两类热交换器
Two Classes of Hot Jupiters
摘要：
我们确定了两类凌日行星，根据它们的平衡温度和Safronov数。我们研究各种可能的解释二分法。它可能反映了行星或微行星散射在决定行星迁移停止时的影响。另一种可能性是，一些行星比其他行星蒸发掉更多的质量。如果这个蒸发过程优先从行星中去除氦，那么随之而来的平均分子量的减少可能解释了为什么有些行星具有非常大的半径。
英文摘要：
We identify two classes of transiting planet, based on their equilibrium temperatures and Safronov numbers. We examine various possible explanations for the dichotomy. It may reflect the influence of planet or planetesimal scattering in determining when planetary migration stops. Another possibility is that some planets lose more mass to evaporation than others. If this evaporation process preferentially removes Helium from the planet, the consequent reduction in the mean molecular weight may explain why some planets have anomalously large radii.
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