2004MNRAS.349..357B

Query : 2004MNRAS.349..357B

2004MNRAS.349..357B - Mon. Not. R. Astron. Soc., 349, 357-366 (2004/March-3)

Are interactions the primary triggers of star formation in dwarf galaxies ?

BROSCH N., ALMOZNINO E. and HELLER A.B.

Abstract (from CDS):

We investigate the assumption that the trigger of star formation in dwarf galaxies is interactions with other galaxies, in the context of a search for a `primary' trigger of a first generation of stars. This is cosmologically relevant because the galaxy formation process consists not only of the accumulation of gas in a gravitational potential well but also of the triggering of star formation in this gas mass, and also because some high-z potentially primeval galaxy blocks look like nearby star-forming dwarf galaxies. We review theoretical ideas proposed to account for the tidal interaction triggering mechanism and present a series of observational tests of this assumption using published data. We also show results of a search in the vicinity of a composite sample of 96 dwarf late-type galaxies for interaction candidates showing star formation. The small number of possible perturbing galaxies identified in the neighbourhood of our sample galaxies, along with similar findings from other studies, supports the view that tidal interactions may not be relevant as primary triggers of star formation. We conclude that interactions between galaxies may explain some forms of star formation triggering, perhaps in central regions of large galaxies, but they do not seem to be significant for dwarf galaxies and, by inference, for first-time galaxies forming at high redshifts. Intuitive reasoning, based on an analogy with stellar dynamics, shows that conditions for primary star formation triggering may occur in gas masses oscillating in a dark-matter gravitational potential. We propose this mechanism as a plausible primary trigger scenario, which would be worth investigating theoretically.

Abstract Copyright: 2004 RAS

Journal keyword(s): stars: formation - galaxies: dwarf - galaxies: interactions

Simbad objects: 140

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Number of rows : 140
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 Z 434-1 AG? 00 20 05.20 +10 52 48.0   15.6       ~ 87 1
2 Z 409-18 H2G 00 28 26.606 +05 00 15.96   15.3       ~ 33 0
3 MCG+00-02-062 AG? 00 30 04.10 +03 30 47.0   18       ~ 38 0
4 Z 435-14 AG? 00 51 12.2110178784 +12 01 31.222059888 15.72 15.38 15.03 14.86   ~ 47 0
5 Z 410-23 LSB 01 01 25.171 +07 37 33.57   15.7       ~ 84 0
6 Z 436-33 AG? 01 21 18.90 +12 24 43.0 15.36 14.82 14.36 12.87   ~ 112 0
7 6dFGS gJ012646.5-003845 H2G 01 26 46.6028219232 -00 38 46.165233696   17   15.46   ~ 58 0
8 UGC 1175 LSB 01 39 56.45832 +11 05 49.8336   17       ~ 32 0
9 Z 412-24 H2G 01 44 41.3 +04 53 26 15.07 15.50 15.16 14.86 14.58 ~ 106 0
10 LEDA 8377 H2G 02 11 23.38 +02 20 29.7   18       ~ 43 0
11 MCG+00-07-077 EmG 02 40 23.09 +01 13 45.3   16.1   15.6 16.0 ~ 67 0
12 Z 415-15 AG? 02 51 04.57 +04 27 13.9 14.76 15.07 14.70 14.50 14.29 ~ 127 0
13 UGC 2535 AG? 03 06 11.58 +01 35 30.8   18       ~ 13 0
14 UGC 2684 AG? 03 20 23.71 +17 17 45.1   18       ~ 78 0
15 SBSG 0335-052 AGN 03 37 44.06 -05 02 40.2     16.65     ~ 500 1
16 UGC 2984 LSB 04 13 12.403 +13 25 19.10   17       ~ 54 0
17 LEDA 213274 AG? 04 13 14.391 +13 21 09.10   16.0       ~ 17 0
18 UGC 3050 AG? 04 27 30.05 +30 56 50.7   18       ~ 15 0
19 MCG+00-13-014 GiC 04 48 34.50 +00 14 30.0   14.7   13.9 14.4 ~ 68 0
20 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
21 Mrk 5 H2G 06 42 15.53 +75 37 32.6   17.0       ~ 114 0
22 UGC 3672 AG? 07 06 27.336 +30 19 23.61   17       ~ 43 0
23 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
24 LEDA 2790884 QSO 08 25 55.5166210656 +35 32 31.833368556   18.2       ~ 128 1
25 MCG+06-20-014 AG? 08 54 24.240 +34 33 20.69   17       ~ 33 0
26 NGC 2685 Sy2 08 55 34.7027817000 +58 44 03.876540108   13.68 12.70     ~ 459 1
27 UGC 4762 LSB 09 05 36.952 +45 19 20.69   18       ~ 22 0
28 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
29 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
30 LEDA 139255 EmG 10 10 32.8031032776 +22 00 39.740761224           ~ 20 0
31 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 703 1
32 UGC 5716 AG? 10 31 43.26364 +25 18 27.3731   17       ~ 82 0
33 Z 154-31 AG? 10 36 43.1428583040 +31 32 50.189204040   15.6   15.04   ~ 121 0
34 Z 184-6 AG? 10 42 42.787 +34 26 57.39   13.31 13.09 12.84 12.85 ~ 173 0
35 MCG+05-26-046 SBG 11 04 58.298 +29 08 16.54   15.5 15.29     ~ 228 0
36 Z 12-40 EmG 11 36 36.636 +00 49 02.61   15.3   14.518 15.1 ~ 124 0
37 Z 97-159 H2G 11 50 02.7462827640 +15 01 23.396910168   15.4       ~ 92 0
38 LEDA 37102 Sy1 11 51 33.3537570144 -02 22 21.893502576   17       ~ 179 0
39 Z 12-111 Sy1 11 52 37.19 -02 28 09.9   14.79   14.09 14.9 ~ 184 0
40 IC 3017 LIN 12 09 22.8215066592 +13 37 05.391212808           ~ 49 0
41 IC 3018 GiG 12 09 24.957 +13 34 29.06   15.3       ~ 58 0
42 IC 3023 LSB 12 10 01.744 +14 22 00.74   16.0       ~ 89 0
43 2MASX J12102434+1310144 GiC 12 10 24.342 +13 10 14.49           ~ 44 0
44 IC 3028 GiG 12 10 35.7587243880 +11 45 38.948516172   14.9       ~ 73 0
45 MCG+00-31-036 AG? 12 11 03.666 +02 00 24.04   15.852   15.429   ~ 60 1
46 LEDA 39153 AG? 12 15 04.006 +09 45 13.17   16.87       ~ 37 0
47 IC 3063 GiG 12 15 06.819 +12 01 00.29   14.9       ~ 61 0
48 Z 41-77 GiP 12 15 18.322 +05 45 40.28   14.9       ~ 95 0
49 LEDA 39250 GiC 12 15 53.794 +14 01 29.64   18       ~ 45 0
50 LEDA 39255 LSB 12 15 56.249 +09 38 57.28   21       ~ 39 0
51 Z 41-57 GiG 12 16 00.538 +04 39 03.19   14.8       ~ 58 0
52 MCG+05-29-048 GiC 12 16 43.23 +28 43 55.8   17.00 15.49     ~ 56 0
53 LEDA 39351 EmG 12 16 47.8914138432 +08 02 56.127914988   17.56       ~ 36 0
54 IC 3094 GiG 12 16 55.9955201904 +13 37 31.451161656   14.1       ~ 88 0
55 UGC 7307 LSB 12 17 04.235 +10 00 20.02   16.5       ~ 59 0
56 LEDA 39392 AG? 12 17 10.703 +06 25 54.48           ~ 36 0
57 LEDA 39468 LSB 12 17 52.848 +05 01 37.15   15.7       ~ 35 0
58 IC 3120 AG? 12 18 15.234 +13 44 57.00   15.3       ~ 50 0
59 LEDA 39584 LSB 12 18 51.305 +12 35 54.13   16       ~ 39 0
60 Z 42-8 H2G 12 19 09.840 +03 51 23.34   14.5       ~ 168 0
61 LEDA 39632 LSB 12 19 11.274 +12 53 00.76   17       ~ 57 0
62 LEDA 39639 LSB 12 19 13.79 +05 59 09.3   19       ~ 32 0
63 RMB 56 AG? 12 19 14.234 +13 52 56.65   15.5       ~ 65 0
64 Z 42-14 GiG 12 19 22.1244200352 +05 54 37.509552144   14.8       ~ 56 0
65 WBL 392 ClG 12 19.4 +05 56           ~ 4 0
66 LEDA 39670 LSB 12 19 25.883 +13 18 39.23   20       ~ 32 0
67 LEDA 39711 LSB 12 19 45.280 +05 27 21.27           ~ 24 0
68 NGC 4270 GiP 12 19 49.4714861496 +05 27 48.394930572   13.3       ~ 188 0
69 LEDA 39734 LSB 12 19 53.386 +06 39 55.97   19       ~ 52 0
70 RMB 169 GiC 12 20 21.780 +12 11 16.14   17.1 16.30     ~ 55 0
71 LEDA 39806 LSB 12 20 23.393 +13 53 52.25   20       ~ 26 0
72 LEDA 39845 GiC 12 20 40.2711363504 +13 53 22.758646344   17.5       ~ 56 0
73 LEDA 39878 LSB 12 20 57.927 +06 20 21.39           ~ 32 0
74 Z 99-22 bCG 12 21 11.2540900032 +17 38 19.505228028   14.9       ~ 78 0
75 LEDA 39929 AG? 12 21 18.558 +04 04 36.03           ~ 31 0
76 LEDA 39942 LSB 12 21 27.173 +15 01 15.27   21       ~ 40 0
77 IC 783 GiG 12 21 38.7938497416 +15 44 42.338292540   14.60     12.6 ~ 103 1
78 Z 42-46 GiG 12 21 57.792 +02 20 42.22   15.5       ~ 50 0
79 MCG+03-32-011 LSB 12 22 07.449 +15 47 59.28   19       ~ 72 1
80 IC 3224 AG? 12 22 36.0781372728 +12 09 27.638744616   16       ~ 63 0
81 LEDA 40109 LSB 12 22 38.542 +06 00 51.61   17       ~ 40 0
82 Z 42-58 GiG 12 22 41.1481852272 +07 57 01.205409312   15.3       ~ 66 0
83 LEDA 40200 LSB 12 23 16.122 +07 41 14.87           ~ 22 0
84 Z 42-67 AG? 12 23 28.6553682552 +05 48 58.423175856   15.7       ~ 37 0
85 NGC 4344 bCG 12 23 37.4496602016 +17 32 27.247188120   13.34       ~ 120 1
86 Z 42-86 GiG 12 24 39.464 +03 59 43.74   15.3       ~ 64 0
87 LEDA 40414 AG? 12 24 41.313 +03 43 17.35           ~ 37 0
88 LEDA 40469 EmG 12 25 08.6945018352 +04 24 51.775723728   17.28       ~ 32 0
89 Z 14-33 LSB 12 25 40.875 +02 09 33.36   16.706   16.629   ~ 64 0
90 RMB 46 bCG 12 25 47.542 +14 57 07.23   16.02       ~ 65 0
91 Z 42-97 GiG 12 25 52.500 +05 48 36.32   15.2       ~ 86 0
92 LEDA 40674 AG? 12 26 21.559 +06 40 10.80           ~ 33 0
93 LEDA 40779 LSB 12 26 59.156 +14 46 56.45   19       ~ 40 0
94 LEDA 40825 AG? 12 27 15.868 +04 15 48.52   17.0       ~ 35 0
95 LEDA 41090 AG? 12 28 54.951 +09 25 15.97           ~ 38 0
96 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 429 2
97 IC 3412 GiG 12 29 22.647 +09 59 20.49   15.4       ~ 67 0
98 RMB 132 bCG 12 30 48.6089418912 +12 02 42.805457196     16.78   16.44 ~ 102 0
99 IC 3446 GiG 12 31 23.137 +11 29 34.15   15.63       ~ 85 1
100 IC 3453 H2G 12 31 37.742 +14 51 35.23   15.2       ~ 97 0
101 Z 70-155 H2G 12 32 33.5217697464 +09 10 24.875570172   15.4       ~ 85 0
102 IC 3474 H2G 12 32 36.928 +02 39 49.57   15.0       ~ 86 0
103 IC 3475 LSB 12 32 40.985 +12 46 13.94   15.4 13.29   12.37 ~ 114 0
104 LEDA 41619 LSB 12 32 46.767 +07 47 56.53           ~ 38 0
105 LEDA 41631 GiP 12 32 51.3720075000 +02 37 47.052602256   16.35       ~ 26 0
106 LEDA 41647 AG? 12 32 57.624 +04 34 41.35   15.0       ~ 43 0
107 LEDA 41840 LSB 12 34 34.986 +02 34 07.78   15.58       ~ 29 0
108 IC 3522 GiP 12 34 45.576 +15 13 14.80   17       ~ 104 0
109 Z 70-196 GiG 12 37 41.52083 +08 33 30.9308   15.1       ~ 126 0
110 LEDA 42204 EmG 12 38 06.8792917776 +10 09 56.059792560   16.79       ~ 44 0
111 IC 3602 GiG 12 38 07.097 +10 04 57.22   15.5       ~ 86 0
112 LEDA 42218 G 12 38 15.5 +06 59 39           ~ 34 0
113 LEDA 42219 LSB 12 38 15.803 +14 52 22.64   21       ~ 37 0
114 LEDA 42325 LSB 12 39 14.18 +15 37 38.0   21       ~ 28 0
115 IC 3617 rG 12 39 24.650 +07 57 53.18   14.8       ~ 125 0
116 LEDA 42378 AG? 12 39 40.140 +09 23 55.77   16       ~ 40 0
117 LEDA 42406 LSB 12 39 58.215 +13 47 01.93   16       ~ 46 0
118 LEDA 42422 AG? 12 40 10.405 +06 50 48.65   17       ~ 41 0
119 LEDA 42768 LSB 12 43 07.4982888312 +07 39 16.422815376   18       ~ 55 0
120 NGC 4641 GiG 12 43 07.657 +12 03 03.99   14.9       ~ 93 0
121 IC 3710 LSB 12 44 09.717 +12 06 51.05   16.5       ~ 93 0
122 IC 3716 GiG 12 44 47.5047072840 +08 06 24.623603568   15.5       ~ 46 0
123 Z 71-33 GiG 12 46 04.442 +08 28 35.11   15.2       ~ 66 0
124 LEDA 43056 LSB 12 46 08.052 +10 09 45.93   16       ~ 50 0
125 LEDA 43072 LSB 12 46 15.297 +10 12 20.14   16       ~ 80 0
126 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
127 Z 71-87 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 475 0
128 UGCA 357 AG? 13 26 13.800 +37 46 14.67   17       ~ 27 0
129 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
130 Z 163-86 bCG 14 36 08.833 +28 26 58.98   15.4       ~ 53 0
131 Mrk 475 AGN 14 39 05.4743306976 +36 48 21.838203540   17.0       ~ 109 0
132 UGC 9762 AG? 15 11 41.134 +32 38 34.56   17       ~ 30 1
133 LEDA 2004197 AG? 15 11 56.7228525264 +32 35 53.096381016           ~ 16 1
134 Z 366-29 G 16 07 29.6625501960 +81 18 06.404922792   15.0       ~ 19 0
135 [BH98] 16110+1720 GiC 16 13 15.2 +17 12 25           ~ 2 0
136 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
137 NGC 7077 AG? 21 29 59.634 +02 24 51.75 14.05 14.25 13.67 13.23 12.86 ~ 106 0
138 MCG+02-55-015 LSB 21 49 28.40 +14 13 52.0   17       ~ 73 0
139 Mrk 324 AG? 23 26 32.783 +18 16 00.07   15.5       ~ 66 0
140 Z 497-42 bCG 23 37 39.543 +30 07 45.93   15.50       ~ 64 0

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