Emission-line Stars and Early-type Stars with Gaia

R. Blomme; Y. Frémat; A. Lobel; C. Martayan

doi:10.1051/eas/1045062

All issues

Volume 45 (2010)

EAS Publications Series, 45 (2010) 373-376

Abstract

Issue		EAS Publications Series Volume 45, 2010 GAIA: At the Frontiers of Astrometry


Page(s)		373 - 376
DOI		https://doi.org/10.1051/eas/1045062
Published online		15 February 2011

GAIA: At the Frontiers of Astrometry
C. Turon, F. Meynadier and F. Arenou (eds)
EAS Publications Series, 45 (2010) 373-376

Emission-line Stars and Early-type Stars with Gaia

R. Blomme¹, Y. Frémat¹, A. Lobel¹ and C. Martayan²

¹ Royal Observatory of Belgium, Ringlaan 3, 1180 Brussel, Belgium
e-mail: Ronny.Blomme@oma.be
² ESO, Alonso de Cordova 3107, Vitacura, Santiago de Chile, Chile

Abstract

Gaia will provide accurate parallaxes, spectrophotometry and spectroscopy for hundreds of thousands of emission-line stars across the whole HR diagram. In preparation for the Gaia mission, we are developing algorithms to recognize and classify emission-line stars. A large collection of ground-based spectroscopic observations has been collected and will be used for testing and training the algorithms.

Gaia will also provide information on several millions of early-type stars. Determining accurate parameters for these stars from Gaia data only will be difficult due to the A_V – T_eff degeneracy.