2003MNRAS.343..143C

Query : 2003MNRAS.343..143C

2003MNRAS.343..143C - Mon. Not. R. Astron. Soc., 343, 143-163 (2003/July-3)

MSX mid-infrared imaging of massive star birth environments - I. Ultracompact HII regions.

CROWTHER P.A. and CONTI P.S.

Abstract (from CDS):

We present mid-infrared 21-µm images of a sample of radio-selected ultracompact HII (UCHII) regions, obtained with the Midcourse Space Experiment (MSX). With one possible exception, all are detected at mid-infrared wavelengths, sampling the warm dust emission of the cocoons of the OB star central exciting sources. Many of the UCHII regions have nearby (up to ~ few pc distant) companion dust emission sources, which represent other potential star birth sites. In some objects the companion dominates the IRAS point source catalogue entry for the UCHII region. We compare the mid- and far-infrared dust emission, measuring the embedded hot star luminosity, with published UCHII radio emission, measuring the Lyman continuum (LyC) luminosity. We find a spectral type dependence, as predicted by the standard model of an ultracompact ionized hydrogen region, surrounded by a natal dust shell, with some scatter, which can be understood by consideration of (1) dust absorption of some fraction of the emitted Lyman continuum photons; (2) fainter companion stars within the UCHII region; and (3) the structure of the UCHII regions differing from star to star. Overall, the higher spatial resolution offered by MSX alleviates difficulties often encountered by comparison of IRAS far-infrared fluxes with radio-derived ionizing fluxes for UCHII regions.

Abstract Copyright: 2003 RAS

Journal keyword(s): stars: early-type - stars: formation - HII regions - infrared: ISM

Simbad objects: 81

goto Full paper

goto View the references in ADS

Number of rows : 81
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 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
2 HHL 5 HII 03 07 24.2 +58 30 45           ~ 152 0
3 GAL 192.58-00.04 HII 06 12 53.16 +18 00 23.3           ~ 25 0
4 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
5 IC 2162 HII 06 13 04.1 +17 58 44           ~ 372 2
6 GAL 005.48-00.24 HII 17 59 02.66 -24 20 51.4           ~ 44 1
7 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 380 0
8 GAL 005.97-01.17 HII 18 03 40.51 -24 22 44.4           ~ 33 0
9 IRAS 18006-2422 HII 18 03 45.7 -24 22 41           ~ 23 0
10 RAFGL 5436 HII 18 06 19.027 -21 37 32.32           ~ 108 0
11 GAL 010.46+00.03 HII 18 08 35.5 -19 52 09           ~ 59 0
12 GAL 010.47+00.03 HII 18 08 38.4 -19 51 52           ~ 159 0
13 [WC89] 010.30-0.15B HII 18 08 55.95 -20 05 55.4           ~ 33 0
14 GAL 010.30-00.15 HII 18 08 56.11 -20 05 53.8           ~ 85 0
15 W 31c HII 18 10 29.1 -19 56 05           ~ 357 0
16 IRAS 18097-1825A cor 18 12 39.72 -18 24 20.5           ~ 69 0
17 [WC89] 012.43-0.05 HII 18 12 54.593 -18 11 08.33           ~ 5 0
18 IRAS 18099-1811 IR 18 12 55.1 -18 11 09           ~ 6 0
19 CORNISH G011.9368-00.6158 HII 18 14 01.0 -18 53 23           ~ 88 1
20 NAME HH 80-81 IRS HII 18 19 11.8 -20 47 35           ~ 157 0
21 [KCW94] 010.841-02.592 Rad 18 19 12.098 -20 47 30.90           ~ 6 0
22 GAL 015.04-00.68 HII 18 20 24.81 -16 11 35.0           ~ 20 1
23 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
24 [KCW94] 018.146-00.284 Rad 18 25 01.083 -13 15 39.33           ~ 4 0
25 IRAS 18222-1317 HII 18 25 02.3 -13 15 51           ~ 17 0
26 GAL 019.61-00.23 HII 18 27 38.0 -11 56 42           ~ 162 0
27 AKARI-IRC-V1 J1828105-112857 SFR 18 28 10.37 -11 28 49.8           ~ 113 1
28 RAFGL 5491 mul 18 28 10.7 -11 29 01           ~ 46 0
29 IRAS 18311-0809 HII 18 33 53.5 -08 07 26           ~ 31 0
30 GAL 023.71+00.17 HII 18 33 53.54 -08 07 13.8           ~ 31 0
31 GAL 023.44-00.18 HII 18 34 43.6 -08 32 25           ~ 58 0
32 GAL 023.46-00.20 HII 18 34 44.92 -08 31 07.4           ~ 12 0
33 ISOGAL-P J183802.9-062347 Y*? 18 38 02.80 -06 23 47.0           ~ 32 0
34 IRAS 18353-0628 HII 18 38 04.9 -06 25 28           ~ 22 0
35 GAL 028.20-00.04 HII 18 42 58.08 -04 14 04.6           ~ 61 0
36 [KCW94] 028.200-00.049 Rad 18 42 58.110 -04 13 57.92           ~ 3 0
37 [CKW87] 184135.6-042104 HII 18 44 14.3 -04 17 57           ~ 10 0
38 GRS G028.29 -00.37 HII 18 44 18.6 -04 17 53           ~ 37 0
39 CORNISH G029.9559-00.0168 Y*O 18 46 04.18 -02 39 21.3           ~ 385 0
40 GAL 030.54+00.02 HII 18 46 59.1 -02 07 32           ~ 12 0
41 IRAS 18443-0210 HII 18 47 00.1 -02 07 26           ~ 15 0
42 IRAS 18449-0115 cor 18 47 34.27 -01 12 43.2           ~ 430 1
43 RAFGL 5536 HII 18 50 30.8 -00 01 59           ~ 48 0
44 [KCW94] 032.798+00.190 Rad 18 50 30.997 -00 01 57.15           ~ 3 0
45 RAFGL 5541 Y*O 18 52 50.26 +00 55 29.6           ~ 122 1
46 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 537 0
47 GAL 037.55-00.11 HII 19 00 16.02 +04 03 15.1           ~ 41 0
48 [WC89] 035.20-1.74 HII 19 01 46.4 +01 13 25           ~ 12 0
49 GAL 035.20-01.74 Y*O 19 01 46.49 +01 13 24.7           ~ 78 1
50 CORNISH G037.8731-00.3996 HII 19 01 53.58 +04 12 51.7           ~ 42 1
51 W 49a SFR 19 10 15.7 +09 06 05           ~ 325 2
52 IRAS 19110+1045 Y*O 19 13 22.0427 +10 50 53.336           ~ 132 0
53 Caswell OH 045.12+00.13 HII 19 13 27.85 +10 53 36.7           ~ 121 0
54 GAL 045.5+00.0 HII 19 14 20.8 +11 09 04           ~ 141 0
55 CORNISH G045.4545+00.0591 HII 19 14 21.31 +11 09 11.7           ~ 157 1
56 GAL 043.89-00.78 HII 19 14 26.16 +09 22 34.0           ~ 53 0
57 IRAS 19181+1349 HII 19 20 30.95 +13 55 26.7           ~ 54 0
58 [KCW94] 048.606+00.024 Rad 19 20 31.1 +13 55 23           ~ 6 0
59 [WBN74] W 51 IRS 2 SFR 19 23 39.93 +14 31 09.4           ~ 321 0
60 NAME W 51 North Rad 19 23 40.0 +14 30 51           ~ 169 0
61 GAL 054.10-00.06 HII 19 31 42.22 +18 42 51.6           ~ 10 0
62 IRAS 19294+1836 Y*O 19 31 42.8 +18 42 33           ~ 16 0
63 NAME SH 2-87 IRS 1 HII 19 46 20.130 +24 35 29.43           ~ 17 0
64 SH 2-87 bub 19 46 20.69 +24 35 15.4           ~ 161 2
65 SH 2-88 B HII 19 46 48.2 +25 12 21           ~ 159 2
66 W 58a HII 20 01 45.8 +33 32 43           ~ 294 4
67 GAL 078.4+02.6 HII 20 19 39.22 +40 56 36.6           ~ 14 0
68 IRAS 20178+4046 HII 20 19 39.3 +40 56 30           ~ 48 1
69 V* BC Cyg s*r 20 21 38.5478957040 +37 31 58.925226936   14.61 11.30     M3.5Ia 171 0
70 GAL 075.83+00.40 HII 20 21 39.1455 +37 31 11.230           ~ 30 0
71 IRAS 20198+3716 mul 20 21 41.1 +37 25 54           ~ 17 1
72 NVSS J202141+372552 Rad 20 21 41.60 +37 25 52.1           ~ 16 2
73 GAL 075.78+00.34 cor 20 21 44.00 +37 26 38.0           ~ 131 1
74 WSRTGP 2025+3712 HII 20 27 26.4 +37 22 48           ~ 48 0
75 NAME SH 2-106 IR Y*O 20 27 26.502 +37 22 42.03           ~ 168 1
76 [KCW94] 081.679+00.537 Rad 20 39 01.332 +42 19 31.94           ~ 3 0
77 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
78 [KCW94] 109.871+02.113 Rad 22 56 18.185 +62 01 46.35           ~ 4 0
79 SH 2-159 Y*O 23 15 31.2384366062 +61 07 10.181362705           ~ 188 1
80 SH 2-157 B HII 23 16 04 +60 02.1           ~ 12 0
81 IRAS 23138+5945 mul 23 16 04.8 +60 02 00           ~ 46 0

To bookmark this query, right click on this link: simbad:objects in 2003MNRAS.343..143C and select 'bookmark this link' or equivalent in the popup menu