2003A&A...401...99I


Query : 2003A&A...401...99I

2003A&A...401...99I - Astronomy and Astrophysics, volume 401, 99-111 (2003/4-1)

Results of the ESO-SEST Key Programme on CO in the Magellanic Clouds. IX. The giant LMC HII region complex N 11.

ISRAEL F.P., DE GRAAUW T., JOHANSSON L.E.B., BOOTH R.S., BOULANGER F., GARAY G., KUTNER M.L., LEQUEUX J., NYMAN L.-A. and RUBIO M.

Abstract (from CDS):

The second-brightest star formation complex in the Large Magellanic Cloud, N 11, was surveyed extensively in the J=1-0 transition of 12CO. In this paper we present maps and a catalogue containing the parameters of 29 individual molecular clouds in the complex, although more may be present. The distribution of molecular gas in the N 11 complex is highly structured. In the southwestern part of N 11, molecular clouds occur in a ring or shell surrounding the major OB star association LH 9. In the northeastern part, a chain of molecular clouds delineates the rim of one of the so-called supergiant shells in the LMC. There appears to be very little diffuse molecular gas in-between the individual well-defined clouds, especially in the southwestern ring. Most of the clouds have dimensions only slightly larger than those of the survey beam, i.e. diameters of 25 pc or less. A subset of the clouds mapped in J=1-0 12CO transition was also observed in the J=2-1 12CO transition, and in the corresponding transitions of 3co. Clouds mapped in J=2-1 12CO with a two times higher angular resolution show further, clear substructure. The elements of this substructure, however, have dimensions once again comparable to those of the mapping beam. For a few clouds, sufficient information was available to warrant an attempt at modelling their physical parameters. They contain fairly warm (Tkin=60-150K) and moderately dense (nH2 = 3000 cm–3) gas. The northeastern chain of CO clouds, although lacking in diffuse intercloud emission, is characteristic of the more quiescent regions of the LMC, and appears to have been subject to relatively little photo-processing. The clouds forming part of the southwestern shell or ring, however, are almost devoid of diffuse intercloud emission, and also exhibit other characteristics of an extreme photon-dominated region (PDR).

Abstract Copyright:

Journal keyword(s): galaxies: individual: LMC - galaxies: Magellanic Clouds - galaxies: ISM - galaxies: irregular - galaxies: Local Group - star: formation

Nomenclature: Table 1: [IDJ2003] NN (Nos 1-29).

Simbad objects: 63

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Number of rows : 63
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10530 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6555 1
3 V* R Dor AB* 04 36 45.59127 -62 04 37.7974 7.84 6.98 5.40 2.71 -0.44 M8III:e 330 0
4 SNR J045447-662528 SNR 04 54 48.00 -66 25 42.0           ~ 109 0
5 LHA 120-N 11G EmO 04 55 30 -66 23.0           ~ 8 0
6 IRAS 04555-6632 IR 04 55 39.3 -66 27 45           ~ 4 0
7 LI-LMC 192 IR 04 55 40.3 -66 34 22           ~ 2 0
8 LHA 120-N 11I HII 04 55 50 -66 34.4           ~ 19 0
9 LHA 120-N 11H EmO 04 55 55 -66 29.0           ~ 8 0
10 NGC 1760 HII 04 56 20.8 -66 32 13           ~ 30 0
11 IRAS 04562-6641 Y*O 04 56 22.5808096728 -66 36 56.628488700 19.213 19.595 18.667 17.830 17.209 ~ 9 0
12 DEM L 34 HII 04 56 34.3 -66 26 52           ~ 101 0
13 NGC 1761 As* 04 56 39 -66 29.0     9.94     ~ 98 0
14 IC 2115 HII 04 56 50 -66 24.9           ~ 7 2
15 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 248 0
16 NGC 1763 As* 04 56 51.5 -66 24 25     9.40     ~ 161 3
17 PMN J0456-6624 HII 04 56 51.7 -66 24 37           ~ 12 0
18 IRAS 04571-6627 mul 04 57 15.5 -66 23 14           ~ 52 1
19 HD 32340 Em* 04 57 16.253 -66 23 20.94   13.11 12.45 14.00   O3-O6V 77 0
20 LHA 120-N 11J EmO 04 57.5 -66 18           ~ 4 0
21 NGC 1769 As* 04 57 44.5 -66 27 42           ~ 70 2
22 LHA 120-N 11D EmO 04 57.8 -66 28           ~ 18 0
23 NGC 1773 HII 04 58 12.0 -66 21 36           ~ 51 1
24 PMN J0458-6611 Rad 04 58 36 -66 11.9           ~ 6 0
25 LI-LMC 266 IR 04 58 46.7 -66 09 52           ~ 3 0
26 IRAS 04587-6611 Y*O 04 58 54.334 -66 07 18.77           ~ 11 0
27 NAME LMC 1 Supergiant Shell sh 04 59 41 -65 44.7           ~ 36 0
28 NGC 1787 As* 05 01 45.260 -65 49 27.82   11.09 10.92     ~ 26 0
29 LHA 120-N 44 EmO 05 22 06.9 -67 56 46           ~ 188 1
30 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16507 1
31 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1131 2
32 [IDJ2003] 1 Cld ~ ~           ~ 1 0
33 [IDJ2003] 29 Cld ~ ~           ~ 1 0
34 [IDJ2003] 2 Cld ~ ~           ~ 1 0
35 LI-LMC 195 IR ~ ~           ~ 2 0
36 LI-LMC 248 IR ~ ~           ~ 2 0
37 LI-LMC 268 IR ~ ~           ~ 2 0
38 [IDJ2003] 3 Cld ~ ~           ~ 1 0
39 [IDJ2003] 4 Cld ~ ~           ~ 1 0
40 [IDJ2003] 5 Cld ~ ~           ~ 1 0
41 [IDJ2003] 6 Cld ~ ~           ~ 1 0
42 [IDJ2003] 7 Cld ~ ~           ~ 1 0
43 [IDJ2003] 8 Cld ~ ~           ~ 1 0
44 [IDJ2003] 9 Cld ~ ~           ~ 1 0
45 [IDJ2003] 10 Cld ~ ~           ~ 1 0
46 [IDJ2003] 11 Cld ~ ~           ~ 1 0
47 [IDJ2003] 12 Cld ~ ~           ~ 1 0
48 [IDJ2003] 13 Cld ~ ~           ~ 1 0
49 [IDJ2003] 14 Cld ~ ~           ~ 1 0
50 [IDJ2003] 15 Cld ~ ~           ~ 1 0
51 [IDJ2003] 16 Cld ~ ~           ~ 1 0
52 [IDJ2003] 17 Cld ~ ~           ~ 1 0
53 [IDJ2003] 18 Cld ~ ~           ~ 1 0
54 [IDJ2003] 19 Cld ~ ~           ~ 1 0
55 [IDJ2003] 20 Cld ~ ~           ~ 1 0
56 [IDJ2003] 21 Cld ~ ~           ~ 1 0
57 [IDJ2003] 22 Cld ~ ~           ~ 1 0
58 [IDJ2003] 23 Cld ~ ~           ~ 1 0
59 [IDJ2003] 24 Cld ~ ~           ~ 1 0
60 [IDJ2003] 25 Cld ~ ~           ~ 1 0
61 [IDJ2003] 26 Cld ~ ~           ~ 1 0
62 [IDJ2003] 27 Cld ~ ~           ~ 1 0
63 [IDJ2003] 28 Cld ~ ~           ~ 1 0

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2023.01.29-15:59:57

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