2001MNRAS.324..859B

Query : 2001MNRAS.324..859B

2001MNRAS.324..859B - Mon. Not. R. Astron. Soc., 324, 859-876 (2001/July-2)

A study of neutral hydrogen in five small galaxy groups.

BARNES D.G. and WEBSTER R.L.

Abstract (from CDS):

High-resolution Hi imaging observations of a heterogeneous sample of small galaxy groups are presented. The five galaxy groups studied show a broad range of individual Hi properties: e.g. loose groups surrounding LGG 138 and the genuinely compact LGG 455 are identified; a massive ring of neutral gas is discovered encircling two luminous galaxies in the LGG 138 group; a galaxy-sized mass of Hi is found in LGG 455 confined to an extragalactic cloud which exceeds the threshold density for star formation, yet is optically invisible; and the CCG 1 group is argued to be a chance alignment of Centaurus cluster galaxies. Global results of the study are that the deficit of Hi flux in synthesis imaging data compared with single-dish data is put forward as a quantitative measure of the diffuseness of neutral gas in galaxy groups; several groups contain gas-poor galaxies that ordinarily would contain detectable quantities of Hi - this is interpreted as being caused by an increased chance of gas-sweeping collisions in the group environment; and some evidence is found to support previous findings that compact groups preferentially occur in loose systems.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): galaxies: evolution - galaxies: interactions - radio lines: galaxies

Simbad objects: 50

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Number of rows : 50
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 UGC 2140 AG? 02 39 06.00 +18 23 05.0   14.6       ~ 48 0
2 HCG 31 CGG 05 01 37 -04 15.4           ~ 128 0
3 ESO 490-10 AG? 06 31 57.4929162624 -26 46 08.773018248   13.69   12.27 13.1 ~ 34 0
4 ESO 490-28 AG? 06 40 20.751 -27 05 51.39   14.91   13.53 14.3 ~ 36 0
5 ESO 490-37 GiG 06 44 22.5240364632 -26 06 31.559756148   12.96   12.9 12.2 ~ 33 0
6 NGC 2280 EmG 06 44 49.0852522224 -27 38 18.562480188   11.13   9.77 11.3 ~ 132 0
7 LGG 138 GrG 06 46 04.8 -27 07 00           ~ 8 0
8 ESO 490-41 GiG 06 46 22.0001051160 -26 06 31.527652716   13.47   12.03 12.4 ~ 35 0
9 ESO 490-44 AG? 06 46 44.18 -27 16 46.6   14.28   13.25 13.8 ~ 19 0
10 ESO 490-45 AG? 06 46 46.53 -26 28 29.8   14.04   13.29 14.0 ~ 40 0
11 ESO 490-46 AG? 06 47 20.8444812336 -25 36 59.297229468   15.61   14.59 14.8 ~ 16 0
12 NGC 2295 GiG 06 47 23.4051516168 -26 44 10.678368444   13.58   11.90   ~ 29 0
13 NGC 2292 AG? 06 47 39.65 -26 44 46.5   11.82   10.42   ~ 45 1
14 NGC 2293 AG? 06 47 42.912 -26 45 15.70   11.70   12.0 11.3 ~ 69 1
15 ESO 491-9 Sy2 06 55 25.1750224632 -26 36 26.258256360   14.84   13.55 13.5 ~ 40 0
16 HCG 44 CGG 10 18 00 +21 48.7           ~ 82 0
17 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 225 0
18 NGC 3267 GiG 10 29 48.6040695000 -35 19 20.428071096   13.50 13.35 11.85   ~ 40 0
19 NGC 3269 GiG 10 29 57.0426202656 -35 13 27.888395700   13.24 13.51 11.73   ~ 44 0
20 LGG 202 GrG 10 30 08 -35 18.5           ~ 4 0
21 NGC 3271 BiC 10 30 26.5035080808 -35 21 34.063890048   12.72 11.73 11.03   ~ 74 1
22 ESO 381-6 AG? 12 40 40.814 -36 44 20.06   15.92   14.89   ~ 19 0
23 NAME CCG 1 GrG 12 40 52 -36 44.0           ~ 1 0
24 AM 1238-362 G 12 40 52.3 -36 45 16           ~ 2 1
25 IC 3639 Sy2 12 40 52.8344884344 -36 45 21.057011172   13.01 13.50 11.87 12.7 ~ 247 1
26 ESO 381-9 AG? 12 40 58.4802509112 -36 43 55.005385692   13.92   12.68   ~ 35 1
27 ESO 381-14 GiC 12 44 09.569 -36 30 39.65   15.20   14.04 14.5 ~ 45 0
28 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1066 2
29 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 306 0
30 NAME HYA-CEN SUPERCL SCG 13 14 -33.3           ~ 139 0
31 HCG 79 CGG 15 59 11.605 +20 45 24.66           ~ 114 0
32 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1225 1
33 ESO 466-49 EmG 22 03 41.646 -27 56 04.34   15.54   14.83 15.1 ~ 12 0
34 HCG 91 CGG 22 09 00.8 -27 47 36           ~ 54 0
35 NGC 7214 Sy1 22 09 07.6631604816 -27 48 34.160960772   12.48 14.10 11.40   ~ 138 0
36 HCG 91d GiG 22 09 08.20 -27 48 01.0   12.64   11.57   ~ 23 0
37 ESO 467-13 EmG 22 09 13.9920880800 -27 46 55.650989460   14.76   13.99   ~ 55 0
38 NGC 7213 Sy1 22 09 16.2100443720 -47 10 00.115999716   10.97 12.08 10.50 10.6 ~ 653 0
39 ESO 467-15 Sy2 22 09 16.282 -27 43 49.04   15.04   13.93   ~ 34 0
40 IC 5171 AG? 22 10 56.7198972600 -46 04 53.235672312   13.45   12.19 12.4 ~ 45 0
41 ESO 288-49 AG? 22 11 48.56 -45 35 22.7   13.97   13.27 13.3 ~ 25 0
42 IC 5181 GiG 22 13 21.6790033968 -46 01 03.201587940   12.44 11.69 10.91   ~ 77 0
43 LGG 455 GrG 22 14 40 -45 55.1           ~ 8 0
44 HIPASS J2215-45 G 22 15 36.6 -45 51 09           ~ 3 0
45 NGC 7232 GiP 22 15 38.0197322088 -45 51 00.409784904   12.58 11.79 11.00 11.9 ~ 58 0
46 NGC 7233 GiP 22 15 48.992 -45 50 47.06   12.90 12.82 11.81   ~ 51 0
47 ESO 289-9 EmG 22 15 52.9160 -45 46 59.677   13.47   12.57 12.2 ~ 32 0
48 ESO 289-10 AG? 22 16 43.293 -47 07 07.04   14.81   13.89 14.5 ~ 44 0
49 ESO 289-11 AG? 22 17 16.33 -45 03 59.4   14.94   13.90 15.0 ~ 17 0
50 ESO 289-19 G 22 21 06.9105879480 -43 52 53.995645920   16.01   15.14   ~ 16 2

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