1995A&A...303..361H

Query : 1995A&A...303..361H

1995A&A...303..361H - Astronomy and Astrophysics, volume 303361-378 (1995/11-2)

The CO and HI emission of spiral and lenticular galaxies in the Fornax cluster.

HORELLOU C., CASOLI F. and DUPRAZ C.

Abstract (from CDS):

We present a 12CO(1-0) and HI survey of the spirals and lenticulars in the nearby southern cluster of galaxies Fornax. We have not found any evidence for a strong HI deficiency in this cluster, which shows weak X-ray emission. However, three lenticular galaxies located near the cluster centre, NGC 1380, NGC 1386 and NGC 1387, present some HI deficiency with an HI content respectively 50, 25 and 16 times times lower than expected. On the other hand, the CO emission of Fornax galaxies is weak in general and we have clear detections of only 11 galaxies out of 21 observed. We have found that on the average, less than 10 percent of the gas in these galaxies is in the molecular phase, if the CO to H2 conversion factor has the same value as in our galaxy. We have compared these results with those of other extragalactic surveys and found that such low H2 contents are characteristic of samples that are not selected on a far-infrared criterion. In particular the nearby galaxies surveyed by Sage (1993a, b) also have a low CO emission, although to a lesser level. The low molecular gas content of Fornax galaxies is consistent with their low star formation activity suggested by their low far-infrared and nonthermal radiocontinuum emissions. We have made optical spectroscopical observations of the two CO-poor HI-rich spirals NGC 1350 and 1425 and have found that those galaxies have weak Hα emission. We have also mapped the CO(1-0) and (2-1) emission of the interacting spiral NGC 1532. The CO distribution shows two maxima at 7kpc radius, compatible with the presence of a molecular ring. As most of Fornax spirals NGC 1532 is very poor in molecular gas since it contains about 30 times less H2 than HI.

Abstract Copyright: ∼

Journal keyword(s): galaxies: spirals - galaxies: lenticulars - ISM: interactions - galaxies: clusters: Fornax cluster - radio lines: galaxies

Simbad objects: 46

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Number of rows : 46
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
4 NGC 828 AGN 02 10 09.5469097104 +39 11 25.233638244   13.0       ~ 171 1
5 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
6 NGC 1292 EmG 03 18 14.894 -27 36 37.19   12.75   11.78 12.2 ~ 105 0
7 NGC 1302 GiG 03 19 51.2026512864 -26 03 37.946814660   11.43   9.99 10.8 ~ 151 0
8 NGC 1310 Sy2 03 21 03.4175652072 -37 06 06.062937516 12.43 12.98 12.08 12.03   ~ 110 1
9 NGC 1317 GiP 03 22 44.2823209512 -37 06 13.180903956 12.20 11.78 11.02 10.22   ~ 240 1
10 NGC 1326 Sy1 03 23 56.3657298384 -36 27 52.322333040 11.69 11.43 10.54 10.02 10.9 ~ 279 2
11 NGC 1341 EmG 03 27 58.3983347688 -37 09 00.271891836   12.86   11.82   ~ 90 0
12 NGC 1351A GiG 03 28 48.718 -35 10 41.37   14.21   12.92 13.3 ~ 101 0
13 NGC 1350 Sy2 03 31 08.119 -33 37 43.10   11.20 10.52 9.77 10.6 ~ 191 0
14 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
15 NGC 1380 Sy2 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 460 1
16 NGC 1386 Sy1 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 553 1
17 NGC 1387 Sy2 03 36 57.0337458600 -35 30 23.675934060 12.18 11.75 10.69 10.16   ~ 290 1
18 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
19 NGC 1406 EmG 03 39 23.3038688087 -31 19 17.505737604   12.42   11.24 11.9 ~ 128 1
20 MCG-06-09-019 EmG 03 41 32.607 -34 53 18.01   13.95   13.02 13.8 ~ 106 0
21 NGC 1425 EmG 03 42 11.4831633240 -29 53 36.186684252   11.61   11.6 10.9 ~ 209 0
22 NGC 1436 GiG 03 43 37.0896438888 -35 51 11.004592644   12.49   11.16   ~ 143 0
23 MCG-06-09-030 Sy2 03 46 19.007 -34 56 36.83   12.57   12.3 11.9 ~ 136 0
24 IC 1993 GiG 03 47 04.8369103704 -33 42 35.877997728   12.50   11.16 11.7 ~ 93 0
25 NGC 1484 EmG 03 54 17.818 -36 58 14.70   13.67   12.96 13.4 ~ 70 0
26 NGC 1531 GiP 04 11 59.329 -32 51 02.85   13.11   12.12   ~ 71 0
27 NGC 1532 GiP 04 12 04.3612491792 -32 52 26.960041056   10.65   9.34 10.4 ~ 164 0
28 IC 2040 GiG 04 12 59.7779249448 -32 33 12.086162244   13.59   12.89   ~ 51 0
29 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
30 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
31 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
32 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 533 2
33 UGC 4881 IG 09 15 55.5 +44 19 58   14.9       ~ 178 0
34 NGC 3353 AGN 10 45 22.390 +55 57 37.36 12.90 13.25 12.79     ~ 378 1
35 NGC 4567 H2G 12 36 32.6979947472 +11 15 28.716262668 12.25 12.06 11.31     ~ 339 2
36 NGC 4568 H2G 12 36 34.292 +11 14 19.07   12.11 11.19     ~ 394 2
37 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
38 IC 883 SBG 13 20 35.37960 +34 08 21.8400   14.8       ~ 421 1
39 NGC 5256 PaG 13 38 17.81 +48 16 41.2   14.1 13.42     ~ 449 1
40 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
41 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
42 APG 293 G 16 58 27.8 +58 56 48           ~ 115 0
43 NGC 6286 AGN 16 58 31.3566512040 +58 56 10.114753560   14.2       ~ 202 1
44 NGC 6701 AGN 18 43 12.429 +60 39 12.13   12.9       ~ 142 1
45 NGC 6921 Sy2 20 28 28.8658027224 +25 43 24.094324884 15.41   12.897     ~ 104 1
46 Z 455-59 AGN 23 51 26.731 +20 35 10.22   14.9       ~ 237 0

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