2004AJ....128.2374S


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.24CET12:56:27

2004AJ....128.2374S - Astron. J., 128, 2374-2387 (2004/November-0)

A near-infrared/millimeter-wave study of six fourth-quadrant high-mass star formation regions.

SOLLINS P.K. and MEGEATH S.T.

Abstract (from CDS):

We present near-infrared and millimeter-wave observations of six high-mass star-forming regions in the fourth quadrant: RCW 108, G333.6, RCW 117, RCW 122, NGC 6334 I, and G351.6. These regions have heliocentric distances of 1.3-3.0 kpc and total luminosities ranging from 0.5 to 3x105 L. Millimeter maps taken in transitions of C18O, HC3N, 12C16O, and SiO with the Swedish-ESO Submillimetre Telescope 15 m telescope detail the structure and kinematics of the clouds. Near-infrared K-band images of the same regions obtained with the MPG/ESO 2.2 m telescope are used to map the stellar surface density. The C18O (1⟶0) line shows extended high column density gas, with column densities ranging from 1022 to 3x1023/cm2; in contrast, the HC3N (15⟶14) emission shows eight sharply peaked dense cores. We examine these cores for recent and ongoing star formation by searching for high-velocity, non-Gaussian wings on the CO (1⟶0) and SiO (2⟶1) lines, peaks in the surface density of stars, and positional coincidences with IRAS point sources, as well as masers and H II regions reported in the literature. All of the cores show evidence of ongoing star formation. NGC 6334 I(N) stands out as a unique case in which an outflow has formed and masers have appeared, but no IRAS source, K-band cluster, or UC H II region has yet appeared; our data support previous claims that this is a rare example of a core in the earliest stages of forming a cluster of high- and low-mass stars.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - ISM: Molecules - radio lines: ISM - Stars: Formation

Simbad objects: 11

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Number of rows : 11

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 IRAS 16183-4958 FIR 16 22 09.0 -50 06 00           ~ 15 0
2 SNR G333.6-00.2 HII 16 22 11 -50 05.6           ~ 139 0
3 GUM 53 HII 16 40 00.1 -48 51 45           ~ 88 1
4 IRAS 17059-4132 HII 17 09 31.3 -41 35 56           ~ 26 0
5 RCW 117 HII 17 09 34.0 -41 36 12           ~ 65 3
6 GAL 348.73-01.06 HII 17 20 05.8 -38 57 33           ~ 15 0
7 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 262 0
8 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 203 1
9 NAME NGC 6334 I(N) smm 17 20 54 -35 45.0           ~ 122 1
10 IRAS 17258-3637 HII 17 29 16.7 -36 40 13           ~ 52 0
11 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11252 0

    Equat.    Gal    SGal    Ecl

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2020.02.24-12:56:27

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