2001AJ....122.1788I

Query : 2001AJ....122.1788I

2001AJ....122.1788I - Astron. J., 122, 1788-1795 (2001/October-0)

Lyman continuum extinction by dust in H II regions of galaxies.

INOUE A.K.

Abstract (from CDS):

We examine Lyman continuum extinction (LCE) in H II regions by comparing infrared fluxes of 49 H II regions in the Galaxy, M31, M33, and the Large Megellanic Cloud with estimated production rates of Lyman continuum photons. A typical fraction of Lyman continuum photons that contribute to hydrogen ionization in the H II regions of three spiral galaxies is ≲50%. The fraction may become smaller as the metallicity (or dust-to-gas ratio) increases. We examine the LCE effect on estimated star formation rates of galaxies. The correction factor for the Galactic dust-to-gas ratio is 2-5.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Galaxies: ISM - ISM: H II Regions - Infrared Radiation - Radio Continuum - Stars: Formation

CDS comments: table 1 : G343.4-0.4 misprint for GAL 353.4-0.4

Simbad objects: 67

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Number of rows : 67
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 [XH96] 25 HII 00 42 23.2 +41 28 03           ~ 2 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 [XH96] 30 HII 00 43 31.4 +41 42 52           ~ 2 0
4 [XH96] 16 HII 00 43 38.0 +41 10 28           ~ 2 0
5 [XH96] 17 HII 00 43 49.0 +41 01 13           ~ 2 0
6 [XH96] 31 HII 00 44 00.7 +41 48 58           ~ 2 0
7 [XH96] 27 HII 00 44 12.6 +41 33 28           ~ 2 0
8 [XH96] 22 HII 00 44 22.0 +41 20 38           ~ 2 0
9 [XH96] 33 HII 00 44 32.5 +41 52 00           ~ 2 0
10 [XH96] 23 HII 00 44 36.2 +41 25 03           ~ 2 0
11 [XH96] 35 HII 00 44 55.4 +41 54 57           ~ 2 0
12 [XH96] 28 HII 00 45 11.9 +41 36 54           ~ 2 0
13 [XH96] 39 HII 00 46 34.4 +42 11 46           ~ 2 0
14 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
15 VGHC 2-20 HII 01 32 39.9 -29 56 43           ~ 5 0
16 VGHC 2-25 HII 01 33 09 +30 27.3           ~ 3 0
17 IC 131 HII 01 33 15.0 +30 45 09   12.52       ~ 66 0
18 BCLMP 623 HII 01 33 15.9 +30 53 02     12.2     ~ 87 0
19 IC 133 HII 01 33 15.9 +30 53 02     12.2     ~ 88 0
20 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 213 0
21 VGHC 2-52 HII 01 33 40 +30 20.8           ~ 4 0
22 VGHC 2-46 HII 01 33 40 +30 20.8           ~ 4 0
23 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
24 VGHC 2-98 HII 01 34 16 +30 52.0           ~ 3 0
25 BCLMP 691 HII 01 34 16.64 +30 51 53.7 14.80 14.63 14.66 14.76 14.76 ~ 31 0
26 NGC 604 HII 01 34 32.1 +30 47 01           ~ 608 0
27 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1064 3
28 SNR J045447-662528 SNR 04 54 48.00 -66 25 42.0           ~ 111 0
29 DEM L 34 HII 04 56 34.3 -66 26 52           ~ 103 0
30 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 275 0
31 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
32 LI-LMC 1076 HII 05 26 34.9 -68 49 14           ~ 13 1
33 LHA 120-N 144 HII 05 26 42.5 -68 49 34           ~ 72 0
34 NGC 2014 As* 05 32 24 -67 41.3   9.17 8.97     ~ 77 0
35 LHA 120-N 57A HII 05 32 28.2 -67 42 11           ~ 52 1
36 LHA 120-N 154 HII 05 35 04.8 -69 43 25           ~ 48 0
37 NGC 2029 SNR 05 35 15.5 -67 34 04     12.29     ~ 108 0
38 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
39 NGC 2032 HII 05 35 23.5 -67 34 56           ~ 75 1
40 NGC 2048 EmO 05 35 55 -69 39.0   12.05 12.17     N 26 0
41 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
42 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
43 [MBB72] 90 Rad 05 47 53 -70 03.1           ~ 2 0
44 LHA 120-N 180C EmO 05 48 15.1 -70 02 03           ~ 13 0
45 LHA 120-N 180A EmO 05 48 44 -70 03.2           ~ 17 0
46 NGC 2122 As* 05 48 55 -70 04.1     10.43     ~ 92 0
47 DEM L 325 HII 05 48 58.0 -69 59 43           ~ 8 0
48 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
49 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
50 HD 152723 SB* 16 56 54.6694171728 -40 30 44.442698436 6.43 7.24 7.10 8.11 8.47 O6.5III(f) 163 0
51 RCW 117 HII 17 09 34.0 -41 36 12           ~ 70 2
52 BFS 65 HII 17 20 06.91 -38 57 34.1           ~ 81 1
53 GAL 351.6+00.2 HII 17 23 20 -35 54.3           ~ 4 0
54 NGC 6357 OpC 17 24 44 -34 12.2           ~ 303 0
55 IRAS 17258-3637 HII 17 29 16.7 -36 40 13           ~ 60 0
56 GAL 353.4-00.4 HII 17 30 31.4 -34 40 59           ~ 20 0
57 NAME Sgr C MoC 17 44 36.3 -29 28 13           ~ 400 0
58 NAME Sgr B MoC 17 47 02 -28 25.4           ~ 241 0
59 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 380 0
60 M 8 OpC 18 03 37 -24 23.2           ~ 644 1
61 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
62 W 49 SFR 19 10 20 +09 07.7           ~ 601 1
63 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
64 CTB 82 Mas 20 01.7 +33 33           ~ 40 0
65 18P 59 HII 20 32 31.2 +40 16 35           ~ 75 0
66 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
67 NAME Cyg X FIR 36 Rad 20 39 01.6 +42 22 47           ~ 124 1

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