2000A&A...357.1020P


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.20CET03:56:58

2000A&A...357.1020P - Astronomy and Astrophysics, volume 357, 1020-1030 (2000/5-3)

The NGC 6334 IV massive star formation site: a cluster in the making?

PERSI P., TAPIA M. and ROTH M.

Abstract (from CDS):

Sub-arcsecond JHK images of the star formation region NGC 6334 IV covering 14.7arcmin2 have been obtained. These were supplemented by H2 and Brγ images of the central 2arcmin2. A total of 1238sources brighter than K≃17 were detected. Due to the very high extinction in this region, only 685 of these are brighter at 1.2µm than our limit, J≃20. Only less than 5% of the sources exhibit excess emission at λ>2.0µm and they are scattered over the whole area covered. No evidence of a developed stellar cluster was found, but a small number of luminous (O-B2) young stellar objects were detected. These are embedded in the densest part of the molecular cloud that is at the centre of a giant bipolar structure seen in the radio and the infrared. This morphology is the result of the effect of massive stellar winds originating from the centre of a dense molecular toroid which collimates the outflow material giving rise to two lobes of thermal gas and dust emission. We confirm that the extinction is higher toward the southern lobe than toward the northen one but both are less reddened than their immediate surroundings. A new centre of active massive star formation is reported to the east of the central region. Close to a (sub)millimeter emission peak, a large infrared nebula with several point-like sources was found at 2.2µm. The discovery of a small embedded low-luminosity bipolar object in the vicinity of one of the giant lobes is also reported.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: clouds - ISM: dust, extinction - ISM: HII regions - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/357/1020): table1.dat>

Nomenclature: Table 1(paper): [PTR2000] 1-NN (Nos 1-1 to 1-32). Table 2: [PTR2000] cN (Nos c1-c7). Table 3: [PTR2000] MM3 Irs N (Nos 3-1 to 3-8). p.1028: [PTR2000] 171700.42-355301.9 N=1. Electronic Table: [PTR2000] HHMMSS.sss+DDMMSS.ss N=1238.

Status in Simbad:  could be processed

Simbad objects: 28

goto View the reference in ADS

Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 3576 HII 11 11 49.8 -61 18 14           ~ 222 2
2 [PTR2000] c2 IR 17 16 56.26 -35 51 37.1           ~ 1 0
3 [KDJ99] NGC 6334IV 3E IR 17 16 56.27 -35 51 54.4           ~ 3 0
4 [PTR2000] c4 IR 17 16 56.40 -35 51 54.4           ~ 1 0
5 [KDJ99] NGC 6334IV 6 IR 17 16 57.00 -35 51 49.8           ~ 2 0
6 [PTR2000] B171700.42-355301.9 red 17 17 00.42 -35 53 01.9           ~ 1 0
7 NAME NGC 6334-IV Cl* 17 20 17 -35 54.9           ~ 40 1
8 [HTK2008] IRN IV-2 Y*O 17 20 17.8 -35 54 53           ~ 13 0
9 GGD 25 HH 17 20 18 -35 54.3           ~ 24 0
10 NGC 6334A HII 17 20 19.3 -35 54 55           ~ 113 0
11 [HG83] IRS-IV-2 Y*O 17 20 19.3 -35 54 05           ~ 10 0
12 [PTR2000] c7 Rad 17 20 19.5 -35 54 42           ~ 3 0
13 JCMTSF J172022.1-355538 Rad 17 20 22.2 -35 55 44           ~ 4 0
14 [PTR2000] MM3 Irs 1 IR 17 20 22.41 -35 55 15.8           ~ 1 0
15 [PTR2000] MM3 Irs 3 IR 17 20 22.87 -35 55 07.1           ~ 1 0
16 [PTR2000] MM3 Irs 2 IR 17 20 22.89 -35 55 22.3           ~ 2 0
17 [PTR2000] MM3 Irs 5 IR 17 20 23.18 -35 54 59.8           ~ 1 0
18 [PTR2000] MM3 Irs 4 IR 17 20 23.21 -35 54 52.9           ~ 1 0
19 [PTR2000] MM3 Irs 6 IR 17 20 23.37 -35 54 58.4           ~ 1 0
20 [PTR2000] MM3 Irs 7 IR 17 20 23.42 -35 55 03.0           ~ 1 0
21 [PTR2000] MM3 Irs 8 IR 17 20 23.57 -35 54 56.0           ~ 1 0
22 JCMTSF J172024.1-355456 Rad 17 20 24.1 -35 54 59           ~ 7 0
23 NGC 6334 HII 17 20 51 -36 06.9           ~ 576 0
24 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 262 0
25 [PTR2000] 1-1 IR ~ ~           ~ 1 0
26 [PTR2000] 1-4 IR ~ ~           ~ 1 0
27 [PTR2000] 1-3 IR ~ ~           ~ 1 0
28 [PTR2000] 1-2 IR ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.02.20-03:56:58

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