The Gaia satellite: a tool for Emission Line Stars and Hot Stars
Christophe Martayan (GEPI), Yves Fremat, Ronny Blomme, Anthony, Jonckheere, Marcelo Borges, Bertrand De Batz (GEPI), Bernard Leroy (LESIA),, Rosanna Sordo, Jean-Claude Bouret (LAM), Fabrice Martins (GRAAL), Jean Zorec, (IAP), Coralie Neiner (GEPI), Yael Naz\'e, Evelyne Alecian
TL;DR
The Gaia satellite will observe and analyze over a billion stars, including emission line and hot stars, providing valuable astrophysical data and classifications for stars in the Milky Way and nearby galaxies.
Contribution
This paper introduces the Gaia satellite's capabilities and the developed codes for automatic classification and parameter estimation of emission line and hot stars.
Findings
Gaia will observe at least 1 billion stars.
The team developed codes for automatic spectral classification.
Astrophysical parameters will be derived for stars in the Milky Way and nearby galaxies.
Abstract
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.
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Astronomical Observations and Instrumentation