Massive Stars in the Gaia-ESO Survey

Blomme, Ronny; Fremat, Yves; Lobel, Alex; Maíz Apellániz, Jesús; Morel, Thierry; Negueruela, Ignacio; Semaan, Thierry
Massive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece; Online at, id.55 (2013).


The Gaia-ESO Survey (GES) is an ambitious project to study the formation and evolution of the Milky Way and its stellar populations. It is led by Gerry Gilmore and Sofia Randich and includes about 350 Co-Investigators. During 300 nights (spread over 5 years) of order 10^5 Giraffe spectra and 10^4 UVES spectra will be taken. As part of the survey, about 13 clusters will be observed that were chosen specifically for their massive-star content. We report on the preliminary analysis of GES data from two such clusters: NGC 3293 and NGC 6705. We determine stellar parameters for the B-type stars in NGC 3293 and compare the A-type stars population between the two clusters. We also use a repeat observation to study binarity and use the radial velocity information to study cluster membership in NGC 3293. We also list our plans for future observations, which include the Carina nebula region.