Transit surveys indicate that there is a deficit of Neptune-sized planets on close-in orbits. If
this" Neptune desert" is entirely cleared out by atmospheric mass loss, then planets at its …

The radius valley (or gap) in the observed distribution of exoplanet radii, which separates
smaller super-Earths from larger sub-Neptunes, is a key feature that theoretical models must …

Neptune-sized planets exhibit a wide range of compositions and densities, depending on
factors related to their formation and evolution history, such as the distance from their host …

Ultraviolet observations of ultrahot Jupiters, exoplanets with temperatures over 2000 K,
provide us with an opportunity to investigate if and how atmospheric escape shapes their …

During the first billion years of their life, exoplanet atmospheres are modified by different
atmospheric escape phenomena that can strongly affect the shape and morphology of the …

In the near-UV and optical transmission spectrum of the hot Jupiter WASP-121b, recent
observations have detected strong absorption features of Mg, Fe, Ca, and Hα, extending …

Atmospheric escape is a fundamental process that affects the structure, composition, and
evolution of many planets. The signatures of escape are detectable on close-in, gaseous …

The Neptunian desert is a region in period-radius parameter space with very few Neptune-
sized planets at short orbital periods. Amongst these, LTT 9779 b is the only known Neptune …

We present a study of photochemical hazes of exoplanet atmospheres based on a self-
consistent model including haze microphysics, disequilibrium chemistry, and radiative …

Among highly irradiated exoplanets, some have been found to undergo significant
hydrodynamic expansion traced by atmospheric escape. To better understand these …