EDP Sciences
Free access
Volume 394, Number 1, October IV 2002
Page(s) 225 - 229
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20021129

A&A 394, 225-229 (2002)
DOI: 10.1051/0004-6361:20021129

Near-infrared imaging of RAFGL7009S

A. Zavagno1, L. Deharveng1, D. Nadeau2 and J. Caplan1

1  Observatoire de Marseille, 2 place Le Verrier, 13248 Marseille Cedex 4, France
2  Observatoire du Mont Mégantic et Département de Physique, Université de Montréal, CP 6128, Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
    e-mail: nadeaud@ere.umontreal.ca

(Received 13 March 2002 / Accepted 29 July 2002)

RAFGL7009S is a deeply embedded massive young stellar objet (YSO) showing strong ice and saturated silicate absorption features in the mid infrared. It is associated with the ultracompact H II region G25.65+1.05, which may be excited by a B1V star. We have obtained JHK images of a $1\arcmin$ field centred on this YSO. In K we detect a non-resolved object coinciding with the radio continuum emission peak. Considering the high extinction towards this source ( $A_V \geq $ 100 mag), the observed K emission is more than 7 mag in excess of that expected for a B1V star. We suggest that this emission is mainly due to scattering of the central zone emission, as recently found for a sample of embedded massive YSOs associated with 3.1 $\mu$m H 2O ice absorption (Ishii et al. 2002). We estimate the YSO's age to be 2 $\times$10 4 years. The outflow, the methanol maser emission and the strong ice absorption features suggest the presence of a dense medium very close to the star, possibly a disk.

Key words: stars: formation -- stars: pre-main sequence -- stars: imaging -- stars: individual: RAFGL7009S

Offprint request: A. Zavagno, zavagno@observatoire.cnrs-mrs.fr

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