Leader : Stéphane Charpinet
Deputy : Laurène Jouve
The research carried out by the members of the group PS2E aims to improve our understanding of stars, especially the closest of them, the Sun, as well as exoplanetary systems.
The neighborhood of the Sun
Close enough to be observed with precision, the stars near our Sun constitute a unique laboratory for our understanding of stellar physics and the galaxy. A research team of the […]
SPHERE, twenty years of challenges and successes for exoplanets
The SPHERE consortium celebrates its 100th scientific publication, including the demographic study of exoplanets beyond Saturn’s orbit. The SPHERE (Spectro-Polarimetric High-Contrast Exo-planet REsearch) exoplanet imager, currently installed and operating at […]
How do giant planets become eccentric?
The vast majority of giant exoplanets observed (planets 100 times heavier than the Earth) have very “eccentric” orbits: their trajectory does not follow a circle, unlike the Earth, but an […]
SPIRou stares at a young rebel: the AU Mic planetary system
SPIRou, the new spectropolarimeter / high-precision velocimeter recently installed on the 3.6m Canada-France-Hawaii Telescope (CFHT), allowed to measure the mass and density of a close-in Neptune-like planet orbiting the hugely-active […]
Neo-Narval, a new instrument at the summit of the Pic du Midi
Exoplanets are on a roll! This is evidenced by the 2019 Nobel Prize in Physics awarded to the Swiss Michel Mayor and Didier Queloz for their discovery of the first […]
Multiple rings in protoplanetary disks: one planet to govern them all
Recent observations of protoplanetary disks, these planetary systems in formation, frequently reveal sequences of dark and bright rings. While these structures are often attributed to multiple planets, numerical simulations show […]