The Gaia satellite: a tool for Emission Line Stars and Hot Stars

Christophe Martayan (1, 2) , Yves Fremat (1) , Ronny Blomme (1) , Anthony Jonckheere (1) , Marcelo Borges (3) , Bertrand de Batz (2) , Bernard Leroy (4) , Rosanna Sordo (5) , Jean-Claude Bouret (6) , Fabrice Martins (7) , Jean Zorec (8) , Coralie Neiner (2) , Yael Nazé (9) , Evelyne Alecian (10) , Michele Floquet (2) , Anne-Marie Hubert (2) , Danielle Briot (2) , Anatholy Miroshnichenko (11) , Indrek Kolka (12) , Philippe Stee (3) , Thierry Lanz (13) , Georges Meynet (14)

1 ROB - Royal Observatory of Belgium = Observatoire Royal de Belgique
2 GEPI - Galaxies, Etoiles, Physique, Instrumentation
3 OCA - Observatoire de la Côte d'Azur
4 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
5 Padova Observatory, Italy
6 LAM - Laboratoire d'Astrophysique de Marseille
7 GRAAL - Groupe de Recherche en Astronomie et Astrophysique du Languedoc
8 IAP - Institut d'Astrophysique de Paris
9 Institut d'Astrophysique de Liège, Belgium
10 RMC Kingston, Canada
11 UNC - University of North Carolina [Chapel Hill]
12 Tartu Observatory
13 Department of Astronomy [College Park]
14 ObsGE - Observatoire Astronomique de l'Université de Genève

The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each star and spectra for stars till V magnitude equal to 17. After a general description of Gaia, we present the codes and methods, which are currently developed by our team. They will provide automatically the astrophysical parameters and spectral classification for the hot and emission line stars in the Milky Way and other close Local Group galaxies such as the Magellanic Clouds.

Mots clés: Emission-Line stars; Hot stars; GAIA; spectroscopy; spectrophotometry; classification

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

Christophe Martayan, Yves Fremat, Ronny Blomme, Anthony Jonckheere, Marcelo Borges, et al.. The Gaia satellite: a tool for Emission Line Stars and Hot Stars. 2008. ⟨hal-00324934⟩