SCYON Abstract

Received on October 4 2007

On the nature of early-type emission line objects in NGC6611

AuthorsC. Martayan (1,2), M. Floquet (2), A.-M. Hubert (2), J. Fabregat (3), Y. Frémat (1), D. Baade (4), and C. Neiner (2)
Affiliation(1) Royal Observatory of Belgium, 3 avenue circulaire, 1180 Brussels, Belgium
(2) GEPI, Observatoire de Paris, CNRS, Université Paris Diderot; 5 place Jules Janssen, 92195 Meudon Cedex, France
(3) Observatorio Astronómico de Valencia, edifici Instituts d'investigació, Poligon la Coma, 46980 Paterna Valencia, Spain
(4) European Organisation for Astronomical Research in the Southern Hemisphere, Karl-Schwarzschild-Str. 2, D-85748 Garching b. München, Germany
To appear inSF2A 2007
ContactMartayan@oma.be
URL
Links NGC 6611

Abstract

The number and the nature of emission line stars in the young open cluster NGC6611 is still the object of debates. Due to the presence of a strong and variable nebulosity in the cluster, the number of emission line stars is highly depending on the technique and the resolution used for the observations. Thanks to observations with the ESO-WFI, in slitless spectroscopic mode, and with the VLT-GIRAFFE we have been able to disentangle the circumstellar and nebular emissions. We confirm the small number of true emission line objects and we precise their nature: mainly Herbig Be stars.