Planets with radii between that of the Earth and Neptune (hereafter referred to as 'sub-
Neptunes') are found in close-in orbits around more than half of all Sun-like stars,. However …

We use Keck/NIRSPEC to survey a sample of of young (< 1 Gyr), short-period mini-
Neptunes orbiting nearby K dwarfs to measure their mass loss via the metastable helium …

We present an empirical model of age-dependent photospheric lithium depletion, calibrated
using a large homogeneously analysed sample of 6200 stars in 52 open clusters, with ages …

Lava worlds belong to a class of short orbital period planets reaching dayside temperatures
high enough to melt their silicate crust. Theory predicts that the resulting lava oceans outgas …

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 …

Many of the confirmed short-period super-Earths and smaller sub-Neptunes are sufficiently
irradiated for the surface silicates to be sustained in a long-lasting molten state. While there …

We report the discovery, mass, and radius determination of TOI-1801 b, a temperate mini-
Neptune around a young M dwarf. TOI-1801 b was observed in TESS sectors 22 and 49 …

We report a search for excess absorption in the 1083.2 nm line of ortho (triplet) helium
during transits of TOI-1807b and TOI-2076b, 1.25 and 2.5-R⊕ planets on 0.55-and 10.4-d …

Context. TOI-2076 is a transiting three-planet system of sub-Neptunes orbiting a bright (G=
8.9 mag), young (340±80 Myr) K-type star. Although a validated planetary system, the orbits …

The number of exoplanets discovered already exceeds 5000 and continues to increase
daily. The characterization of exoplanets will be the main goal of future space missions. The …