2004A&A...415..627T

Query : 2004A&A...415..627T

2004A&A...415..627T - Astronomy and Astrophysics, volume 415, 627-642 (2004/2-4)

A Compact Array imaging survey of southern bright-rimmed clouds.

THOMPSON M.A., URQUHART J.S. and WHITE G.J.

Abstract (from CDS):

We have carried out a radio-wavelength imaging survey of 45 bright-rimmed clouds (BRCs), using the Australia Telescope Compact Array to characterise the physical properties in their ionised boundary layers. We detected radio emission from a total of 25 clouds and using a combination of Digitised Sky Survey and mid-infrared MSX 8µm images classified the emission into that associated with the ionised cloud rims, that associated with embedded possible massive YSOs and that unlikely to be associated with the clouds at all. A total of 18 clouds display radio emission clearly associated with the cloud rim and we determine the ionising photon flux illuminating these clouds and the electron density and pressure of their ionised boundary layers. Using a global estimate for the interior molecular pressure of these clouds we show that the majority are likely to be in pressure equilibrium and hence are currently being shocked by photoionisation-induced shocks. We identify those clouds where the predicted ionising photon flux is inconsistent with that derived from the observations and show that either the spectral types of the stars illuminating the BRCs are earlier than previously thought or that there must be additional ionising sources within the HII regions. Finally, we identify the radio sources embedded within the clouds with infrared stellar clusters and show that they contain late O and early B-type stars, demonstrating that a number of BRCs are intimately involved with high to intermediate-mass star formation.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - ISM: HII regions - ISM: clouds - radio continuum: ISM

Nomenclature: Table 3, 4: [TUW2004] SFO NN, [TUW2004] SFO NNa N=18+18.

CDS comments: Table 6 : MFJ 3 = MFJ SH 2-306 3.

Simbad objects: 123

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Number of rows : 123
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 BRAN 16 HII 07 19 07.4 -21 56 17           ~ 14 1
2 HD 57236 SB* 07 19 30.1024120872 -22 00 17.279067852 8.21 8.90 8.80 9.41   O8.5V 61 1
3 TYC 5987-2050-1 * 07 30 01.2701952120 -19 08 34.867551696 11.5 11.97 11.34 11.15   O6.5V((f))z 17 1
4 TYC 5987-2554-1 * 07 30 35.2789174344 -19 06 22.164331104 11.22 11.78 11.16 11.01   O9 19 1
5 ALS 18686 * 07 30 59.4 -18 55 57 13.6 13.92 13.30     B0V 3 0
6 LBN 1050 HII 07 31 02.4 -19 09 17           ~ 23 1
7 MSX6C G234.7617-00.2766 Cld 07 31 48.9 -19 27 33           ~ 6 1
8 [TUW2004] SFO 47b Rad 07 31 49.0 -19 24 38           ~ 1 0
9 [TUW2004] SFO 47a Rad 07 32 10.0 -19 28 48           ~ 1 0
10 SH 2-307 HII 07 35 33 -18 45.6           ~ 60 2
11 [TUW2004] SFO 49b Rad 07 35 34.5 -18 45 32           ~ 2 0
12 MSX6C G234.6358+00.8281 HII 07 35 40.9 -18 48 59           ~ 10 1
13 PMN J0736-1852 Rad 07 36 02.37762805 -18 53 09.9251929           ~ 8 1
14 NAME GUM Nebula ISM 07 43 -42.1           ~ 421 1
15 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1154 1
16 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 904 0
17 CD-40 4427 Y*? 08 35 31.4358526440 -40 40 19.154664732 10.07 10.43 9.90 10.03 9.54 B1V 34 1
18 NGC 2626 RNe 08 35 32 -40 40.3           ~ 31 2
19 BRAN 166 HII 08 38 08.0 -40 17 53           ~ 29 1
20 HD 73882 EB* 08 39 09.53412 -40 25 09.2608 7.07 7.59 7.19 6.67 6.30 O8.5IV 245 2
21 [TUW2004] SFO 56 Rad 08 42 57.0 -40 00 26           ~ 1 0
22 SFO 56 Cld 08 42 59.5 -39 59 56           ~ 6 1
23 GUM 15 HII 08 43 52.5 -41 14 39           ~ 32 2
24 SFO 57 Cld 08 44 07.7 -41 16 14           ~ 7 1
25 [TUW2004] SFO 57 Rad 08 44 11.4 -41 16 17           ~ 1 0
26 HD 74804 Y*? 08 44 40.3247349456 -41 16 37.974116352 7.13 9.26 8.84 8.31 9.41 B3/5II 63 1
27 [TUW2004] SFO 58a Rad 08 45 15.8 -41 13 33           ~ 1 0
28 [TUW2004] SFO 58b Rad 08 45 19.5 -41 15 13           ~ 1 0
29 SFO 58 Cld 08 45 25.4 -41 16 02           ~ 9 1
30 IRAS 08563-4711 HII 08 58 04.2 -47 22 57           ~ 25 2
31 VdBH 26 RNe 08 58 04.3 -47 22 46 15.52 15.41 14.20     ~ 22 1
32 VdBH 26 A * 08 58 04.4468706504 -47 22 52.374458460   15.50 14.18 13.99 12.20 B5V 4 0
33 NAME vdBH RN 26 IR Cluster Cl* 08 58 05.0 -47 22 40           ~ 4 0
34 CD-46 4800 * 08 58 06.2644039152 -47 23 12.152688180   11.16 10.73 10.70 10.16 F3IV 6 0
35 [TUW2004] SFO 59 Rad 08 58 09.1 -47 21 51           ~ 1 1
36 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 305 2
37 [FP74] RCW 38 IRS 2 Y*O 08 59 05.6555109888 -47 30 40.941723780       14.05 11.20 O5.5V 27 1
38 [TUW2004] SFO 61b Rad 11 00 08.0 -59 37 48           ~ 1 0
39 [TUW2004] SFO 61a Rad 11 00 08.0 -59 36 06           ~ 1 0
40 SFO 61 Cld 11 00 13.5 -59 36 09           ~ 6 1
41 SFO 62 Cld 11 01 15.8 -59 51 01           ~ 8 0
42 IRAS 10591-5934 IR 11 01 15.8 -59 51 01           ~ 12 1
43 NGC 3503 RNe 11 01 15.9 -59 50 39           ~ 19 1
44 [TUW2004] SFO 62 Rad 11 01 16.6 -59 50 40           ~ 1 1
45 SFO 63 Cld 11 03 18.8 -59 48 01           ~ 6 0
46 [TUW2004] SFO 63 Rad 11 03 24.8 -59 48 55           ~ 1 0
47 HD 305938 SB* 11 04 25.6698498648 -59 45 32.900560380 8.83 9.53 9.40 9.81   B1:V 20 1
48 BRAN 347 HII 11 11 59.8 -58 47 47           ~ 13 1
49 HD 97471 * 11 12 07.0078983600 -58 48 14.471461476 8.42 9.55 9.30 9.77   OB- 59 2
50 [TUW2004] SFO 64 Rad 11 12 13.7 -58 46 45           ~ 1 0
51 IRAS 11101-5829 Y*O 11 12 18.19248 -58 46 20.8452           ~ 31 0
52 [TUW2004] SFO 66d Rad 11 33 07.3 -63 13 14           ~ 1 0
53 [TUW2004] SFO 66c Rad 11 33 15.6 -63 17 26           ~ 1 0
54 [TUW2004] SFO 66b Rad 11 33 36.1 -63 16 32           ~ 1 0
55 SFO 66 Cld 11 33 49.5 -63 16 20           ~ 6 0
56 [TUW2004] SFO 66a Rad 11 33 51.2 -63 15 56           ~ 1 0
57 SFO 67 Cld 11 34 00.7 -63 11 19           ~ 5 0
58 [TUW2004] SFO 67a Rad 11 34 04.1 -63 12 11           ~ 1 0
59 [TUW2004] SFO 67b Rad 11 34 07.3 -63 18 56           ~ 1 0
60 SFO 68 Cld 11 35 31.9 -63 14 51           ~ 7 0
61 [TUW2004] SFO 68 Rad 11 35 32.4 -63 15 33           ~ 1 0
62 V* V1051 Cen EB* 11 37 48.4343499072 -63 19 23.518561512 6.28 7.18 7.16 8.11   O5.5V((f))+O8:V 147 1
63 IC 2944 OpC 11 38 20.00 -63 22 22.0           ~ 184 0
64 HD 101205 EB* 11 38 20.36114 -63 22 21.8889 5.64 6.53 6.54 7.41   O6V 160 0
65 HD 101436 * 11 39 49.9553334624 -63 28 43.549419180 6.8 8.98 8.93 8.78   O6.5V((f)) 137 1
66 [TUW2004] SFO 69 Rad 11 41 04.9 -63 22 05           ~ 1 0
67 MSX6C G295.1622-01.5825 Cld 11 41 11.2 -63 23 13           ~ 5 0
68 [TUW2004] SFO 70 Rad 11 42 04.1 -63 08 11           ~ 1 0
69 SFO 70 Cld 11 42 11.2 -63 07 50           ~ 5 0
70 NAME Cen R1 As* 13 08 -63.0           ~ 11 1
71 BRAN 400B RNe 13 08 45.4 -62 17 30           ~ 10 0
72 V* V961 Cen SB* 13 16 04.8010592232 -62 35 01.490795556 7.51 9.16 9.32 8.82   O9.5III+B0Ib 103 1
73 HD 115455 SB* 13 18 35.3592390638 -62 29 28.407889555 7.40 8.17 7.97 8.81   O8III((f)) 103 1
74 CPD-61 3587 * 13 19 03.9700032233 -62 34 10.159085928 10.48 11.02 10.73 10.80   B2V 40 1
75 Cl Stock 16 OpC 13 19 26.4 -62 37 19           ~ 91 0
76 GUM 48a HII 13 19 46 -62 30.7           ~ 29 1
77 HD 124314 ** 14 15 01.60615 -61 42 24.3831   8.96 6.64 6.45 6.31 O6V(n)((f)) 148 0
78 [TUW2004] SFO 74 Rad 14 19 40.9 -61 25 17           ~ 2 1
79 IRAS 14159-6111 HII 14 19 42.1 -61 25 17           ~ 10 1
80 MSX6C G313.2850-00.3350 Cld 14 19 42.1 -61 25 17           ~ 12 1
81 RCW 85 HII 14 20.7 -61 24           ~ 15 1
82 RCW 98 HII 15 55.4 -54 39           ~ 15 1
83 CD-54 6456 ** 15 55 39.60148 -54 38 36.6363 10.51 10.95 10.41 10.37 8.94 O9.5V 42 2
84 [TUW2004] SFO 75 Rad 15 55 43.4 -54 39 07           ~ 1 0
85 MSX6C G327.5761-00.8497 Cld 15 55 50.4 -54 38 58           ~ 14 1
86 GUM 51 HII 16 10.0 -49 08           ~ 21 1
87 HD 144918 ** 16 10 29.1581960322 -49 02 47.091807995 10.4 10.735 9.961 9.956   O5/7 38 0
88 [TUW2004] SFO 76 Rad 16 10 37.6 -49 05 46           ~ 1 0
89 SFO 76 Cld 16 10 38.6 -49 05 52           ~ 10 1
90 SFO 77 Cld 16 19 53.9 -25 33 39           ~ 7 0
91 [TUW2004] SFO 77 Rad 16 19 56.5 -25 33 51           ~ 1 0
92 [TUW2004] SFO 78 Rad 16 20 44.9 -25 04 40           ~ 1 0
93 SFO 78 Cld 16 20 52.9 -25 08 07           ~ 7 0
94 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 870 0
95 GUM 53 HII 16 40 00.1 -48 51 45           ~ 95 1
96 IRAS 16362-4845 MoC 16 40 00.1 -48 51 45           ~ 18 2
97 NAME RCW 108 IR Cluster Cl* 16 40 01 -48 52.0           ~ 13 0
98 HD 150135 * 16 41 19.4443334664 -48 45 47.568769200 6.19 7.00 6.88 7.33   O6.5V((f))z 124 0
99 HD 150136 SB* 16 41 20.4155898816 -48 45 46.730465028 4.98 5.78 5.65 6.93   O3.5-4III(f*)+O6IV 190 0
100 MSX6C G343.0500+02.6094 Cld 16 46 50.2 -41 13 54           ~ 8 0
101 [TUW2004] SFO 82b Rad 16 47 19.4 -41 15 43           ~ 1 0
102 [TUW2004] SFO 82a Rad 16 47 22.1 -41 13 06           ~ 1 0
103 SFO 83 Cld 16 52 12.0 -40 48 09           ~ 5 0
104 [TUW2004] SFO 83 Rad 16 52 13.5 -40 48 30           ~ 1 0
105 GUM 55 HII 16 53 -42.2           ~ 26 0
106 SFO 84 Cld 16 53 45.1 -40 07 22           ~ 5 0
107 HD 326286 * 16 53 49.2828601848 -41 03 49.201649640   10.58 10.44     B0 12 0
108 [TUW2004] SFO 84 Rad 16 53 51.9 -40 08 09           ~ 1 0
109 HD 152245 * 16 54 00.4797621624 -40 31 58.152058500 7.71 8.49 8.37     B0Ib 59 0
110 HD 152233 SB* 16 54 03.5909222280 -41 47 29.841281484 5.93 6.72 6.59     O6II(f) 194 0
111 [TUW2004] SFO 85a Rad 16 59 04.0 -42 41 46           ~ 2 1
112 MSX6C G343.3516-00.0786 RNe 16 59 06.4 -42 42 04   13       ~ 13 0
113 CD-42 11721 Be* 16 59 06.7629322176 -42 42 08.404228224 12.16 12.28 11.00     B0IVe 168 0
114 [TUW2004] SFO 85b Rad 16 59 12.0 -42 43 15           ~ 1 0
115 GAL 345.2+01.0 HII 16 59 40 -40 11.4           ~ 25 0
116 HD 161853 ** 17 49 16.5582018192 -31 15 18.068754204 7.48 8.11 7.97 8.81   O8V(n)z+B 73 2
117 LMH 8 HII 17 49.3 -31 15           ~ 15 1
118 M 8 OpC 18 03 37 -24 23.2           ~ 613 1
119 * 9 Sgr Em* 18 03 52.4450051016 -24 21 38.632254012 5.08 5.97 5.97 5.72 5.70 O4V((f))z 543 0
120 * 11 Sgr Or* 18 09 17.6999100192 -23 59 18.231196056 6.65 7.45 7.31 8.36   O7V(n)z+B0:V: 139 2
121 [TUW2004] SFO 89 Rad 18 09 48.9 -24 04 56           ~ 1 0
122 SFO 89 Cld 18 09 54.3 -24 04 56           ~ 10 1
123 LBN 29 HII 18 10.6 -23 59           ~ 21 1

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