2009A&A...493..571P


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.04CET20:41:02

2009A&A...493..571P - Astronomy and Astrophysics, volume 493, 571-577 (2009/1-2)

The new star forming site NGC 6334 IV (MM3).

PERSI P., TAPIA M., ROTH M. and GOMEZ M.

Abstract (from CDS):

The eastern part of the massive star forming region NGC 6334 IV is characterized by the presence of the millimeter continuum sources MM3, MM4, and the optically thin HII region G351.24+0.65. Here we study the star formation in this part of the cloud. We imaged this region, here named NGC 6334 IV (MM3), at sub-arcsec resolution in Ks, H2, Br γ, and in the mid-infrared, from 8.9 to 12.7µm. In addition, we used IRAC/Spitzer and ISOCAM images. From the analysis of the IRAC color-color and H-Ks versus Ks-[3.6] diagrams, we found 18 embedded very young stellar objects within an area of 75''x75 ''. One of these sources, IR-MM3 (IRS 8E), shows a very steep energy distribution with an infrared spectral index of αIR=3.5 and Lbol=985L. This protostar, which coincides with an OH maser source and with the continuum millimeter source MM3, is the exciting source of two hydrogen molecular knots found in our H2 image. Two sources (IRS 18, and 19) with infrared excess and a steep SED are probably associated with the HII region G351.24+0.65. The IRAC and ISOCAM images indicate the presence of extended PAH emission in the region. We have discovered a new center of massive star formation in the giant molecular cloud complex NGC 6334.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: HII regions - ISM: jets and outflows - ISM: clouds - infrared: stars - infrared: general

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * bet Leo dS* 11 49 03.57834 +14 34 19.4090 2.30 2.22 2.13 2.08 2.06 A3Va 548 0
2 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2165 0
3 * alf Sco ** 16 29 24.45970 -26 25 55.2094 4.08 2.75 0.91 -0.64 -1.87 M0.5Iab+B3V: 709 0
4 NAME NGC 6334-IV Cl* 17 20 17 -35 54.9           ~ 41 1
5 [HTK2008] IRN IV-2 Y*O 17 20 17.8 -35 54 53           ~ 13 0
6 [HG83] IRS-IV-2 Y*O 17 20 19.3 -35 54 05           ~ 10 0
7 NGC 6334A HII 17 20 19.3 -35 54 55           ~ 113 0
8 [PTR2000] c7 Rad 17 20 19.5 -35 54 42           ~ 3 0
9 [HHS87] IRS 9 IR 17 20 20.2 -35 55 06           ~ 2 0
10 [HHS87] IRS 12 IR 17 20 20.6 -35 55 40           ~ 2 0
11 [HHS87] IRS 11 IR 17 20 20.8 -35 55 19           ~ 2 0
12 [HHS87] IRS 13 IR 17 20 21.1 -35 55 37           ~ 2 0
13 [HHS87] IRS 49 IR 17 20 21.1 -35 54 39           ~ 2 0
14 [HG83] IRS-IV-6 IR 17 20 21.6 -35 55 14           ~ 4 0
15 [HHS87] IRS 16 IR 17 20 22.0 -35 54 59           ~ 2 0
16 JCMTSF J172022.1-355538 Rad 17 20 22.2 -35 55 44           ~ 4 0
17 [PTR2000] MM3 Irs 2 IR 17 20 22.89 -35 55 22.3           ~ 2 0
18 [HTK2008] IRN IV-6 Rad 17 20 23.1 -35 55 27           ~ 6 0
19 [HTK2008] IRN IV-3 RNe 17 20 23.82 -35 54 56.3           ~ 3 0
20 JCMTSF J172024.1-355456 Rad 17 20 24.1 -35 54 59           ~ 7 0
21 NGC 6334 HII 17 20 51 -36 06.9           ~ 603 0
22 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 365 1

    Equat.    Gal    SGal    Ecl

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