Extended Data Fig. 1: The distributions of density, separation and Jean parameter λ for planets with different driving mechanisms.
From: Characterization of the regimes of hydrodynamic escape from low-mass exoplanets
The symbols are the same as those in Fig. 2. (a) the distributions of λ and XUV flux; (b) the distributions of separation and mean density. In generally, the planets have smaller density if their hydrodynamic escapes are TE- and tidally-driven. In contrast, the trend is contrary to the planets with XUV-driven. For TE-driven escape, their λ values are smaller than ∼3. For tidally-driven escape, the values of λ* is smaller than 3. In the regime of tidally-XUV-driven transition regime, the values of λ* are in the range of 3-6. The values of λ* are greater than 6 in XUV-driven regime (see Fig. 1).
