3 juillet - 6 juillet 2018


S12 Synergie des grands surveys pour comprendre les étoiles : piliers de l’archéologie galactique

The impact of the MESSIER mission on the study of the Galaxy.

D. Valls-Gabaud & MESSIER collaboration

The MESSIER satellite has been designed for two major science goals: the detection of the "missing"

galaxies, and the filaments of the cosmic web. However, being the first full-sky UV-optical photometric

survey of the sky at extremely low surface brightness levels, the wealth of secondary science cases and their

discovery potential are huge. The impact for Galactic studies ranges from the chemical enrichment of the

interstellar medium though mass-loss episodes, to the properties of the dust grains in cirri through

simultaneous UV-optical time-domain studies of stellar variability, and the actual extent of debris discs, HII and

planetary nebulae at very low surface brightness. Another legacy product will be the first UV-optical

(200-1000 nm, in 6 bands) photometric catalogue of point sources across the full sky, in synergy with

Gaia, LSST and Euclid.