2005ApJ...625..763L

Query : 2005ApJ...625..763L

2005ApJ...625..763L - Astrophys. J., 625, 763-784 (2005/June-1)

The molecular interstellar medium of dwarf galaxies on kiloparsec scales: a new survey for CO in northern, IRAS-detected dwarf galaxies.

LEROY A., BOLATTO A.D., SIMON J.D. and BLITZ L.

Abstract (from CDS):

We present a new survey for CO in dwarf galaxies using the ARO Kitt Peak 12 m telescope. This survey consists of observations of the central regions of 121 northern dwarfs with IRAS detections and no known CO emission. We detect CO in 28 of these galaxies and marginally detect another 16, increasing by about 50% the number of such galaxies known to have significant CO emission. The galaxies we detect are comparable in stellar and dynamical mass to the Large Magellanic Cloud, although somewhat brighter in CO and fainter in the far-IR. Within dwarfs, we find that the CO luminosity LCOis most strongly correlated with the K-band and the far-infrared luminosities. There are also strong correlations with the radio continuum (RC) and B-band luminosities and linear diameter. Conversely, we find that far-IR dust temperature is a poor predictor of CO emission within the dwarfs alone, although a good predictor of normalized CO content among a larger sample of galaxies. We suggest that LCOand LK correlate well because the stellar component of a galaxy dominates the midplane gravitational field and thus sets the pressure and density of the atomic gas, which control the formation of H2from H I. We compare our sample with more massive galaxies and find that dwarfs and large galaxies obey the same relationship between CO and the 1.4 GHz RC surface brightness. This relationship is well described by a Schmidt law with ΣRC∝Σ1.3CO. Therefore, dwarf galaxies and large spirals exhibit the same relationship between molecular gas and star formation rate (SFR). We find that this result is robust to moderate changes in the RC-to-SFR and CO-to-H2conversion factors. Our data appear to be inconsistent with large (order of magnitude) variations in the CO-to-H2conversion factor in the star-forming molecular gas.

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Journal keyword(s): Galaxies: Dwarf - Galaxies: ISM - ISM: Molecules - Stars: Formation

Simbad objects: 127

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Number of rows : 127
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 NGC 14 AG? 00 08 46.23168 +15 49 01.0452   13.3       ~ 107 0
2 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
3 NGC 100 LSB 00 24 02.837 +16 29 11.00   14.6       ~ 139 0
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
5 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 526 0
6 Z 437-11 LIN 01 42 48.32274 +13 09 20.8511   13.81       ~ 73 1
7 IC 1727 GiP 01 47 29.890 +27 20 00.06   12.54 11.98 11.77   ~ 216 0
8 Z 503-26 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 171 0
9 NGC 784 LSB 02 01 16.932 +28 50 14.13 12.97 12.50 12.07 11.83   ~ 212 0
10 NGC 949 GiG 02 30 48.6343005912 +37 08 11.754932532   12.667 11.975 11.490 10.790 ~ 152 0
11 NGC 959 GiG 02 32 23.9241457416 +35 29 40.455279636 12.87 12.95 12.38 11.79   ~ 123 1
12 Z 505-6 GiG 02 33 18.20 +33 29 28.0   14.9   13.59   ~ 91 0
13 Z 484-14 GiG 02 36 16.152 +25 25 25.75   14.00       ~ 122 0
14 NGC 1012 AG? 02 39 14.963 +30 09 06.01   13.1       ~ 99 1
15 NGC 1036 AG? 02 40 28.982 +19 17 49.48   13.5       ~ 125 0
16 Z 524-20 GiP 02 47 55.4194406880 +37 32 18.528735876   14.3   12.8   ~ 131 0
17 NGC 1156 GiG 02 59 42.8528847264 +25 14 28.352017320 12.13 12.32 11.74     ~ 323 1
18 NGC 1560 GiG 04 32 49.087 +71 52 59.20   12.1       ~ 264 0
19 Z 347-7 AG? 04 46 16.976 +76 25 08.04   15.5       ~ 75 0
20 Z 283-4 GiG 05 14 15.3240846648 +62 34 47.964904644   15.3       ~ 90 1
21 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
22 MCG+13-05-007a AG? 05 56 35.98 +75 19 01.9   17       ~ 89 0
23 Mrk 5 H2G 06 42 15.53 +75 37 32.6   17.0       ~ 114 0
24 NGC 2344 G 07 12 28.6727815248 +47 10 00.302868408   12.99 12.14 11.57 10.80 ~ 97 0
25 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
26 NGC 2500 GiG 08 01 53.1717201720 +50 44 13.602483780 11.98 12.20 11.62 11.34 10.85 ~ 215 2
27 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 253 1
28 NGC 2541 GiG 08 14 40.1160678912 +49 03 42.021679932 12.03 12.26 11.80     ~ 333 1
29 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
30 NGC 2552 EmG 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 284 1
31 Z 311-8 GiG 08 34 07.20 +66 10 54.0 15.39 15.03 14.70 14.49   ~ 357 2
32 Z 263-63 GiP 08 37 41.489 +51 39 08.58   13.50       ~ 149 1
33 Z 263-66 AG? 08 39 37.7100742728 +53 27 23.556371760   13.87       ~ 57 1
34 Z 239-19 H2G 09 40 27.0097822368 +48 20 15.466478856   13.5       ~ 77 0
35 Z 152-72 EmG 09 50 22.769 +31 29 17.80   14.48   14.10   ~ 207 0
36 NGC 3104 AG? 10 03 57.185 +40 45 41.43   14.2       ~ 142 0
37 Z 64-68 AG? 10 07 20.182 +10 21 40.16   13.78   13.24   ~ 125 0
38 NGC 3239 AG? 10 25 04.867 +17 09 49.21   13.5       ~ 202 0
39 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 703 1
40 Z 333-35 GiG 10 30 35.03 +70 37 07.2 14.81 13.69 13.01 12.73   ~ 140 0
41 NGC 3264 LSB 10 32 19.520 +56 05 06.60   14.3       ~ 72 0
42 Z 184-6 AG? 10 42 42.787 +34 26 57.39   13.31 13.09 12.84 12.85 ~ 173 0
43 NGC 3413 EmG 10 51 20.709 +32 45 58.94   13.1       ~ 130 0
44 NGC 3432 AG? 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 321 1
45 NGC 3510 LSB 11 03 43.356 +28 53 13.58   13.6       ~ 199 0
46 MCG+05-26-046 SBG 11 04 58.298 +29 08 16.54   15.5 15.29     ~ 228 0
47 Z 268-36 GiC 11 26 40.4656762968 +53 44 48.012539280   14.5       ~ 164 0
48 Z 314-27 AGN 11 26 50.460 +64 08 15.13   14.9       ~ 49 0
49 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
50 NGC 3773 H2G 11 38 12.967 +12 06 42.91   13.1       ~ 219 0
51 NGC 3782 GiG 11 39 20.680 +46 30 48.20   13.1       ~ 115 0
52 Z 242-72 AG? 11 40 05.7497793984 +45 56 31.750795896   14.6       ~ 87 0
53 NGC 3870 H2G 11 45 56.634 +50 11 59.66   13.2       ~ 155 1
54 NGC 3906 AG? 11 49 40.496 +48 25 33.46   14.1       ~ 103 0
55 NGC 3913 AG? 11 50 38.9407040280 +55 21 13.894641396   14.2       ~ 169 0
56 Z 157-55 AG? 11 55 39.7060218792 +31 31 06.535928784   15.7       ~ 138 0
57 Z 269-18 GiG 11 56 28.76784 +50 25 42.0132   14.0       ~ 148 0
58 NGC 3985 GiG 11 56 42.1288367760 +48 20 03.129462132   13.0       ~ 122 0
59 NGC 3990 GiP 11 57 35.5746104280 +55 27 31.486195296   13.57   12.10   ~ 124 0
60 NGC 4068 AG? 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 189 0
61 NGC 4080 GiG 12 04 51.804 +26 59 33.43   14.0       ~ 107 0
62 NGC 4136 GiG 12 09 17.7035859024 +29 55 39.419783832   11.69       ~ 244 1
63 NGC 4144 GiG 12 09 58.601 +46 27 25.85   12.17   11.50   ~ 260 0
64 NGC 4150 GiG 12 10 33.655 +30 24 05.35 12.72 12.44 11.64     ~ 331 2
65 NGC 4190 LSB 12 13 44.765 +36 38 02.49 13.88 13.40 13.25 12.86   ~ 224 0
66 NGC 4204 GiC 12 15 14.359 +20 39 32.68   14.3       ~ 162 0
67 NGC 4218 GiP 12 15 46.1787155088 +48 07 52.628679084   13.2       ~ 96 0
68 NGC 4299 GiC 12 21 40.548 +11 29 59.74   12.8       ~ 271 0
69 NGC 4309 GiP 12 22 12.349 +07 08 39.80   14.3       ~ 127 0
70 NGC 4310 GiG 12 22 26.2952460216 +29 12 31.220009820   13.22       ~ 100 1
71 Z 335-12 AG? 12 24 25.30 +70 20 01.0 13.93 13.38 12.86 12.60   ~ 74 0
72 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1286 1
73 NGC 4396 GiC 12 25 58.802 +15 40 17.28 12.94 13.06 12.58     ~ 207 1
74 Z 187-44 GiP 12 27 05.566 +37 08 30.39   14.19   13.55   ~ 217 0
75 Z 42-108 GiG 12 27 11.07 +07 15 47.3   15.3       ~ 106 0
76 Z 187-46 GiP 12 28 28.084 +37 14 05.36   15.6       ~ 105 0
77 NGC 4455 EmG 12 28 44.1242000448 +22 49 13.538159508   15.5       ~ 222 0
78 IC 3414 GiG 12 29 28.7704007928 +06 46 18.553776924   14.2       ~ 115 0
79 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
80 Z 216-10 LSB 12 32 26.893 +42 42 14.84   13.7       ~ 130 0
81 Z 159-13 GiC 12 32 54.5 +31 32 30   13.50   13.03   ~ 180 0
82 NGC 4509 GiG 12 33 06.500 +32 05 27.35   14.1       ~ 93 0
83 NGC 4534 EmG 12 34 05.412 +35 31 06.07   13.20       ~ 117 0
84 NGC 4618 GiP 12 41 32.8976471760 +41 09 03.185175528 11.03 11.22 10.78     ~ 344 2
85 NGC 4625 SyG 12 41 52.7121819576 +41 16 26.115765780 12.74 12.92 12.35     ~ 383 2
86 NGC 4630 H2G 12 42 31.146 +03 57 37.29   13.4       ~ 156 0
87 NGC 4633 GiP 12 42 37.3727566944 +14 21 25.949234160   14.7       ~ 147 0
88 NGC 4635 EmG 12 42 39.2394453696 +19 56 43.029692988   13.597 12.995 12.571 12.082 ~ 129 0
89 Z 159-67 GiG 12 44 38.1431512800 +28 28 20.905837968   14.7       ~ 66 0
90 IC 3742 GiG 12 45 31.234 +13 19 44.59   14.6       ~ 115 0
91 Z 159-74 AGN 12 46 55.4014910328 +26 33 51.475201632   15.0       ~ 64 0
92 NGC 4688 GiP 12 47 46.5220541760 +04 20 09.766119156   14.5       ~ 182 1
93 NGC 4701 AGN 12 49 11.5931072112 +03 23 19.389227964   13.1       ~ 181 0
94 NGC 4713 GiG 12 49 57.8802780576 +05 18 40.933127196   12.3       ~ 320 1
95 NGC 4765 GiG 12 53 14.6103052812 +04 27 47.472430278   13.0       ~ 130 0
96 Z 294-10 AG? 13 02 08.046 +58 42 02.04   14.6       ~ 85 0
97 Z 189-31 GiP 13 10 04.501 +34 10 51.35   15.1       ~ 79 0
98 IC 4213 GiG 13 12 11.217 +35 40 10.73   14.1       ~ 95 0
99 Z 189-42 GiP 13 13 17.60 +36 13 03.0   13.73   12.96   ~ 91 1
100 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
101 Z 189-45 H2G 13 14 48.796 +34 52 53.18   14.9       ~ 89 0
102 NGC 5107 GiP 13 21 25.269 +38 32 10.96   13.7       ~ 94 0
103 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 494 0
104 Z 101-61 AG? 13 30 58.9210443048 +19 26 21.843494952   14.00       ~ 70 0
105 NGC 5238 GiP 13 34 42.5146948080 +51 36 49.168365696   14.2       ~ 143 0
106 NGC 5338 AG? 13 53 26.5503668640 +05 12 27.975949560   14.3       ~ 118 0
107 NGC 5474 GiP 14 05 01.608 +53 39 43.95   11.28 10.79     ~ 475 1
108 NGC 5477 AG? 14 05 33.318 +54 27 37.85 13.94 14.36 14.01     ~ 224 1
109 NGC 5585 GiG 14 19 48.204 +56 43 44.58   11.73 11.216 11.12 10.123 ~ 455 0
110 MCG+10-21-013 AG? 14 35 24.077 +57 15 21.24   17       ~ 91 0
111 NGC 5832 AG? 14 57 45.90 +71 40 53.5 13.43 12.80 12.26 11.96   ~ 125 1
112 NGC 5949 AG? 15 28 00.6695692032 +64 45 47.413223532   12.70       ~ 152 0
113 NGC 5963 EmG 15 33 27.7333715909 +56 33 33.938950529   13.34 13.65     ~ 113 0
114 Z 274-49 bCG 15 37 04.237 +55 15 47.60   15.2       ~ 136 0
115 Z 251-4 AG? 16 16 17.9000468088 +47 02 43.128874644   14.9       ~ 151 0
116 Z 168-21 SBG 16 33 47.1783414768 +28 59 01.521191184   13.30 13.96     ~ 140 1
117 NGC 6255 LSB 16 54 47.963 +36 30 03.16   13.40       ~ 93 1
118 Z 252-39 LSB 17 18 51.409 +49 53 03.28   13.9       ~ 40 0
119 NGC 6689 AG? 18 34 50.244 +70 31 26.00   12.60       ~ 128 0
120 NGC 6789 AG? 19 16 41.169 +63 58 23.90   13.76       ~ 122 1
121 Z 530-4 AG? 22 03 33.88 +43 44 57.2   15.5       ~ 46 0
122 NGC 7292 AG? 22 28 26.291 +30 17 29.91   13.10       ~ 111 0
123 Z 514-45 GiG 22 30 33.98 +33 49 10.8   15.5       ~ 73 0
124 Z 495-7 AG? 22 34 10.90 +32 51 40.7   15.60       ~ 71 0
125 Z 533-8 GiG 23 29 58.540 +40 59 31.98   15.7       ~ 110 0
126 Z 476-106 GiP 23 40 39.86 +26 14 11.1   14.5       ~ 146 0
127 NAME Local Group GrG ~ ~           ~ 9325 0

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