2002A&A...394..225Z


Query : 2002A&A...394..225Z

2002A&A...394..225Z - Astronomy and Astrophysics, volume 394, 225-229 (2002/10-4)

Near-infrared imaging of RAFGL 7009S.

ZAVAGNO A., DEHARVENG L., NADEAU D. and CAPLAN J.

Abstract (from CDS):

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 HII region G25.65+1.05, which may be excited by a B1V star. We have obtained JHK images of a 1' 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 (AV≥100mag), 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 3.1µm H2O ice absorption (Ishii et al., 2002AJ....124..430I). We estimate the YSO's age to be 2x104 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.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main sequence - stars: imaging - stars: individual: RAFGL 7009S

VizieR on-line data: <Available at CDS (J/A+A/394/225): table1.dat>

Nomenclature: Table 1: [ZDN2002] NNN (Nos 1-174).

CDS comments: G25.65+1.05 = [WBH98] 18316-0602.

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [SB86] S255 2 Rad 06 12 54.0 +17 59 23           ~ 5 0
2 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 382 0
3 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1583 0
4 RAFGL 2136 Y*O 18 22 26.52888 -13 30 14.0400           ~ 279 0
5 RAFGL 7009S HII 18 34 20.911 -05 59 42.23           ~ 207 0
6 [WC89] 034.26+0.15C HII 18 53 18.664 +01 15 00.44           ~ 5 0
7 SH 2-138 HII 22 32 45.7 +58 28 20           ~ 111 2

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2023.06.10-13:15:34

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