Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation,
and these losses can affect their physical and chemical evolution. Studies of atmospheric …

Observational evidence for escaping exoplanet atmospheres has been obtained for a few
exoplanets to date. It comes from strong transit signals detected in the ultraviolet, most …

Context. The detection of radio emissions from exoplanets will open up a vibrant new
research field. Observing planetary auroral radio emission is the most promising method to …

Abstract Theory suggests that the orbits of some close-in giant planets should decay due to
tidal interactions with their host stars. To date, WASP-12b is the only hot Jupiter reported to …

We present the detection of helium in the extended atmosphere of the sub-Saturn WASP-
107b using high-resolution (R≈ 25,000) near-infrared spectra from Keck II/Near Infrared …

Context. Several observational and theoretical results indicate that the atmospheric
temperature of the ultra-hot Jupiter KELT-9b in the main line formation region is a few …

We present a survey of far-ultraviolet (FUV; 1150–1450 Å) emission line spectra from 71
planet-hosting and 33 non-planet-hosting F, G, K, and M dwarfs with the goals of …

The metastable helium (He*) lines near 10830 Å are ideal probes of atmospheric erosion—a
common phenomenon of close-in exoplanet evolution. A handful of exoplanet observations …

The exoplanet WASP-12b is the prototype for the emerging class of ultrahot, Jupiter-mass
exoplanets. Past models have predicted–and near-ultraviolet observations have shown–that …

This paper presents simulations of the metastable helium (He*) observations of WASP-107b,
so far the highest signal-to-noise ratio detection that is confirmed by three different …