2004A&A...427..839C


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET02:35:25

2004A&A...427..839C - Astronomy and Astrophysics, volume 427, 839-847 (2004/12-1)

Triggered massive star formation in the vicinity of WR 48a.

CLARK J.S. and PORTER J.M.

Abstract (from CDS):

We utilise Midcourse Space Experiment mid-IR imaging and published data to discuss the (massive) star formation region at galactic longitude ∼305°, apparently associated with the Wolf Rayet WR 48a and the attendant clusters Danks 1 and 2. A spectacular three lobed wind blown bubble surrounds the aforementioned sources, for which we may infer a minimum age of ∼3Myr from the presence of the WCL star. Near IR data reveals the presence of numerous embedded sources on the periphery of the wind blown bubble. The presence of coincindent H2O, OH and methanol maser emission is suggestive of ongoing massive star formation, which is suppported by the fluxes of the associated IR sources, and the requisite LyC flux required to support the emission from the subset that have associated UCHII regions. Consideration of the integrated radio flux of the complex implies that a minimum of 31 O7V stars must be present, under the assumption of no photon leakage. Given the age and morphology of the complex and in particular the observation that the central exciting clusters have entirely cleared their natal material, we expect this assumption will be violated, and hence that the true population of massive stars is likely to be significantly larger. If confirmed, the G305 complex represents one of the most massive regions of ongoing triggered star formation currently identified in the galaxy.

Abstract Copyright:

Journal keyword(s): stars: Wolf-Rayet - stars: individual: WR 48a - stars: formation - ISM: H II regions

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 - 2021
#notes
1 IC 1805 OpC 02 32 42 +61 27.0   7.03 6.5     ~ 482 2
2 NGC 2244 OpC 06 31 55 +04 56.5           ~ 571 1
3 NAME Rosette Nebula HII 06 32 26.76 +04 47 37.1           ~ 456 1
4 PMN J1308-6215 HII 13 08 32.5 -62 15 28           ~ 3 0
5 [HLB98] SEST 58 Mas 13 08 34.7 -62 15 07           ~ 2 0
6 IRAS 13054-6159 HII 13 08 34.8 -62 15 07           ~ 7 0
7 [DBS2003] 82 Cl* 13 08 36 -62 15.0           ~ 3 0
8 [HLB98] SEST 59 Mas 13 10 15.3 -62 43 53           ~ 2 0
9 IRAS 13070-6227 HII 13 10 15.3 -62 43 53           ~ 5 0
10 GAL 305.10+00.14 HII 13 10 17.5 -62 38 34           ~ 10 0
11 GRS G305.40 +00.20 HII 13 10 19 -62 38.5           ~ 33 0
12 OH 305.20 +0.21 Mas 13 11 10.4904 -62 34 38.856           ~ 43 0
13 GAL 305.20+00.21 HII 13 11 11.7 -62 34 44           ~ 27 0
14 OH 305.21 +0.21 Mas 13 11 13.7017 -62 34 41.397           ~ 24 1
15 [DBS2003] 83 Cl* 13 11 14.0 -62 45 04           ~ 7 0
16 MMB G305.200+00.019 Mas 13 11 16.8912 -62 45 55.008           ~ 16 0
17 [DBS2003] 84 Cl* 13 11 17.0 -62 45 46           ~ 5 0
18 Caswell H2O 305.20+00.01 Mas 13 11 17.1 -62 46 30           ~ 5 0
19 GAL 305.20+00.02 HII 13 11 17.7 -62 45 46           ~ 9 0
20 IRAS 13080-6229 HII 13 11 17.9 -62 45 55           ~ 19 0
21 GAL 305.17-00.37 HII 13 11 18.4 -63 09 13           ~ 6 0
22 [DWS84] IRS 7 * 13 11 18.7 -62 34 31           M4 2 0
23 Caswell CH3OH 305.21+00.02 Mas 13 11 19.4 -62 46 00           ~ 2 0
24 Caswell OH 305.21+00.02 Mas 13 11 20.2 -62 45 26           ~ 7 0
25 Caswell CH3OH 305.25+00.25 Mas 13 11 32.47 -62 32 09.1           ~ 13 0
26 GAL 305.20+00.2 HII 13 11 35.1 -62 33 26           ~ 35 0
27 GAL 305.25+00.20 HII 13 11 37.5 -62 34 37           ~ 6 0
28 [DBS2003] 131 OpC 13 11 39.400 -62 33 11.55           ~ 15 0
29 [DWS84] G305.27-0.01 HII 13 11 52.0 -62 47 10           ~ 8 0
30 [DBS2003] 130 Cl* 13 11 54 -62 47.0           ~ 8 0
31 [CPA2006] S154 HII 13 12 17.1 -62 42 15           ~ 9 0
32 [DBS2003] 132 Cl* 13 12 18 -62 42.3           ~ 8 0
33 Cl Danks 1 OpC 13 12 27 -62 42.1           ~ 62 0
34 [HLB98] SEST 61 Mas 13 12 29.0 -62 34 31           ~ 2 0
35 Caswell H2O 305.36+00.20 Mas 13 12 29 -62 34.5           ~ 3 0
36 GRS G305.36 +00.18 HII 13 12 29.2 -62 34 29           ~ 21 0
37 GAL 305.36+00.18 HII 13 12 35.2 -62 35 35           ~ 7 0
38 MMB G305.362+00.150 Mas 13 12 35.86 -62 37 17.9           ~ 12 0
39 Caswell OH 305.362+00.150 Mas 13 12 35.87 -62 37 17.8           ~ 2 0
40 Caswell H2O 305.37+00.21 Mas 13 12 36.6 -62 33 40           ~ 4 0
41 [DWS84] IRS 42 * 13 12 36.8 -62 33 52   14.976 13.025     M1 2 0
42 Caswell CH3OH 305.37+00.19 Mas 13 12 39.1 -62 35 10           ~ 5 0
43 WR 48a WR* 13 12 39.65 -62 42 55.8           WC6 81 0
44 MSX6C G305.3614+00.0561 IR 13 12 39.7 -62 42 56           ~ 1 0
45 Cl Danks 2 OpC 13 12 55 -62 40.9           ~ 57 0
46 NAME G305 Complex SFR 13 13 -62.7           ~ 54 0
47 IRAS 13097-6228 * 13 13 02.0441311880 -62 45 03.321081567           WCL 3 0
48 IRAS 13107-6208 HII 13 13 57.0 -62 24 35           ~ 9 0
49 GAL 305.54+00.34 HII 13 13 57.8 -62 25 12           ~ 8 0
50 [DBS2003] 133 OpC 13 13 58 -62 24.4           ~ 6 0
51 GAL 305.55-00.01 HII 13 14 21.5 -62 45 37           ~ 6 0
52 [DBS2003] 134 Cl* 13 14 22 -62 44.7           ~ 4 0
53 GAL 305.79+00.14 HII 13 16 17.2 -62 35 39           ~ 6 0
54 GAL 305.81-00.06 HII 13 16 37.8 -62 47 38           ~ 5 0
55 Caswell H2O 305.80-00.24 Mas 13 16 42.4 -62 58 32           ~ 5 0
56 IRAS 13134-6242 mul 13 16 42.9 -62 58 45           ~ 29 0
57 Caswell CH3OH 305.80-00.24 Mas 13 16 46.1 -62 58 33           ~ 2 0
58 [WBH98] 13134-6242 HII 13 16 46.3 -62 58 35           ~ 23 0
59 HD 119078 WR* 13 43 16.3585170935 -67 24 04.971391283 9.11 9.737 9.40 10.08   WC7/8 99 0
60 HD 121194 WR* 13 55 48.4480921364 -61 09 48.458279758 14.34 13.65 12.20 12.12 10.31 WC8 38 0
61 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 485 0
62 W 49 SFR 19 10 20 +09 07.7           ~ 521 1
63 IC 1396 OpC 21 39 00 +57 29.4           ~ 449 1

    Equat.    Gal    SGal    Ecl

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2021.03.08-02:35:25

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