The formation of stars and planets is a major theme of modern astrophysics. What the conditions for stellar formation ? How do young stars interact with their environment ? How do protoplanetary discs around young stars evolve and form planets ?
The ODYSSEY (Origin of Disks and Young Stellar Systems) team aims to understand how stars and their planets form. The team focuses on three main themes : the origin and evolution of young stellar clusters ; the evolution of gas and dust in protoplanetary discs ; the origin and impact of magnetic fields on young stars and their protoplanetary disc. The goal is to achieve a global understanding of the interactions between a star, its disc and its planets.
The team is strongly involved in observing programs in the mm to optical wavebands, using instruments developed at IPAG. Combining near-infrared to ultraviolet variability studies with spectropolarimetry constrains the dynamics of accretion-ejection processes in young stars and allows to map their magnetic fields (ESPaDOnS, SPIRou). High angular resolution imaging (SPHERE) and interferometry (PIONIER, GRAVITY, MATISSE, ALMA, NOEMA) reveal time-dependent structures in the discs around young stars. These structures trace the physical and chemical processes in the disc, and can signal the presence of planets being formed. The evolution of young stars is also influenced by their environment, with GAIA providing new handles on this question. Numerical models and simulations are developed at IPAG to support the interpretation of all these data, mostly using the in-house radiative transfer code MCFOST.
Protoplanetary disks ; planet formation ; planet-disk and planet-star interactions ; stars : activity, jets, winds, outflows, kinematics and dynamics, pre-main sequence, protostars, Herbig-Haro, T Tauri ; magnetic fields ; polarization ; dust, extinction ; radiative transfer.
Team leader : Catherine Dougados
Email : catherine.dougados (at) univ-grenoble-alpe.fr
Telephone : 04 76 63 55 32 (from abroad +33 4 76 63 55 32)