Issue |
A&A
Volume 394, Number 1, October IV 2002
|
|
---|---|---|
Page(s) | 225 - 229 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20021129 | |
Published online | 04 October 2002 |
Near-infrared imaging of RAFGL7009S*
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
Corresponding author: A. Zavagno, zavagno@observatoire.cnrs-mrs.fr
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 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 (
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 μm H2O ice absorption
(Ishii et al. [CITE]).
We estimate the YSO's age to be
2
104 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
© ESO, 2002
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