The rotation of a star and the revolutions of its planets are not necessarily aligned. This
article reviews the measurement techniques, key findings, and theoretical interpretations …

Context. Ultra-hot Jupiters are excellent laboratories for the study of exoplanetary
atmospheres. WASP-121b is one of the most studied; many recent analyses of its …

Context. WASP-121 b is a hot Jupiter that was recently found to possess rich emission (day
side) and transmission (limb) spectra, suggestive of the presence of a multitude of chemical …

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 …

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 …

Abstract Observing the Rossiter–McLaughlin effect during a planetary transit allows the
determination of the angle λ between the sky projections of the star's spin axis and the …

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 …

Context. High-resolution spectroscopy studies of ultra-hot Jupiters have been key in our
understanding of exoplanet atmospheres. Observing into the atmospheres of these giant …

KELT-9 b, the hottest known exoplanet, with T eq~ 4400 K, is the archetype of a new planet
class known as ultra-hot Jupiters. These exoplanets are presumed to have an atmosphere …