2015A&A...582A..66H

Query : 2015A&A...582A..66H

2015A&A...582A..66H - Astronomy and Astrophysics, volume 582A66-66 (2015/10-1)

Massive envelopes and filaments in the NGC 3603 star forming region.

HUMMEL C.A., STANKE T., GALVAN-MADRID R. and KORIBALSKI B.S.

Abstract (from CDS):

The formation of massive stars and their arrival on the zero-age main-sequence occurs hidden behind dense clouds of gas and dust. In the giant HII region NGC 3603, the radiation of a young cluster of OB stars has dispersed dust and gas in its vicinity. At a projected distance of 2.5pc from the cluster, a bright mid-infrared (MIR) source (IRS 9A) was identified as a massive young stellar object (MYSO), located on the side of a molecular clump (MM2) of gas facing the cluster. We investigated the physical conditions in MM2, based on APEX sub-mm observations using the SABOCA and SHFI instruments, and archival ATCA 3mm continuum and CS spectral line data. We resolved MM2 into several compact cores, one of them closely associated with IRS 9A. These are likely to be infrared dark clouds because they do not show the typical hot-core emission lines and are mostly opaque against the MIR background. The compact cores have masses of up to several hundred times the solar mass and gas temperatures of about 50 K, without evidence of internal ionizing sources. We speculate that IRS 9A is younger than the cluster stars, but is in an evolutionary state after the compact cores.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - stars: early-type - stars: formation - stars: pre-main sequence - stars: individual: NGC 3603

VizieR on-line data: <Available at CDS (J/A+A/582/A66): list.dat IRS9A_10.fits>

Nomenclature: Table 2, Fig. 4: [HSG2015] Sa N=5 among (Nos Sa-Sg), [HSG2015] SN (Nos S8-S9).

CDS comments: Calibrator PKS 1045-62 not identified. B13134 is IRAS 13134-6242.

Simbad objects: 44

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Number of rows : 44
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 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
2 V* VY CMa s*r 07 22 58.3261352189 -25 46 03.194390594 12.01 10.068 8.691 7.938   M5Iae 1169 0
3 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
4 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
5 [NS2003] 21 IR 11 15 01.44 -61 15 55.3           ~ 2 0
6 [HSG2015] S8 cor 11 15 02.88 -61 15 51.5           ~ 1 0
7 [NS2003] 31 IR 11 15 02.98 -61 16 29.2           ~ 2 0
8 [NS2003] 23 IR 11 15 02.98 -61 15 56.7           ~ 2 0
9 [NS2003] 20 IR 11 15 03.02 -61 15 44.5           ~ 2 0
10 [NS2003] 33 IR 11 15 03.46 -61 16 41.0           ~ 2 0
11 [NS2003] 41 IR 11 15 03.58 -61 17 14.2           ~ 2 0
12 [NS2003] 7 IR 11 15 04.03 -61 15 46.6           ~ 3 0
13 [NS2003] 38 IR 11 15 04.51 -61 17 00.6           ~ 2 0
14 [NS2003] 40 IR 11 15 05.40 -61 17 07.8           ~ 2 0
15 [NS2003] 22 IR 11 15 05.60 -61 15 56.1           ~ 2 0
16 [NS2003] 32A IR 11 15 05.68 -61 16 38.8           ~ 2 0
17 [NS2003] 8 IR 11 15 05.90 -61 15 46.6           ~ 3 0
18 [NS2003] 32B IR 11 15 06.65 -61 16 39.4           ~ 2 0
19 2MASS J11150682-6117011 * 11 15 06.8225389368 -61 17 01.134152664           ~ 2 0
20 [NS2003] 35A IR 11 15 07.51 -61 16 56.2           ~ 2 0
21 [NS2003] 26A IR 11 15 07.67 -61 16 02.4           ~ 2 0
22 [NBY2002] MM 2E MoC 11 15 08.2 -61 16 55           ~ 3 0
23 [HSG2015] Sc cor 11 15 08.41 -61 16 57.2           ~ 1 0
24 [NS2003] 6P IR 11 15 08.70 -61 15 51.5           ~ 2 0
25 [NS2003] 6L IR 11 15 08.86 -61 15 42.6           ~ 2 0
26 [NS2003] 39B IR 11 15 09.61 -61 17 05.8           ~ 2 0
27 [NS2003] 27 IR 11 15 09.77 -61 16 02.5           ~ 2 0
28 [NS2003] 39A IR 11 15 09.93 -61 17 02.6           ~ 2 0
29 [HSG2015] Sg cor 11 15 10.33 -61 16 16.4           ~ 1 0
30 [NS2003] 25 IR 11 15 11.02 -61 16 02.2           ~ 2 0
31 [HSG2015] Sf cor 11 15 11.25 -61 17 12.0           ~ 1 0
32 Cl* NGC 3603 MTT 122 * 11 15 11.3377299418 -61 16 45.001815771           ~ 21 0
33 [HSG2015] S9 cor 11 15 11.34 -61 16 45.2           ~ 1 0
34 [FPA77] NGC 3603 IRS 9A IR 11 15 11.34 -61 16 45.2           ~ 19 0
35 [NS2003] 37 IR 11 15 11.87 -61 17 00.6           ~ 2 0
36 [HSG2015] Sa cor 11 15 12.07 -61 16 58.8           ~ 1 0
37 [NBY2002] MM 2 MoC 11 15 12.18 -61 16 59.0           ~ 13 0
38 [NS2003] 29 IR 11 15 12.91 -61 16 09.8           ~ 2 0
39 [HSG2015] Se cor 11 15 13.73 -61 17 24.3           ~ 1 0
40 [NS2003] 36 IR 11 15 14.81 -61 17 00.0           ~ 3 0
41 [NS2003] 28 IR 11 15 16.10 -61 16 05.4           ~ 3 0
42 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
43 IRAS 13134-6242 mul 13 16 42.9 -62 58 45           ~ 39 0
44 W 33 SFR 18 14 14.0 -17 55 50           ~ 292 0

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