2008AJ....136.1455Z

Query : 2008AJ....136.1455Z

2008AJ....136.1455Z - Astron. J., 136, 1455-1462 (2008/October-0)

Unveiling a compact cluster of massive and young stars in IRAS 17233-3606.

ZAPATA L.A., LEURINI S., MENTEN K.M., SCHILKE P., ROLFFS R. and HIERET C.

Abstract (from CDS):

We have analyzed sensitive high spatial resolution archival radio continuum data at 1.3, 2.0, 3.6, and 6.0 cm as well as the H2 O maser molecular line data obtained using the Very Large Array (VLA) in its hybrid AB configuration toward the high-mass star-forming region IRAS 17233-3606 (G351.78-0.54). We find nine compact radio sources associated with this region, six of them are new radio detections. We discuss the characteristics of these sources based mostly on their spectral indices and find that most of them appear to be optically thin or thick ultra- and hyper-compact H II regions ionized by B zero-age main-sequence stars. Furthermore, in a few cases the radio emission may arise from optically thick dusty disks and/or cores; however more observations at different wavelengths are necessary to firmly confirm their true nature. In addition, we compared our centimeter maps with the mid-infrared images from the Spitzer Space Observatory GLIMPSE survey revealing a cluster of young protostars in the region together with multiple collimated outflows, some of which might be related to the compact centimeter objects. Finally, we find that one of these centimeter objects, VLA2d, is well centered in an apparent strong and compact north-south bipolar outflow traced by OH masers and we therefore suggest that this object is energizing the latter.

Abstract Copyright: ∼

Journal keyword(s): H II regions - ISM: jets and outflows - masers - radio continuum: stars - stars: individual (IRAS 17233-3606, G351.78-0.54) - stars: pre-main sequence - techniques: interferometric

Nomenclature: Table 2, Fig.2: [ZLM2008] IRAC NN (Nos 1-10). Table 3, Figs 1, 2: [ZLM2008] VLA Na (Nos 1-5, 1a-1b, 2a-2d). Table 4: <%M [ZLM2008] Maser NN<%M (Nos 1-16).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
2 QSO J1626-2951 Bla 16 26 06.02084013 -29 51 26.9712990   18.41 20.5 17.6   ~ 452 1
3 [ZLM2008] VLA 1 Rad 17 26 42.2 -36 09 22           ~ 2 0
4 [ZLM2008] VLA 1a Rad 17 26 42.446 -36 09 14.89           ~ 2 0
5 [ZLM2008] IRAC 2 IR 17 26 42.529 -36 09 46.16           ~ 1 0
6 [ZLM2008] VLA 2a Rad 17 26 42.540 -36 09 17.95           ~ 6 0
7 [ZLM2008] VLA 2b Rad 17 26 42.540 -36 09 17.95           ~ 6 0
8 [ZLM2008] VLA 1b Rad 17 26 42.543 -36 09 17.92           ~ 2 0
9 [ZLM2008] VLA 2c Rad 17 26 42.609 -36 09 17.35           ~ 6 0
10 [ZLM2008] VLA 2d Rad 17 26 42.686 -36 09 17.05           ~ 5 0
11 [ZLM2008] VLA 2 Rad 17 26 42.7 -36 09 19           ~ 2 0
12 IRAS 17233-3606 HII 17 26 42.8 -36 09 17           ~ 98 0
13 [ZLM2008] IRAC 1 Y*? 17 26 42.845 -36 08 35.16           ~ 3 0
14 [ZLM2008] IRAC 3 Y*? 17 26 42.931 -36 09 40.72           ~ 2 0
15 [ZLM2008] VLA 3 Rad 17 26 42.934 -36 09 39.87           ~ 1 0
16 [ZLM2008] VLA 4 Rad 17 26 42.940 -36 09 09.31           ~ 1 0
17 [ZLM2008] IRAC 4 IR 17 26 42.950 -36 09 37.69           ~ 1 0
18 [ZLM2008] IRAC 5 IR 17 26 43.040 -36 09 18.38           ~ 1 0
19 [ZLM2008] IRAC 6 IR 17 26 43.075 -36 09 14.02           ~ 1 0
20 [ZLM2008] IRAC 7 IR 17 26 43.082 -36 09 46.48           ~ 1 0
21 [ZLM2008] IRAC 8 IR 17 26 43.555 -36 09 18.48           ~ 1 0
22 [ZLM2008] VLA 5 Rad 17 26 43.621 -36 09 16.31           ~ 2 0
23 [ZLM2008] IRAC 9 MIR 17 26 43.708 -36 09 17.94           ~ 1 0
24 [ZLM2008] IRAC 10 NIR 17 26 43.94 -36 09 11.0           ~ 1 0

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