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 …

We present the detection of neutral helium at 10833 Å in the atmosphere of WASP-52b and
tentative evidence of helium in the atmosphere of the grazing WASP-177b, using high …

The He I λ10833 Å triplet is a powerful tool for characterising the upper atmosphere of
exoplanets and tracing possible mass loss. Here, we analysed one transit of GJ 1214 b …

We analyze two high-resolution spectral transit time series of the hot Jupiter HAT-P-32 b
obtained with the CARMENES spectrograph. Our new XMM-Newton X-ray observations of …

Ultra-hot Jupiters are highly irradiated gas giants with equilibrium temperatures typically
higher than 2000 K. Atmospheric studies of these planets have shown that their transmission …

The metastable helium triplet in the near-infrared (10 833 Å) is among the most important
probes of exoplanet atmospheres. It can trace their extended outer layers and constrain …

Characterisation of atmospheres undergoing photo-evaporation is key to understanding the
formation, evolution, and diversity of planets. However, only a few upper atmospheres that …

Context. Because of its proximity to an active K-type star, the hot Jupiter WASP-80b has
been identified as a possible excellent target for detecting and measuring He I absorption in …

Atmospheric escape is considered to be one of the main channels for evolution in sub-
Jovian planets, particularly in their early lives. While there are several hypotheses proposed …

Models of exoplanet atmospheres based on Parker wind density and velocity profiles are a
common choice in fitting spectroscopic observations tracing planetary atmospheric escape …