Vivien Parmentier

LTT-9779 b is a planet from the 'hot Neptune desert', a region where worlds usually perish. But it survived thanks to a carbon cocoon: an atmosphere of carbon monoxide and carbon dioxide turned out to be so thick that it doesn't evaporate even at 2000°C. On top of that, this exoplanet reflects 80% o

The CRIRES+ spectrograph on the Very Large Telescope captured the faint light of the young super-Jupiter TWA5B and resolved the SiO lines—the main carrier of gaseous silicon. The detection with a signal-to-noise ratio of 7.5 means: silicon almost entirely floats in the gas phase, not locked in silic

Astronomers studied WASP-121 b, a gas giant always facing its star with one side. As the planet transited the star, they detected changes in light absorption: the eastern limb was hotter than the western, which destroys water and leaves carbon monoxide. This opens a method for scanning weather on su