2003A&A...405...31B

Query : 2003A&A...405...31B

2003A&A...405...31B - Astronomy and Astrophysics, volume 40531-52 (2003/7-1)

Galaxy interactions - poor starburst triggers. III. A study of a complete sample of interacting galaxies.

BERGVALL N., LAURIKAINEN E. and AALTO S.

Abstract (from CDS):

We report on a study of tidally triggered star formation in galaxies based on spectroscopic/photometric observations in the optical/near-IR of a magnitude limited sample of 59 systems of interacting and merging galaxies and a comparison sample of 38 normal isolated galaxies. From a statistical point of view the sample gives us a unique opportunity to trace the effects of tidally induced star formation. In contrast to results from previous investigations, our global UBV colours do not support a significant enhancement of starforming activity in the interacting/merging galaxies. We also show that, contrary to previous claims, there is no significantly increased scatter in the colours of Arp galaxies as compared to normal galaxies. We do find support for moderate (a factor of ∼2-3) increase in star formation in the very centres of the interacting galaxies of our sample, contributing marginally to the total luminosity. The interacting and in particular the merging galaxies are characterized by increased far infrared (hereafter FIR) luminosities and temperatures that weakly correlate with the central activity. The LFIR/LB ratio however, is remarkably similar in the two samples, indicating that true starbursts normally are not hiding in the central regions of the FIR luminous cases. The gas mass-to-luminosity ratio in optical-IR is practically independent of luminosity, lending further support to the paucity of true massive starburst galaxies triggered by interactions/mergers. We estimate the frequency of such cases to be of the order of ∼0.1% of the galaxies in an apparent magnitude limited sample. Our conclusion is that interacting and merging galaxies, from the global star formation aspect, generally do not differ dramatically from scaled up versions of normal, isolated galaxies. No drastic change with redshift is expected. One consequence is that galaxy formation probably continued over a long period of time and did not peak at a specific redshift. The effects of massive starbursts, like blowouts caused by superwinds and cosmic reionization caused by starburst populations would also be less important than what is normally assumed.

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Journal keyword(s): galaxies: interactions - galaxies: evolution - galaxies: starburst - galaxies: halos - galaxies: stellar content

Simbad objects: 98

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Number of rows : 98
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 ESO 193-9 AG? 00 00 53.2655486544 -47 21 24.344710848   15.18   13.82   ~ 23 0
2 ESO 193-19 G 00 05 29.0356542216 -50 16 13.050089220   14.24   13.13   ~ 31 0
3 NGC 98 EmG 00 22 49.5591226080 -45 16 08.606637120   13.59   12.31 12.8 ~ 41 0
4 ESO 112-8 EmG 00 33 20.48 -61 17 41.3   16.13   15.34   ~ 12 0
5 ESO 79-13 IG 00 56 51.3318681576 -63 28 51.566562840   15.05   13.89   ~ 26 0
6 NGC 322 EmG 00 57 10.0247043192 -43 43 37.416726408   14.29   13.72   ~ 25 0
7 ESO 79-16 H2G 01 04 26.993 -64 07 11.73   14.35   13.17   ~ 33 0
8 NGC 454 PaG 01 14 22.93 -55 23 55.4   14.26       ~ 56 1
9 NGC 454E Sy2 01 14 24.9356626320 -55 23 49.309036656   13.13 13.58 11.93   ~ 96 0
10 ESO 244-12 PaG 01 18 08.31 -44 27 43.4           ~ 88 1
11 MCG-07-03-014 Sy1 01 18 08.370 -44 27 43.29   14.43   13.06   ~ 86 0
12 MCG-07-03-018 Sy1 01 20 19.6852942584 -44 07 42.896757504   14.59 14.75 13.07   ~ 47 0
13 ESO 151-43 AG? 01 23 29.966 -56 41 14.75   15.00   14.13   ~ 17 0
14 MCG-07-04-010 Sy2 01 29 51.237 -42 19 35.33   14.81   13.82   ~ 54 0
15 NGC 633 EmG 01 36 23.418 -37 19 17.64   13.50   12.50   ~ 101 1
16 NGC 646 IG 01 37 23.63 -64 53 44.9   14.37       ~ 25 0
17 ESO 244-46 GiP 01 39 02.88 -43 22 02.8   15.15   13.57   ~ 11 0
18 MCG-07-05-002 Sy2 01 56 44.4821784144 -43 58 21.683413452   14.32   13.02 13.9 ~ 49 0
19 ESO 153-1 GiG 01 57 25.683 -55 08 20.59   14.96   13.64   ~ 22 0
20 ESO 114-16 G 01 57 51.9068688432 -61 12 51.427277604   13.89   12.43   ~ 28 0
21 NGC 813 G 02 01 36.0277230504 -68 26 21.178164084   13.84   12.39   ~ 29 0
22 ESO 197-18 EmG 02 02 30.8260924416 -50 55 53.816872188   13.47 12.6 12.10   ~ 35 0
23 NGC 889 EmG 02 19 06.9485102808 -41 44 57.783256404   14.36   12.82   ~ 22 0
24 ESO 153-33 Sy2 02 25 06.8867223432 -54 46 43.254858864   15.33   13.89   ~ 24 0
25 MCG-07-06-002 GiP 02 25 14.183 -40 25 26.85   14.40   13.67   ~ 28 0
26 NGC 986 Sy1 02 33 34.3087856832 -39 02 42.128176704 11.72 11.74 10.91 10.10 11.3 ~ 192 2
27 ESO 199-1 Sy2 02 49 03.0612292296 -49 56 20.993830224   14.68   13.41   ~ 25 0
28 MCG-07-06-019 Sy2 02 49 33.9166267536 -38 46 11.166649716   14.21   12.52   ~ 48 1
29 NGC 1356 IG 03 30 40.8063239400 -50 18 34.597168632   14.05   12.81   ~ 36 0
30 IC 1954 GiG 03 31 31.393 -51 54 17.54   12.14   11.15 11.8 ~ 149 0
31 NGC 1487 GiP 03 55 46.5 -42 22 01   12.28 11.68 11.74 11.02 ~ 124 0
32 ESO 117-16 Sy2 03 56 47.9107335072 -60 25 36.358253544   15.15   14.03   ~ 15 0
33 NGC 1494 GiG 03 57 42.567 -48 54 40.90   12.34   11.46 12.3 ~ 91 0
34 ESO 15-5 Sy1 03 58 31.5597514248 -81 03 46.623994308   13.38   11.94 12.3 ~ 35 0
35 NGC 1536 EmG 04 10 59.838 -56 28 49.64   13.29 13.15 12.19   ~ 88 0
36 NGC 1574 GiG 04 21 58.7445118536 -56 58 28.407111240   11.17 10.48 9.73   ~ 136 0
37 NGC 1572 Sy2 04 22 42.814 -40 36 03.50   13.63   12.05   ~ 77 0
38 IC 2068 EmG 04 26 36.8560817808 -42 05 37.510112616   14.29   12.88   ~ 32 0
39 ESO 157-50 AG? 04 40 44.015 -52 45 29.87   14.83   14.32 14.7 ~ 31 0
40 MCG-07-10-022 AG? 04 45 07.5613824912 -41 34 43.515740604   14.71   13.43   ~ 20 0
41 ESO 85-5 AG? 04 48 15.44 -63 27 47.5   14.64   13.55   ~ 16 0
42 ESO 306-12 G 05 37 19.4408489808 -42 24 34.166622348   14.98       ~ 21 0
43 NGC 2101 AG? 05 46 24.17 -52 05 18.7   13.68   12.70 14.0 ~ 67 0
44 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
45 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
46 ESO 105-12 GiG 19 46 44.5371650952 -65 14 48.988702572   14.89   13.50   ~ 25 0
47 NGC 6851 EmG 20 03 34.3587786984 -48 17 04.350059196   12.83 11.67 11.31   ~ 96 0
48 ESO 143-4 GiP 20 04 46.0926416136 -57 40 47.658479556   15.19   13.84   ~ 22 0
49 ESO 105-26 EmG 20 09 27.319 -66 12 55.77   15.90       ~ 20 0
50 NGC 6875 EmG 20 13 12.5017892736 -46 09 41.636505744   12.90 11.78 11.41   ~ 65 0
51 MCG-07-41-019 Sy2 20 16 18.0237652608 -44 17 59.593412832   13.71 12.47 12.18   ~ 30 0
52 ESO 284-45 Sy1 20 16 48.6838587480 -46 31 55.563974940   13.86 13.18 12.24   ~ 31 0
53 NGC 6872 AG? 20 16 56.4025198800 -70 46 05.070595584   11.97 11.59 10.71 11.9 ~ 92 0
54 ESO 284-48 EmG 20 17 16.435 -45 47 04.25   14.27   13.25   ~ 16 0
55 NGC 6889 AG? 20 18 53.1714698616 -53 57 25.265567016   13.70   12.61 13.4 ~ 41 0
56 MCG-07-41-030 AG? 20 19 41.682 -39 17 18.96   13.19 13.47 12.60 13.4 ~ 50 0
57 NGC 6902A G 20 23 00.3645739896 -44 16 13.582984044   14.42   13.09   ~ 27 0
58 MCG-07-42-005 G 20 26 05.7 -40 55 51   13.78 13.45 12.83   ~ 8 0
59 ESO 285-13 Sy1 20 27 42.2151585168 -43 43 52.354325640   14.57   13.34   ~ 24 0
60 ESO 285-35 Sy2 20 34 38.708 -43 50 25.13   14.86 14.29 13.63   ~ 22 0
61 IC 5023 EmG 20 38 10.7929623648 -67 11 04.611014232   14.20   12.91   ~ 33 0
62 MCG-06-45-009 AG? 20 41 13.872 -38 11 36.38   13.40 12.75 12.35   ~ 51 0
63 NGC 6920 Sy2 20 43 57.4877734861 -80 00 03.198389411   13.08   11.27 12.0 ~ 53 0
64 ESO 187-13 IG 20 44 48.8 -52 49 11   15.42   14.34   ~ 10 0
65 ESO 286-19 LIN 20 58 26.8183783008 -42 38 59.411838156   14.79 14.79 14.20   ~ 318 0
66 ESO 235-23 IG 20 58 31.5 -49 16 47   12.8       ~ 16 0
67 LEDA 65819 Sy2 20 58 31.8248104104 -49 16 43.633025364   14.25   12.73   ~ 26 0
68 IC 5071 EmG 21 01 19.7460489744 -72 38 34.048973436   13.28   12.14 12.6 ~ 53 0
69 MCG-07-43-012 AG? 21 03 33.40 -39 26 47.4   13.74   13.00 13.5 ~ 39 0
70 MCG-06-46-010 EmG 21 10 00.4576081505 -37 30 14.389476106   13.78   12.88 13.3 ~ 56 0
71 NGC 7032 EmG 21 15 22.8760564488 -68 17 16.417849740   13.62   12.88   ~ 24 0
72 NGC 7049 GiP 21 19 00.2856324192 -48 33 43.713475092   11.28 10.74 9.77   ~ 150 1
73 NGC 7057 Sy2 21 24 58.7084688456 -42 27 37.518181416   13.65   12.29   ~ 42 0
74 ESO 287-21 AG? 21 25 41.34 -43 44 29.6   15.18       ~ 13 0
75 IC 5110 EmG 21 30 43.3651588104 -60 00 06.718236876   14.26 12.83 12.89   ~ 26 0
76 IC 5108 G 21 32 51.5027973600 -72 39 34.885361988   15.12   14.25   ~ 16 0
77 ESO 287-40 GiG 21 37 28.1844944568 -47 02 08.827431612   14.29   13.01   ~ 41 0
78 2MASX J21430132-5240599 GiP 21 43 01.326 -52 40 59.96   15.20 13.26 13.86   ~ 17 0
79 LEDA 67230 EmG 21 43 06.5396359152 -52 41 25.273716720   14.63   13.59   ~ 17 0
80 ESO 145-21 PaG 21 51 12.7 -61 12 01     13.41     ~ 8 0
81 MCG-07-45-007 EmG 22 01 37.7976008112 -42 26 21.883861932   14.95       ~ 18 0
82 ESO 108-18 IG 22 12 17.043 -62 43 29.86   14.82 13.91 13.98   ~ 26 0
83 IC 5174 Sy2 22 12 44.6806615892 -38 10 17.175031132   14.63       ~ 35 0
84 ESO 108-21 Sy1 22 15 16.699 -65 33 02.46   13.47   12.27 12.9 ~ 37 0
85 ESO 27-14 GiG 22 36 11.191 -81 03 53.65   13.84   12.60 13.6 ~ 27 0
86 IC 5244 EmG 22 44 13.7267693712 -64 02 35.996586216   13.68   12.10 12.6 ~ 44 0
87 NGC 7368 EmG 22 45 31.7087508048 -39 20 30.567269760   13.16   11.38 12.6 ~ 75 1
88 IC 5250 IG 22 47 19.8 -65 03 27   12.1 11.11     ~ 29 0
89 NGC 7476 AG? 23 05 11.873 -43 05 57.74   13.57   12.54 13.2 ~ 43 0
90 ESO 240-1 G 23 21 51.4926936264 -47 56 14.112952440   15.12   13.97   ~ 23 0
91 NGC 7650 Sy2 23 25 21.460 -57 47 28.78   13.44   12.63 13.0 ~ 38 0
92 ESO 240-10 Sy1 23 37 44.4046340640 -47 30 22.668150492   12.49   11.15   ~ 58 0
93 ESO 240-12 EmG 23 38 49.6480565352 -51 51 35.363762280   14.35   13.64 14.1 ~ 39 0
94 NGC 7733 Sy2 23 42 32.9492839464 -65 57 23.583879396   14.49   13.35   ~ 47 1
95 NGC 7734 Sy2 23 42 42.9369031704 -65 56 40.927089876   13.95   12.56   ~ 37 1
96 NGC 7764 EmG 23 50 53.980 -40 43 41.49   12.97 12.30 11.85 12.8 ~ 68 0
97 ESO 293-11 IG 23 54 50.9363679192 -38 57 06.829783272   16.21   14.68   ~ 11 0
98 MCG-07-01-002 Sy1 23 58 01.0898917824 -41 31 54.911677260   14.74       ~ 21 0

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