论文标题
通过失控的群众损失，在质量拉迪乌斯飞机上拆除热土星
Removal of Hot Saturns in Mass-Radius Plane by Runaway Mass Loss
论文作者
论文摘要
热土星种群在Mass-Radius空间中表现出一个边界，因此在小于$ \ sim $ 0.1 g cm $^{ - 3} $的密度下没有观察到行星。然而，行星内部结构模型可以轻松地构造诸如半径膨胀的自然结果之类的物体。在这里，我们通过构建包括半径膨胀，光蒸发性质量损失和Roche Lobe溢出的简单处方的内部结构模型来研究XUV驱动的质量损失在雕刻密度边界中的作用。我们证明，随着气体层被剥离，由于绝热半径膨胀而导致的失控的质量损失，蓬松的行星比$ \ sim $ 0.1 g cm $^{ - 3} $经历了失控的质量损失，从而很好地解释了Mass-Radius空间中观察到的边缘。在半径周期和质量周期空间中，该过程也可以看到，尽管较小的高卵线行星仍然可以在短时间内生存，从而保留了地层时种群分布的部分记录。
The hot Saturn population exhibits a boundary in mass-radius space, such that no planets are observed at a density less than $\sim$0.1 g cm$^{-3}$. Yet, planet interior structure models can readily construct such objects as the natural result of radius inflation. Here, we investigate the role XUV-driven mass-loss plays in sculpting the density boundary by constructing interior structure models that include radius inflation, photoevaporative mass loss and a simple prescription of Roche lobe overflow. We demonstrate that planets puffier than $\sim$0.1 g cm$^{-3}$ experience a runaway mass loss caused by adiabatic radius expansion as the gas layer is stripped away, providing a good explanation of the observed edge in mass-radius space. The process is also visible in the radius-period and mass-period spaces, though smaller, high-bulk-metallicity planets can still survive at short periods, preserving a partial record of the population distribution at formation.
