2007ApJ...661..801O

Query : 2007ApJ...661..801O

2007ApJ...661..801O - Astrophys. J., 661, 801-814 (2007/June-1)

The survey for ionization in neutral gas galaxies. III. Diffuse, warm ionized medium and escape of ionizing radiation.

OEY M.S., MEURER G.R., YELDA S., FURST E.J., CABALLERO-NIEVES S.M., HANISH D.J., LEVESQUE E.M., THILKER D.A., WALTH G.L., BLAND-HAWTHORN J., DOPITA M.A., FERGUSON H.C., HECKMAN T.M., DOYLE M.T., DRINKWATER M.J., FREEMAN K.C., KENNICUTT R.C.Jr, KILBORN V.A., KNEZEK P.M., KORIBALSKI B., MEYER M., PUTMAN M.E., RYAN-WEBER E.V., SMITH R.C., STAVELEY-SMITH L., WEBSTER R.L., WERK J. and ZWAAN M.A.

Abstract (from CDS):

We use the first data release from the SINGG Hα survey of H I-selected galaxies to study the quantitative behavior of the diffuse, warm ionized medium (WIM) across the range of properties represented by these 109 galaxies. The mean fraction fWIM of diffuse ionized gas in this sample is 0.59±0.19, slightly higher than found in previous samples. Since lower surface brightness galaxies tend to have higher fWIM, we believe that most of this difference is due to selection effects favoring large, optically bright, nearby galaxies with high star formation rates. As found in previous studies, there is no appreciable correlation with Hubble type or total star formation rate. However, we find that starburst galaxies, defined here by an Hα surface brightness >2.5x1039 erg/s/kpc2 within the Hα half-light radius, do show much lower fractions of diffuse Hα emission. The cause apparently is not dominated by a lower fraction of field OB stars. However, it is qualitatively consistent with an expected escape of ionizing radiation above a threshold star formation rate, predicted from our model in which the ISM is shredded by pressure-driven supernova feedback. The H I gas fractions in the starburst galaxies are also lower, suggesting that the starbursts are consuming and ionizing all the gas, and thus promoting regions of density-bounded ionization. If true, these effects imply that some amount of Lyman continuum radiation is escaping from most starburst galaxies, and that WIM properties and outflows from mechanical feedback are likely to be pressure-driven. However, in view of previous studies showing that the escape fraction of ionizing radiation is generally low, it is likely that other factors also drive the low fractions of diffuse ionized gas in starbursts.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Evolution - Galaxies: ISM - Galaxies: Starburst - ISM: H II Regions - Galaxies: Intergalactic Medium - ISM: Evolution

VizieR on-line data: <Available at CDS (J/ApJ/661/801): table1.dat>

Simbad objects: 111

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Number of rows : 111
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 ESO 409-15 EmG 00 05 31.86 -28 05 53.4   15.12   14.56 15.9 ~ 54 0
2 MCG-04-02-003 AG? 00 19 11.47 -22 40 05.8   15.90   14.8 15.2 ~ 31 0
3 ESO 473-24 AG? 00 31 22.51 -22 45 57.5   16.11   15.87 17.7 ~ 58 1
4 ESO 350-38 Sy2 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 378 0
5 NGC 178 GiG 00 39 08.3430707328 -14 10 21.981237024   13.6   13.4 13.1 ~ 67 0
6 IC 1574 AG? 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 129 1
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11150 1
8 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5839 1
9 NGC 625 AGN 01 35 04.632 -41 26 10.32 12.37 11.78 11.25 11.03 11.5 ~ 286 2
10 ESO 245-5 AG? 01 45 03.74 -43 35 52.9 13.45 12.92 12.63 12.51 12.8 ~ 140 1
11 ESO 52-10 AG? 01 56 50.50 -68 59 42.9   15.84   15.29 16.1 ~ 14 0
12 NGC 833 Sy2 02 09 20.8490871072 -10 07 59.003785884   14.02 13.00 12.75   ~ 191 0
13 NGC 835 Sy2 02 09 24.606 -10 08 09.31   13.29 12.45 12.24   ~ 206 0
14 NGC 838 LIN 02 09 38.562 -10 08 46.12   13.72   12.65   ~ 195 0
15 NGC 839 GiG 02 09 42.8 -10 11 02   13.98 11.42 12.70   ~ 151 0
16 NGC 873 EmG 02 16 32.3649137304 -11 20 54.546707076   13.1 12.71 12.174 13.0 ~ 73 0
17 NGC 894 Sy2 02 21 36.470 -05 31 17.02 12.21 12.26 11.73     ~ 147 2
18 LEDA 1043477 AG? 02 21 45.21 -05 32 07.5   17.3       ~ 14 0
19 LEDA 9103 EmG 02 23 50.72 -04 37 01.6   15.5   14.9 15.4 ~ 17 0
20 LEDA 3080368 EmG 02 24 29.9864160966 -24 44 43.937552173   16.10   15.26   ~ 13 0
21 NGC 922 EmG 02 25 04.400 -24 47 17.46   12.54 12.21 11.84   ~ 148 0
22 NGC 1042 EmG 02 40 23.9724818544 -08 26 00.736256616 11.47 11.56 11.02 11.7 11.4 ~ 260 1
23 ESO 154-23 AG? 02 56 50.38 -54 34 17.1   12.63   12.18 12.5 ~ 113 0
24 ESO 300-14 LSB 03 09 38.398 -41 01 54.23   13.12   12.10 12.8 ~ 72 0
25 ESO 300-16 AG? 03 10 10.48 -40 00 10.5   15.56   14.95   ~ 29 0
26 MCG-01-09-021 AG? 03 14 38.32 -04 46 26.1   13.9   14.1 14.0 ~ 43 0
27 ESO 481-17 AG? 03 17 04.4819793264 -22 51 59.796394380   13.18   11.81 12.6 ~ 41 0
28 NGC 1269 EmG 03 17 18.5785534752 -41 06 28.628735184 9.85 9.83 8.81 8.72   ~ 422 1
29 NGC 1311 Sy2 03 20 06.946 -52 11 07.76 13.89 13.35 12.93 12.75 13.1 ~ 124 0
30 NGC 1314 GiC 03 22 41.173 -04 11 11.55   13.4   13.4 13.3 ~ 27 0
31 IC 1959 GiG 03 33 12.576 -50 24 51.13 13.52 13.32 12.96 12.75 12.7 ~ 104 0
32 LEDA 135684 LSB 03 41 44.46 -02 00 08.8   15.3       ~ 15 0
33 APMUKS (BJ) B033959.58-133449.0 G 03 42 20.1 -13 25 18           ~ 2 0
34 NGC 1421 EmG 03 42 29.2806642840 -13 29 16.951034724   12.38       ~ 192 0
35 ESO 358-60 GiC 03 45 12.14 -35 34 15.3   15.86   15.46 16.6 ~ 73 0
36 ESO 302-10 AG? 03 48 30.13 -39 25 30.1   15.49   15.0 15.3 ~ 15 0
37 IC 2000 GiG 03 49 07.6548649395 -48 51 29.792967442   12.90   11.78 12.6 ~ 66 0
38 ESO 302-14 GiG 03 51 40.90 -38 27 08.0   14.84   14.54 14.8 ~ 53 0
39 NGC 1487 GiP 03 55 46.5 -42 22 01   12.28 11.68 11.74 11.02 ~ 111 0
40 NAME Schuster's Spiral GiP 03 58 56.3 -45 51 33   16.32   15.88   ~ 36 0
41 NAME Horologium Dwarf LSB 03 59 15.6 -45 52 21   15.19   15.05   ~ 39 0
42 NGC 1510 GiP 04 03 32.640 -43 24 00.58 14.23 13.63 13.24 13.09   ~ 188 1
43 NGC 1512 GiP 04 03 54.281 -43 20 55.86 11.30 11.43 10.54 10.37   ~ 396 1
44 NGC 1507 H2G 04 04 27.21 -02 11 18.9   12.8 12.36 13.0 12.9 ~ 132 0
45 NGC 1533 EmG 04 09 51.8356041744 -56 07 06.410207352   11.77 10.92 10.27 11.0 ~ 198 0
46 UGC 2983 GiG 04 12 52.4301816816 +02 22 10.725887820   15.3       ~ 35 0
47 UGC 3070 LSB 04 30 59.650 -02 00 12.01   14.90   14.4 14.6 ~ 55 0
48 IC 2089 AG? 04 32 50.403 -75 32 21.45   15.12   14.15 14.9 ~ 11 0
49 NGC 1637 Sy2 04 41 28.1926876152 -02 51 28.667815488   11.4   11.0 11.3 ~ 418 0
50 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 662 1
51 ESO 252-1 IG 04 56 58.3 -42 48 03   15.28   15.04   ~ 48 0
52 NGC 1744 LSB 04 59 57.7383643080 -26 01 19.840639764 12.43 11.90 11.41 11.20 11.7 ~ 148 0
53 ESO 85-34 GiG 05 03 17.2316212344 -63 45 03.828011256   13.76   12.39   ~ 18 0
54 ESO 486-21 AG? 05 03 19.69 -25 25 22.5 14.89 14.41 14.03 13.87 14.0 ~ 54 0
55 SINGG HIPASS J0503-63 S2 EmG 05 03 30.4 -63 44 00           ~ 2 0
56 SINGG HIPASS J0504-16 S2 EmG 05 04 16.4 -16 37 56           ~ 2 0
57 MCG-03-13-063 EmG 05 04 31.2381829944 -16 35 04.802786916   14   13.84   ~ 18 0
58 NGC 1800 EmG 05 06 25.737 -31 57 15.21 13.51 13.19 12.70 12.48 12.9 ~ 178 1
59 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 721 3
60 MCG-03-14-001 AG? 05 07 46.90 -16 17 37.0   13.3   14.88 13.6 ~ 43 0
61 ESO 422-41 EmG 05 10 46.9969231512 -31 35 49.316938620   13.04 12.58 12.26 12.8 ~ 54 0
62 ESO 362-9 AG? 05 11 59.33 -32 58 21.4 13.66 13.05 12.67 12.55 12.7 ~ 59 0
63 MCG-02-25-013 GiP 09 43 17.889 -09 56 44.33   13.7   13.18 13.9 ~ 43 0
64 UGCA 175 EmG 09 43 36.178 -05 54 45.08   13.3   13.4 13.4 ~ 38 0
65 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5861 6
66 UGCA 193 GiG 10 02 36.00 -06 00 49.0 15.70 15.16 14.74 14.55 14.3 ~ 74 0
67 NGC 3200 AG? 10 18 36.5393422320 -17 58 57.031507560   12.92   11.78 12.1 ~ 124 0
68 NGC 3365 GiG 10 46 12.649 +01 48 47.95   13.0   13.0 12.9 ~ 100 0
69 ESO 569-14 EmG 10 51 24.093 -19 53 26.62   13.83   12.69 13.2 ~ 61 0
70 ESO 569-20 AG? 10 54 21.04 -18 11 55.6   15.39   14.81   ~ 14 0
71 ESO 569-21 EmG 10 54 39.3145893216 -18 14 39.628554108   15.77   14.72   ~ 8 0
72 NGC 3521 G 11 05 48.5680991376 -00 02 09.245076540 10.06 9.83 9.02 10.1 9.6 ~ 817 2
73 LEDA 3097702 AG? 11 06 11.6526 -14 24 21.213   15.8       ~ 16 0
74 IC 2627 EmG 11 09 53.3868003696 -23 43 33.192730524   12.67   11.36 11.9 ~ 109 0
75 NGC 3660 Sy2 11 23 32.2781260536 -08 39 30.730097016   15.34 14.45     ~ 178 0
76 UGC 6510 EmG 11 31 32.0801139504 -02 18 33.136085772   14.0       ~ 50 0
77 SINGG HIPASS J1131-02 S3 EmG 11 31 37.9 -02 20 33           ~ 2 0
78 LEDA 1094786 AG? 11 31 42.10272 -02 20 25.5696   16.99   16.10   ~ 9 0
79 UGC 7332 AG? 12 17 55.905 +00 26 11.10   14.8   14.7 16.6 ~ 52 0
80 NGC 4487 EmG 12 31 04.4731449720 -08 03 14.548820040   11.7   11.9 11.6 ~ 176 0
81 UGCA 289 GiG 12 35 37.0 -07 52 41   13.3   13.3 13.0 ~ 42 0
82 UGCA 307 GiG 12 53 56.5587 -12 06 19.455   14.0   14.2 14.1 ~ 53 0
83 UGCA 320 GiP 13 03 16.736 -17 25 22.91 13.98 13.42 13.09 12.96 13.3 ~ 122 0
84 NGC 5068 AG? 13 18 54.807 -21 02 20.76 11.24 10.53 10.01 9.78 10.1 ~ 292 0
85 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2573 2
86 ESO 444-84 GiC 13 37 19.99 -28 02 42.0 16.04 15.34 15.05 15.05 14.9 ~ 121 1
87 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1366 4
88 NGC 5264 GiG 13 41 36.683 -29 54 47.25 13.86 12.96 12.39 12.14 15.83 ~ 152 1
89 IC 4901 GiG 19 54 23.5602286656 -58 42 48.989845872   12.29   11.02 11.6 ~ 70 0
90 IC 4951 EmG 20 09 31.77 -61 51 01.7 14.74 14.23 13.84 13.68 14.0 ~ 66 0
91 IC 5052 G 20 52 01.633 -69 11 35.93 12.83 12.20 11.66 11.40   ~ 154 0
92 IC 5078 EmG 21 02 31.2399855096 -16 49 05.333334780   12.8   12.60 12.7 ~ 65 0
93 NGC 7125 GiP 21 49 15.945 -60 42 47.42   12.70 12.37 11.77   ~ 65 0
94 NGC 7126 Sy2 21 49 18.1342577688 -60 36 32.990119740   12.99 12.36 11.81   ~ 69 0
95 ESO 145-18A AG? 21 49 38.73 -60 39 46.9           ~ 6 0
96 NGC 7184 AG? 22 02 39.8286792432 -20 48 45.720207216   11.98 11.20 10.62   ~ 140 0
97 LEDA 835679 G 22 02 53.3 -20 52 58           ~ 3 0
98 IC 5176 Sy2 22 14 55.928 -66 50 57.88   13.54   11.97 12.4 ~ 102 0
99 APMUKS (BJ) B221353.45-430010.3 AG? 22 16 54.6354 -42 45 17.942           ~ 8 0
100 IC 5201 AG? 22 20 57.437 -46 02 09.06   11.53   10.71 11.7 ~ 118 0
101 ESO 238-5 AG? 22 22 30.4713 -48 24 22.941   15.0   14.9 15.4 ~ 39 0
102 MCG-01-57-015 AG? 22 34 54.47 -04 42 04.9   14.5   14.6 14.7 ~ 36 0
103 ESO 290-28 AG? 22 57 09.00 -42 48 16.1   14.30   13.57 13.9 ~ 37 0
104 NGC 7424 EmG 22 57 18.3924511080 -41 04 14.124670032   10.88 10.38 10.02 10.9 ~ 219 0
105 ESO 347-17 GiG 23 26 56.21 -37 20 48.9 14.90 14.69 14.35 14.19 14.2 ~ 67 0
106 ESO 291-31 AG? 23 34 20.83 -45 59 49.7   15.46   14.91 15.6 ~ 16 0
107 IC 5332 GiG 23 34 27.488 -36 06 03.89 11.59 11.27 10.72 10.50 11.2 ~ 179 0
108 NGC 7713 EmG 23 36 15.154 -37 56 22.18   11.63   11.09 11.6 ~ 141 0
109 ESO 471-6 G 23 43 45.549 -31 57 24.37 14.55 14.03 13.73 13.63   ~ 147 1
110 ESO 348-9 AG? 23 49 23.4984 -37 46 25.536   14.6   14.7 14.4 ~ 58 0
111 ESO 149-3 AG? 23 52 02.15 -52 34 33.9 15.48 15.10 14.89 14.84 14.9 ~ 79 0

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