Interferometry and adaptive optics allow us to observe the surface and the environment near the stars. Within the Stars and Galaxies research group and in collaboration with the Research Group High Angular Resolution in Astrophysics, the study at high angular resolution of stars includes the following topics :
- Characterisation of the final phases of stellar evolution (red giants and supergiants, Betelgeuse,…),
- Exploration of the stars in the Solar neighbourhood (Alpha and Proxima Centauri,…),
- Calibration of standard candels for the distance ladder and the measure of Hubble’s constant (Chepheids, RR Lyrae, binary stars,…).
This team uses the large ground-based infrastructures (VLT, optical interferometers VLTI and CHARA, millimetric interferometers ALMA and NOEMA, and soon ELT) as well as space-based (space telescopes Gaia, Hubble and James Webb).
