2001A&A...371..806N

Query : 2001A&A...371..806N

2001A&A...371..806N - Astronomy and Astrophysics, volume 371, 806-815 (2001/6-1)

On faint companions in the close environment of star-forming dwarf galaxies. Possible external star formation triggers?

NOESKE K.G., IGLESIAS-PARAMO J., VILCHEZ J.M., PAPADEROS P. and FRICKE K.J.

Abstract (from CDS):

We have searched for companion galaxies in the close environment of 98 star-forming dwarf galaxies (SFDGs) from field and low density environments, using the NASA Extragalactic Database. Most of the companions are dwarf galaxies which due to observational selection effects were previously disregarded in environmental studies of SFDGs. A subsample at low redshift, cz<2000km/s, was chosen to partially eliminate the observational bias against distant dwarf companions. We find companion candidates for approximately 30% of the objects within a projected linear separation sp<100kpc and a redshift difference Δcz<500km/s. The limited completeness of the available data sets, together with the non-negligible frequency of HI clouds in the vicinity of SFDGs indicated by recent radio surveys, suggest that a considerably larger fraction of these galaxies may be accompanied by low-mass systems. This casts doubt on the hypothesis that the majority of them can be considered truly isolated. The velocity differences between companion candidates and sample SFDGs amount typically to ≲250km/s, and show a rising distribution towards lower Δcz. This is similarly found for dwarf satellites of spiral galaxies, suggesting a physical association between the companion candidates and the sample SFDGs. SFDGs with a close companion do not show significant differences in their Hβ equivalent widths and B-V colours as compared to isolated ones. However, the available data do not allow us to rule out that interactions with close dwarf companions can influence the star formation activity in SFDGs.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: compact - galaxies: evolution - galaxies: interaction

Simbad objects: 105

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Number of rows : 105
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 47 AG? 00 06 38.36 +17 17 03.4   17       ~ 20 0
2 LEDA 4188 H2G 01 10 34.9835563416 +02 06 50.968725948   16       ~ 24 0
3 LEDA 4692 GiC 01 18 34.5 +02 27 15   18       ~ 11 0
4 6dFGS gJ012646.5-003845 H2G 01 26 46.6028219232 -00 38 46.165233696   17   15.46   ~ 56 0
5 6dFGS gJ012915.8-393037 H2G 01 29 15.865 -39 30 38.03   16.68   15.64   ~ 22 0
6 LEDA 5593 GiC 01 30 03.502 +00 44 35.93   18       ~ 11 0
7 LEDA 5756 GiC 01 32 38.611 -01 38 54.01   16       ~ 12 0
8 LEDA 5809 AG? 01 33 41.41 -01 09 29.8   18       ~ 6 0
9 LEDA 5815 Sy1 01 33 44.6085535656 +00 57 11.273283396   18       ~ 24 0
10 LEDA 6001 H2G 01 37 11.1109651032 +00 52 56.671586796   18.6       ~ 22 0
11 LEDA 6065 H2G 01 38 22.6 +01 54 03   18       ~ 12 0
12 LEDA 6551 H2G 01 47 04.00 +02 41 36.0   18       ~ 12 0
13 2MASX J01483056-0003460 H2G 01 48 30.582 -00 03 46.42   17       ~ 18 0
14 SCHG 0147+020 H2G 01 50 10.00 +02 18 42.0   17       ~ 14 0
15 LEDA 6973 H2G 01 52 53.8243003632 -00 54 07.524735804   17       ~ 20 0
16 2MASS J01560620+0039110 GiC 01 56 06.1998687360 +00 39 11.172689028   18       ~ 9 0
17 Mrk 1169 H2G 01 57 38.9298229056 +02 25 24.542404968   17.0       ~ 26 0
18 LEDA 7422 EmG 01 58 09.3923460120 -00 06 37.007607240           ~ 30 0
19 LEDA 8099 AG? 02 07 26.48 +02 56 55.2   18       ~ 26 0
20 UM 404 EmO 02 10 12.20 -01 24 49.0   18       ~ 9 0
21 LEDA 8347 H2G 02 10 58.3 -01 27 38   16.65       ~ 10 0
22 LEDA 8377 H2G 02 11 23.38 +02 20 29.7   18       ~ 43 0
23 MCG+00-06-050 H2G 02 12 00.4106748552 +01 13 32.083467384   16       ~ 12 0
24 LEDA 8493 H2G 02 13 06.6126744312 +00 56 12.461042400           ~ 17 0
25 LEDA 8865 AG? 02 19 30.236 -00 59 06.46 17.71 18.15 17.57 17.44 17.35 ~ 30 0
26 UGC 1865 AG? 02 25 00.22 +36 02 16.0   16.5   14.78   ~ 46 0
27 NGC 1036 AG? 02 40 28.982 +19 17 49.48   13.5       ~ 117 0
28 Mrk 600 AG? 02 51 04.57 +04 27 13.9 14.76 15.07 14.70 14.50 14.29 ~ 123 0
29 UGC 2432 AG? 02 57 26.94 +10 08 09.6   17       ~ 16 0
30 UGC 2482 EmG 03 01 03.286 -00 44 36.47   15.3 16.5 15.4 15.3 ~ 26 0
31 UGC 2809 AG? 03 39 33.17 +19 47 02.5   16.5       ~ 10 0
32 LEDA 74944 EmG 03 42 49.4 -40 35 56 15.90 16.41 15.75 16.05 15.55 ~ 32 0
33 UGC 3174 GiC 04 48 34.50 +00 14 30.0   14.7   13.9 14.4 ~ 66 0
34 NAME Zw II 33 B GiC 05 10 45.869 -02 45 34.93           ~ 8 0
35 Mrk 1094 bCG 05 10 48.1123757064 -02 40 53.685168744   14.0 14.4     ~ 88 1
36 Mrk 5 H2G 06 42 15.53 +75 37 32.6   17.0       ~ 110 0
37 UGC 3516 AG? 06 43 08.51 +22 52 24.9   17       ~ 17 0
38 UGC 3658 AG? 07 04 40.10 +17 35 00.0   17       ~ 16 0
39 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 564 3
40 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 769 0
41 NGC 2537 AG? 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 301 2
42 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 1106 1
43 NGC 3353 AGN 10 45 22.390 +55 57 37.36 12.90 13.25 12.79     ~ 359 1
44 Mrk 36 SBG 11 04 58.298 +29 08 16.54   15.5 15.29     ~ 225 0
45 UGC 6345 B H2G 11 20 14.60 +02 31 51.0   18       ~ 24 1
46 IC 691 AGN 11 26 44.31576 +59 09 19.5120   14.2       ~ 100 0
47 UGC 6456 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 335 1
48 UGC 6578 EmG 11 36 36.636 +00 49 02.61   15.3   14.518 15.1 ~ 122 0
49 2dFGRS TGN375Z058 H2G 11 37 42.233 -00 02 40.06   18       ~ 16 0
50 Mrk 1303 Sy1 11 40 13.2338088216 -00 24 42.171461028   16.5   16.116   ~ 33 0
51 2dFGRS TGN238Z191 H2G 11 41 45.6317036136 -01 54 05.199432804   17   16.007   ~ 27 0
52 2dFGRS TGN310Z174 Sy1 11 47 00.736 -00 17 38.88   15.1   14.522   ~ 49 0
53 2MASX J11481815-0138230 Sy1 11 48 18.153 -01 38 23.05   15.6   15.847   ~ 31 0
54 2dFGRS TGN378Z115 H2G 11 50 23.8586763672 -00 31 41.089748556   18   16.592   ~ 39 0
55 2dFGRS TGN311Z094 H2G 11 50 36.30 -00 34 03.3   15.472   14.895 15.5 ~ 56 0
56 LEDA 37102 Sy1 11 51 33.3537570144 -02 22 21.893502576   17       ~ 167 0
57 Mrk 1307 Sy1 11 52 37.19 -02 28 09.9   14.79   14.09 14.9 ~ 171 0
58 2dFGRS TGN311Z206 Sy1 11 52 47.5102092912 -00 40 07.665791232   18   17.188   ~ 45 0
59 IC 745 AGN 11 54 12.2719925760 +00 08 11.823367524   14.59 14.19     ~ 133 1
60 2dFGRS TGN313Z019 H2G 12 01 30.5289574848 -01 26 09.991251528   18   17.164   ~ 21 0
61 Mrk 1313 Sy1 12 12 14.7430689744 +00 04 20.530354908   17.56 17.40     ~ 77 0
62 UM 487 EmO 12 18 15.4 -00 21 29           ~ 4 0
63 LEDA 39637 AG? 12 19 12.47 -02 47 45.0   18       ~ 12 0
64 2dFGRS TGN385Z034 H2G 12 19 53.199 +01 46 24.13   15.2 14.80 15.213   ~ 48 0
65 LEDA 40263 G 12 23 43.2752843232 +01 18 40.134539844   18   16.909   ~ 17 0
66 LEDA 40357 Sy1 12 24 19.73 +01 05 59.5           ~ 12 0
67 UGC 7531 LSB 12 26 11.817 -01 18 17.11   14.9   14.71   ~ 42 0
68 Mrk 209 bCG 12 26 15.69 +48 29 38.3   15.3       ~ 346 0
69 LEDA 40683 LSB 12 26 22.7 -01 15 13   16.3   16.0 15.9 ~ 31 0
70 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6643 0
71 2dFGRS TGN251Z016 H2G 12 32 23.602 -01 44 24.69   16   15.713   ~ 28 0
72 2dFGRS TGN184Z241 Sy1 12 34 36.2810770536 -02 07 21.473140368   18   17.525   ~ 13 0
73 LEDA 42581 EmG 12 41 36.080 -00 07 06.27   16   15.26   ~ 25 0
74 2dFGRS TGN391Z208 H2G 12 42 00.69339 +00 45 14.0096   17   16.232   ~ 18 0
75 NGC 4670 AG? 12 45 17.150 +27 07 31.76   12.6 12.90     ~ 259 0
76 APG 277 IG 12 54 49.9 +02 38 57           ~ 59 1
77 NGC 4810 GiP 12 54 51.4796706960 +02 38 16.213538760   14.8       ~ 63 1
78 UGC 8105 EmG 12 59 57.748 +02 03 01.09   15.5   14.458   ~ 64 0
79 2dFGRS TGN327Z109 LSB 13 02 40.79 +01 04 26.8   18   16.818   ~ 35 0
80 LEDA 45042 Sy1 13 02 52.1194372680 +00 24 25.151859720   17.78       ~ 15 0
81 LEDA 46044 AG? 13 14 32.600 +02 33 52.82   16       ~ 20 0
82 LEDA 46120 G 13 15 25.7213042208 +00 58 24.315923568   17.303   16.646   ~ 14 0
83 6dFGS gJ131742.7-010005 LSB 13 17 43.1868710184 -01 00 03.820032216   16.0   15.7 16.2 ~ 44 0
84 LEDA 46344 AG? 13 18 18.99 +02 12 44.0           ~ 8 0
85 LEDA 46470 Sy1 13 19 37.2368590968 +00 50 43.992887892   18       ~ 12 0
86 2QZ J132347.5-013252 EmG 13 23 47.4573498792 -01 32 52.048078188           ~ 40 0
87 Z 17-27 EmG 13 34 35.457 -00 21 11.86   15.4       ~ 17 0
88 2dFGRS TGN334Z109 Sy1 13 36 49.5135691248 -00 11 58.896656880   18       ~ 12 0
89 2dFGRS TGN267Z032 Sy1 13 39 51.4703938800 -00 45 10.863418968   16.86 16.41 16.333   ~ 16 0
90 Mrk 67 EmG 13 41 56.4808997304 +30 31 09.652262088   16.5       ~ 94 0
91 2MASS J13415883+0218444 GiC 13 41 58.848 +02 18 44.56   17       ~ 18 0
92 LEDA 48855 H2G 13 46 53.07550 -01 31 39.0566   17.865   17.067   ~ 11 0
93 2dFGRS TGN338Z246 Sy1 13 52 36.861 +00 01 20.98   18       ~ 20 0
94 2MASX J13524450+0007488 LSB 13 52 44.506 +00 07 48.86 15.68 15.78 15.40 15.04 14.71 ~ 30 0
95 2dFGRS TGN271Z061 LSB 14 00 43.066 -00 30 19.14   15.4   15.364   ~ 24 0
96 2MASX J14014643+0109249 Sy1 14 01 46.4859552192 +01 09 24.371461800   16       ~ 18 0
97 2dFGRS TGN273Z122 H2G 14 08 03.0063174768 -01 51 49.213309716   18   16.958   ~ 16 0
98 UM 648 EmO 14 13 35.880 +01 44 10.58   17       ~ 11 0
99 LEDA 50869 G 14 14 27.707 -00 28 08.13   18.357   17.971   ~ 12 0
100 Mrk 829 GiP 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 209 0
101 UGC 9562 GiP 14 51 14.3956253136 +35 32 32.932212324   14.2       ~ 160 0
102 Mrk 487 bCG 15 37 04.237 +55 15 47.60   15.2       ~ 132 0
103 NAME Kinman Dwarf bCG 22 30 36.7959714600 -00 06 36.924915456 16.85 17.35 16.87   16.65 ~ 65 2
104 NGC 7518 GiP 23 13 12.7537321282 +06 19 18.411674658   14.5       ~ 98 0
105 Mrk 324 AG? 23 26 32.783 +18 16 00.07   15.5       ~ 66 0

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