Near-infrared imaging of RAFGL7009S

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 c...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Astronomy and astrophysics (Berlin) 2002-10, Vol.394 (1), p.225-229
Hauptverfasser: Zavagno, A., Deharveng, L., Nadeau, D., Caplan, J.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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 μm H2O ice absorption (Ishii et al. [CITE]). We estimate the YSO's age to be 2$\times$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.
ISSN:0004-6361
1432-0746
1432-0756
DOI:10.1051/0004-6361:20021129