3 juillet - 6 juillet 2018


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



The large diversity and complementarity of current data paves the way to the golden area of the stellar physics. Stars are the building blocks of the Universe. Understanding their evolution is crucial to improve our knowledge from the formation and evolution of planetary systems to the chemical and dynamical evolution of galaxies, especially for the Milky Way.

The Gaia satellite provides distances from parallaxes both to a level of accuracy and for a so large number of stars never reached before. Asteroseismologie (CoRoT, Kepler) has emerged during the last decade, and is a unique and very powerful tool to investigate the interior of stars, probing the interior of giant stars. The ground based spectroscopic surveys (Gaia-ESO, APOGEE, LAMOST, GALAH) bring new insights on the surface properties and chemical composition of the stars. These data are and will be available for different stellar populations, allowing to characterize the structures of the Milky way, and to deduce decisive constrains (e.g. stellar ages, metallicity distribution, or masses) to a better understanding of the formation and evolution of the Milky Way, the main goal of Galactic archeology.

This workshop will focus on discussions about the advances in our understanding of stellar interiors and physical processes made possible by combining these data. It will focus also on the applications of new advances on the Galactic evolution and formation.

It happens at a crucial time, few months only after the publication of the last data release of Gaia (DR2, april 2018) ; one year after the validation of the futur seismic mission PLATO ; and at the apogee of the exploitation os asteroseismic data Kepler, K2 and spectroscopic as Gaia-ESO, APOGEE, LAMOST, ou GALAH.

The goal of this workshop is to bring together the different french community involved in different projects (spectrosocopiste, asterosismologues, and modeler in stellar and galactic evolutions) to a better understanding of stars, and galactic archeology. Attention will also be given to future missions and surveys as PLATO (2025) and spectroscopic surveys WEAVE (2018) ou 4MOST (2020).

Invited talks

Après midi de JOUR
Session 1 Chair : Céline Reylé
2:00pm-2:30pm Andrea Miglio : Asteroseismology as a tool for astrophysics: from the deep interiors of stars to the evolution of the Milky Way
2:30pm-2:50pm Mansour BENBAKOURA : Red giants in eclipsing binaries: key systems to test asteroseismic scaling relations
2:50pm- 3:20pm Ana Palacios : New insights on stellar physics in the era of large surveys
3:20pm- 3:40pm Nadège Lagarde : New population synthesis approach : a golden way to deep inside the Gaia-ESO giants
3:40pm- 3:45pm Posters session
3:45- 4:15
Pause café
Session 2 Chair : Nadège Lagarde
4:15pm- 4:45pm Carine Babusiaux : Gaia et l'archéologie galactique
4:45pm- 5:15pm Vanessa Hill : Grands relevés d'Archéologie Galactique en complément à Gaia avec WEAVE
5:15pm- 5:35pm Clément Hottier : Distribution de la poussière et des étoiles dans le disque galactique
5:35pm- 5:55pm Khoperskov Sergey : Chemodynamical modeling of thick disk formation and star formation quenching in Milky Way-type galaxies
5:55pm- 6:15pm David VALLS-GABAUD : The impact of the MESSIER mission on the study of the Galaxy

e-posters in this session

MIRET ROIG NúriaUnravelling the mass function of IC 4665e-poster (click to see)
Van der swaelmen MathieuCommunicate with flags!e-poster (click to see)
Van der swaelmen MathieuChemical evolution of the Large Magellanic Cloude-poster (click to see)