The observed exoplanet population features a gap in the radius distribution that separates smaller super-Earths ($\lesssim$1.7 Earth radii) from larger sub-Neptunes ($\sim$1.7--4 radii). While mass loss theories can explain many of this valley, it is difficult to reconcile them with potentially rising terrestrials beyond orbital periods $\sim$30 days. We investigate ability gas accretion during...

The hot Saturn population exhibits a boundary in mass-radius space, such that no planets are observed at density less than $\sim$0.1 g cm$^{-3}$. Yet, planet interior structure models can readily construct objects as the natural result of radius inflation. Here, we investigate role XUV-driven mass-loss plays sculpting by constructing include inflation, photoevaporative mass loss and simple pres...