现。该差距似乎定义了一个过渡区域，在该区域中，据信，据信下螺旋的行星已经失去了H/HE信封，可能是由于光蒸发或核心巨额质量损失，因此已转化为裸露的核心地球行星。在这里，我们使用观察到的小型行星的真实样本以及将H/HE INVELOPE的包络演化模型与Mass-Radius图和光蒸发模型一起应用了H/HE INVELOPE的包膜演化模型，研究了亚脉冲和超级地点之间的过渡。我们发现光蒸发可以解释100myr中大多数超地球的H/HE膜损失，尽管在某些行星中似乎是必要的额外损失机制。我们探讨了这些行星家族具有不同核心质量的可能性，并在强烈辐照的超级诞生和亚北极子的原始人群中找到连续体。我们的分析还表明，R <3.5 r_oplus的近距离亚螺旋通常损失了约30％的原始包膜。
The observational detection of a localized reduction in the small planet occurrence rate, sometimes termed a 'gap', is an exciting discovery because of the implications for planet evolutionary history. This gap appears to define a transition region in which sub-Neptune planets are believed to have lost their H/He envelope, potentially by photoevaporation or core powered mass loss, and have thus been transformed into bare cores terrestrial planets. Here we investigate the transition between sub-Neptunes and super-Earths using a real sample of observed small close-in planets and applying envelope evolution models of the H/He envelope together with the mass-radius diagram and a photoevaporation model. We find that photoevaporation can explain the H/He envelope loss of most super-Earths in 100Myr, although an additional loss mechanism appears necessary in some planets. We explore the possibility that these planets families have different core mass and find a continuum in the primordial population of the strongly irradiated super-Earths and the sub-Neptunes. Our analysis also shows that close-orbiting sub-Neptunes with R < 3.5 R_oplus typically lose ~ 30% of their primordial envelope.
