2002ApJ...566..880G


Query : 2002ApJ...566..880G

2002ApJ...566..880G - Astrophys. J., 566, 880-897 (2002/February-3)

The excitation and metallicity of galactic H II regions from Infrared Space Observatory SWS observations of mid-infrared fine-structure lines.

GIVEON U., STERNBERG A., LUTZ D., FEUCHTGRUBER H. and PAULDRACH A.W.A.

Abstract (from CDS):

We present mid-infrared Infrared Space Observatory Short-Wavelength Spectrometer (ISO-SWS) observations of the fine-structure emissions lines [Ne II] 12.8 µm, [Ne III] 15.6 µm, [Ne III] 36.0 µm, [Ar II] 6.99 µm, [Ar III] 8.99 µm, [S III] 18.7 µm, [S III] 33.5 µm, and [S IV] 10.5 µm and the recombination lines Brα and Brβ in a sample of 112 Galactic H II regions and 37 nearby extra-Galactic H II regions in the LMC, SMC, and M33. We selected our sources from archival ISO-SWS data as those showing prominent [Ne II] 12.8 µm or [Ne III] 15.6 µm emissions. The Galactic sources have a wide range in galactocentric distance (0kpc≲Rgal≲18 kpc), which enables us to study excitation and metallicity variations over large Galactic scales. We detect a steep rise in the [Ne III] 15.6 µm/[Ne II] 12.8 µm, [Ar III] 8.99 µm/[Ar II] 6.99 µm, and [S IV] 10.5 µm/[S III] 33.5 µm excitation ratios from the inner Galaxy outward, and a moderate decrease in metallicity, from ∼2 Z in the inner Galaxy to ∼1 Z in the outer disk. The extra-Galactic sources in our sample show low gas density, low metallicity, and high excitation. We find a good correlation between [Ne III] 15.6 µm/[Ne II] 12.8 µm and [Ar III] 8.99 µm/[Ar II] 6.99 µm excitation ratios in our sample. The observed correlation is well reproduced by theoretical nebular models that incorporate new-generation wind-driven non-LTE model stellar atmospheres for the photoionizing stars. In particular, the non-LTE atmospheres can account for the production of [Ne III] emission in the H II regions. We have computed self-consistent nebular and stellar atmosphere models for a range of metallicities (0.5-2 Z). We conclude that the increase in nebular excitation with galactocentric radius is due to an increase in stellar effective temperature (as opposed to a hardening of the stellar spectral energy distributions due to the metallicity gradient). We estimate an integrated [Ne III] 15.6 µm/[Ne II] 12.8 µm ratio for the Galaxy of 0.8, which puts it well inside the range of values for starburst galaxies. The good fit between observations and our models support the conclusion of Thornley and coworkers that the low [Ne III] 15.6 µm/[Ne II] 12.8 µm ratios observed in extra-Galactic sources are due to global aging effects.

Abstract Copyright:

Journal keyword(s): Galaxies: Individual: Messier Number: M33 - Galaxy: Abundances - Galaxy: Stellar Content - ISM: H II Regions - Galaxies: Magellanic Clouds - Stars: Atmospheres

VizieR on-line data: <Available at CDS (J/ApJ/566/880): table2.dat table56.dat>

Nomenclature: Tables 2, 5, 6: [GSL2002] NNN (Nos 1-149).

Errata: Erratum vol. 575, p. 585 (2002)

Simbad objects: 194

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Number of rows : 194
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     ~ 10602 1
2 SNR B0057-72.2 SNR 00 59 27.40 -72 10 10.7   12.37 12.57     ~ 234 0
3 [GSL2002] 1 HII 01 07 50.5 +65 21 23           ~ 2 0
4 GAL 124.64+02.54 HII 01 07 50.70 +65 21 21.4           ~ 46 0
5 [GSL2002] 2 HII 01 07 50.7 +65 21 22           ~ 2 0
6 HD 7113 Em* 01 09 12.94464 -73 11 38.8968     11.7     ~ 120 0
7 [GSL2002] 129 HII 01 24 08.0 -73 09 03           ~ 1 0
8 LHA 115-N 88 HII 01 24 08.1 -73 09 04           ~ 69 1
9 [GSL2002] 130 HII 01 24 08.1 -73 09 03           ~ 1 0
10 NGC 588 HII 01 32 45.2 +30 38 54 14.59 14.40 14.44 14.89 15.16 ~ 120 1
11 IC 132 HII 01 33 15.8 +30 56 45 15.08 14.87 14.82 15.24 15.43 ~ 47 1
12 BCLMP 623 HII 01 33 15.9 +30 53 02     12.2     ~ 86 0
13 IC 133 HII 01 33 15.9 +30 53 02     12.2     ~ 86 0
14 [GSL2002] 144 HII 01 33 16.3 +30 52 48           ~ 1 0
15 BCLMP 638E HII 01 33 16.3 +30 56 44           ~ 3 0
16 [GSL2002] 143 HII 01 33 16.5 +30 52 49           ~ 1 0
17 VGHC 2-33 HII 01 33 29.1 +30 31 47           ~ 13 0
18 BCLMP 45 HII 01 33 29.20 +30 40 25.4 15.58 15.55 15.66 15.72 15.97 ~ 18 0
19 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 201 0
20 BCLMP 41 SN* 01 33 35.5 +30 39 30     15.1     ~ 9 0
21 BCLMP 251 HII 01 33 37.80 +30 20 09.7     16.1     ~ 10 0
22 BCLMP 27 HII 01 33 45.58 +30 36 48.6     15.2     ~ 12 0
23 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5640 1
24 BCLMP 4 HII 01 33 59.44 +30 35 49.6     14.3     ~ 20 0
25 VGHC 2-77 HII 01 34 00.19 +30 40 50.0     15.4     ~ 17 0
26 BCLMP 302 HII 01 34 06.85 +30 47 27.6     14.4     ~ 29 0
27 BCLMP 95 HII 01 34 10.9 +30 36 18     14.5     ~ 15 0
28 BCLMP 710 Cl? 01 34 13.666 +30 33 43.35 15.67 15.75 15.90 15.94 16.22 ~ 23 0
29 BCLMP 88W HII 01 34 15.5 +30 37 12           ~ 6 0
30 VGHC 2-95 PoG 01 34 15.6 +30 37 11 14.69 14.61 14.70 14.85 14.97 ~ 23 0
31 BCLMP 691 HII 01 34 16.64 +30 51 53.7 14.80 14.63 14.66 14.76 14.76 ~ 30 0
32 BCLMP 680C HII 01 34 32.1 +30 47 00           ~ 3 0
33 NGC 604 HII 01 34 32.1 +30 47 01           ~ 579 0
34 BCLMP 680B HII 01 34 33.5 +30 46 50           ~ 3 0
35 IRAS 01420+6401 HII 01 45 40.16013 +64 16 09.0770           ~ 27 1
36 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 343 0
37 [GSL2002] 5 HII 02 25 44.6 +62 06 11           ~ 3 0
38 NAME W 3A 02219+6125 HII 02 25 44.6 +62 06 11           ~ 8 0
39 IRAS 02383+6241 HII 02 42 21.87840 +62 54 03.3160           ~ 29 1
40 SH 2-212 HII 04 40 36.50 +50 27 44.3           ~ 96 2
41 BRHT 1a Cl* 04 51 51.3 -69 23 26           ~ 42 0
42 NGC 1722 HII 04 51 53.36 -69 23 25.9           ~ 69 0
43 NGC 1714 EmO 04 52 08.4 -66 55 23   11.51 11.61     ~ 82 2
44 LHA 120-N 83B HII 04 54 25.2 -69 11 00           ~ 47 1
45 IRAS 04571-6627 mul 04 57 15.5 -66 23 14           ~ 52 1
46 HD 32340 Em* 04 57 16.253 -66 23 20.94   13.11 12.45 14.00   O3-O6V 77 0
47 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16642 1
48 [GSL2002] 9 HII 05 34 56.5 -05 17 02           ~ 2 0
49 [GSL2002] 10 HII 05 35 00.1 -05 17 06           ~ 2 0
50 [GSL2002] 11 HII 05 35 13.7 -05 22 08           ~ 2 0
51 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 624 1
52 [GSL2002] 14 HII 05 35 14.7 -05 23 41           ~ 2 0
53 NAME Orion Peak 2 PoC 05 35 15.74 -05 22 39.9           ~ 21 0
54 M 42 OpC 05 35 17 -05 23.4           ~ 3983 0
55 [GSL2002] 16 HII 05 35 18.2 -05 24 40           ~ 5 0
56 [GSL2002] 17 HII 05 35 19.3 -05 25 00           ~ 2 0
57 [GSL2002] 18 HII 05 35 19.8 -05 25 10           ~ 6 0
58 [GSL2002] 19 HII 05 35 20.3 -05 25 19           ~ 2 0
59 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 824 0
60 NAME Ori A MoC 05 38 -07.1           ~ 2913 0
61 [GSL2002] 114 HII 05 38 35.4 -69 05 41           ~ 8 0
62 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1143 2
63 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1924 1
64 [GSL2002] 113 HII 05 38 42.6 -69 06 02           ~ 1 0
65 [GSL2002] 117 HII 05 38 44.5 -69 04 58           ~ 1 0
66 [GSL2002] 115 HII 05 38 54.2 -69 05 15           ~ 1 0
67 [GSL2002] 116 HII 05 38 54.2 -69 05 15           ~ 1 0
68 NGC 2080 HII 05 39 42.6 -69 38 50           ~ 98 1
69 [JHS86] N160A-9 HII 05 39 43.3 -69 38 51           ~ 23 0
70 [GSL2002] 123 HII 05 39 43.7 -69 38 30           ~ 2 0
71 NAME LHA 120-N 160A IR Y*O 05 39 43.822 -69 38 33.84           ~ 14 1
72 [GSL2002] 122 HII 05 39 46.1 -69 38 37           ~ 23 0
73 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 271 2
74 [GSL2002] 119 HII 05 40 02.4 -69 44 33           ~ 1 0
75 NGC 2183 RNe 06 10 46.75 -06 12 44.9           ~ 77 1
76 RAFGL 890S MIR 06 10 50.60928 -06 11 51.2772           ~ 74 1
77 NAME GGD 12-15 OpC 06 10 52 -06 12.8           ~ 149 1
78 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4288 3
79 IRAS 09563-5743 HII 09 58 02.7 -57 57 52           ~ 14 0
80 [GSL2002] 22 HII 10 42 58.4 -59 32 54           ~ 2 0
81 [GSL2002] 23 HII 10 43 19.2 -59 34 19           ~ 3 0
82 [GSL2002] 24 HII 10 43 23.1 -59 34 28           ~ 2 0
83 Caswell H2O 287.37-00.62 Mas 10 43 31.1 -59 34 15           ~ 3 0
84 GAL 287.39-00.63 HII 10 43 40.1 -59 35 44           ~ 7 0
85 Cl Trumpler 14 OpC 10 43 57 -59 33.2   5.70 5.5     ~ 489 0
86 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 980 2
87 [BNM96] 289.880-0.799 HII 11 00 59.4892543320 -60 50 22.768640052           ~ 35 0
88 NGC 3603 OpC 11 15 11 -61 15.5           ~ 1037 1
89 GRS G291.86 -00.68 HII 11 16 33.8 -61 29 59           ~ 20 0
90 IRAS 12073-6233 mul 12 10 00.4 -62 49 57           ~ 49 0
91 [GS70] 298.2-00.3 HII 12 10 01.886 -62 50 00.46           ~ 66 1
92 IRAS 12331-6134 HII 12 36 01.9 -61 51 04           ~ 22 0
93 IRAS 12405-6238 HII 12 43 31.752 -62 55 09.84           ~ 24 0
94 RAFGL 4176 Y*O 13 43 01.70352 -62 08 51.2304           ~ 146 0
95 [GGB2012] G308.9176+00.1231 HII 13 43 02.1 -62 08 52           ~ 59 0
96 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2780 2
97 RAFGL 4972S cor 15 00 34.52760 -58 58 08.9076           ~ 47 1
98 OH 318.95 -0.20 Y*O 15 00 55.35024 -58 58 53.2848           ~ 79 1
99 IRAS 15100-5613 HII 15 13 50.2 -56 24 46           ~ 15 0
100 IRAS 15384-5348 HII 15 42 17.787 -53 58 30.88           ~ 38 1
101 [DBS2003] 95 HII 15 44 42.8 -54 05 56           ~ 57 0
102 RCW 97 HII 15 53 05.0 -54 35 24           ~ 154 0
103 IRAS 15502-5302 HII 15 54 07.2 -53 11 20           ~ 45 0
104 IRAS 15567-5236 HII 16 00 32.9 -52 44 45           ~ 28 0
105 OH 331.28 -0.19 Mas 16 11 26.59 -51 41 56.7           ~ 30 0
106 GAL 331.28-00.19 HII 16 11 26.6 -51 41 57           ~ 37 0
107 IRAS 16172-5028 HII 16 21 00.4 -50 35 21           ~ 37 0
108 GAL 333.13-00.43 Cld 16 21 02.7 -50 35 58           ~ 8 0
109 IRAS 16374-4701 HII 16 41 08.3 -47 07 22           ~ 42 0
110 IRAS 17059-4132 HII 17 09 31.3 -41 35 56           ~ 28 0
111 GAL 350.10+00.09 HII 17 19 26.1 -37 10 54           ~ 32 0
112 NGC 6334A HII 17 20 19.3 -35 54 55           ~ 117 0
113 NGC 6334 HII 17 20 53 -36 07.9           ~ 658 0
114 CXOU J172053.4-354701 * 17 20 53.432 -35 47 02.26           ~ 23 1
115 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 223 1
116 [GSL2002] 49 HII 17 24 40.3 -34 10 20           ~ 4 0
117 NGC 6357 OpC 17 24 44 -34 12.2           ~ 270 0
118 GAL 351.47-00.46 HII 17 25 33.0 -36 22 05           ~ 12 0
119 [GSL2002] 51 HII 17 25 34.9 -34 22 36           ~ 3 0
120 GAL 354.20-00.05 HII 17 31 17.9 -33 52 03           ~ 7 0
121 [GSL2002] 53 HII 17 44 35.6 -29 27 29           ~ 2 0
122 NAME Sgr C MoC 17 44 36.3 -29 28 13           ~ 344 0
123 [GSL2002] 55 HII 17 45 38.6 -29 01 06           ~ 3 1
124 RAFGL 2003 IR 17 45 39.1 -29 00 23           ~ 22 0
125 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13562 0
126 GCIRS 1W Em* 17 45 40.442 -29 00 27.51           Be? 102 0
127 GCIRS 23 OH* 17 45 42.70512 -28 59 57.6708           M7+III 26 0
128 [GSL2002] 59 HII 17 45 43.9 -28 48 38           ~ 4 1
129 [GSL2002] 60 HII 17 45 45.1 -28 50 19           ~ 3 1
130 NAME Arched Filaments PoC 17 45 46.9 -28 50 39           ~ 52 1
131 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 708 0
132 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 508 0
133 [GSL2002] 62 HII 17 46 14.2 -28 47 47           ~ 2 0
134 LHO 84 WR* 17 46 14.77 -28 49 34.2           WC9d 27 0
135 NAME GCS 3 I HII 17 46 14.9 -28 49 34           ~ 9 0
136 NAME Sickle HII 17 46 15.2 -28 49 49           ~ 119 0
137 [FMM95] 3 s*b 17 46 15.240 -28 50 03.58           LBV 148 1
138 WR 102ha WR* 17 46 15.86544 -28 49 45.6312           WC8/9d+OB 57 0
139 IRAS 17431-2846 IR 17 46 17.9 -28 48 01           ~ 10 0
140 GPSR5 0.099-0.167 Rad 17 46 30.69 -28 56 16.7           ~ 5 0
141 NAME Sgr D MoC 17 48 41.75 -28 01 45.0           ~ 130 1
142 NAME Sgr D HII HII 17 48 41.79 -28 01 41.3           ~ 65 1
143 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 347 0
144 GAL 007.47+00.06 HII 18 02 13.0 -22 27 52           ~ 41 0
145 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 199 0
146 GAL 013.88+00.28 HII 18 14 35.2 -16 45 21           ~ 56 0
147 [GSL2002] 73 HII 18 20 19.3 -16 13 01           ~ 3 1
148 [GSL2002] 74 HII 18 20 20.7 -16 12 51           ~ 2 0
149 [GSL2002] 76 HII 18 20 22.1 -16 12 41           ~ 1 0
150 [GSL2002] 75 HII 18 20 22.1 -16 12 41           ~ 2 0
151 [GSL2002] 77 HII 18 20 23.4 -16 12 31           ~ 2 0
152 [GSL2002] 78 HII 18 20 24.8 -16 12 21           ~ 2 0
153 [GSL2002] 79 HII 18 20 27.1 -16 12 28           ~ 5 0
154 [GSL2002] 80 HII 18 20 27.6 -16 12 01           ~ 3 0
155 [GSL2002] 81 HII 18 20 28.1 -16 11 51           ~ 2 0
156 AGAL G015.193-00.627 HII 18 20 32.8 -16 01 43           ~ 11 0
157 [GSL2002] 83 HII 18 20 46.9 -16 03 46           ~ 2 0
158 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1580 0
159 RAFGL 7009S HII 18 34 20.911 -05 59 42.23           ~ 206 0
160 [WAM82] 023.955+0.152 HII 18 34 24.9 -07 54 50           ~ 70 1
161 CORNISH G029.9559-00.0168 Y*O 18 46 04.18 -02 39 21.3           ~ 362 0
162 IRAS 18441-0134 IR 18 46 44.3 -01 30 55           ~ 11 0
163 GAL 031.40-00.26 HII 18 49 32.1 -01 29 04           ~ 44 0
164 RAFGL 5536 HII 18 50 30.8 -00 01 59           ~ 41 0
165 RAFGL 5541 Y*O 18 52 50.376 +00 55 26.48           ~ 114 0
166 IRAS 19110+1045 Y*O 19 13 22.0427 +10 50 53.336           ~ 123 0
167 GAL 045.5+00.0 HII 19 14 20.8 +11 09 04           ~ 139 0
168 CORNISH G045.4545+00.0591 HII 19 14 21.31 +11 09 11.7           ~ 154 1
169 GAL 049.20-00.35 Cl* 19 23 02.1 +14 16 40           ~ 64 0
170 [WBN74] W 51 IRS 2 PCG 19 23 39.93 +14 31 09.4           ~ 277 0
171 [GSL2002] 95 HII 20 01 45.5 +33 32 44           ~ 1 0
172 [GSL2002] 96 HII 20 01 45.7 +33 32 43           ~ 1 0
173 W 58a HII 20 01 45.8 +33 32 43           ~ 284 4
174 IRAS 20126+4104 Y*O 20 14 25.8816769656 +41 13 36.879427236           B2.5-B0.5 424 0
175 [GSL2002] 98 HII 20 27 25.7 +37 22 44           ~ 2 0
176 NAME SH 2-106 IR Y*O 20 27 26.502 +37 22 42.03           ~ 159 1
177 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 432 2
178 [GSL2002] 101 HII 20 39 00.9 +42 19 42           ~ 2 0
179 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 1019 0
180 JCMTSF J203908.0+421954 HII 20 39 08.628 +42 19 51.80           ~ 3 0
181 [GSL2002] 103 HII 21 28 40.2 +54 36 29           ~ 2 0
182 [GSL2002] 104 HII 21 28 40.2 +54 36 29           ~ 2 0
183 LBN 096.23+02.55 HII 21 28 42 +54 37.0           ~ 50 0
184 [GSL2002] 105 HII 21 28 41.9 +54 36 52           ~ 2 0
185 [GSL2002] 106 HII 21 28 43.2 +54 37 27           ~ 1 0
186 SH 2-128 HII 21 32 10.39293 +55 52 42.3590           ~ 164 1
187 SH 2-128 A HII 21 32 10.7 +55 52 45           ~ 4 0
188 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 652 2
189 IRAS 22176+6303 Y*O 22 19 17.978 +63 18 52.92           ~ 592 0
190 SH 2-138 HII 22 32 45.7 +58 28 20           ~ 111 2
191 [GSL2002] 109 HII 22 32 45.9 +58 28 20           ~ 2 0
192 [GSL2002] 110 HII 22 32 45.9 +58 28 22           ~ 1 0
193 SH 2-156 A HII 23 05 10.6 +60 14 41           ~ 7 0
194 SH 2-159 Y*O 23 15 31.2384366062 +61 07 10.181362705           ~ 179 2

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