2006A&A...457..425C

Query : 2006A&A...457..425C

2006A&A...457..425C - Astronomy and Astrophysics, volume 457425-435 (2006/10-2)

Optical spectroscopy for a sample of southern binary galaxies.

COUTO DA SILVA T.C. and DE SOUZA R.E.

Abstract (from CDS):

This work is part of a joint observational program aiming to get photometric and spectroscopic information on southern pairs of galaxies. We present optical long-slit spectroscopic data on 80 probable components of pairs, 61 of them collected with a spectral resolution of 3.4Å, and 19 with 12Å. Nevertheless, our analysis takes into account 53 components of pairs with better spectral resolution, as 8 of these target galaxies actually belong to optical pairs. For the sample with better resolution, the covered wavelength range is 5724≤λ≤7036Å. The spectroscopic and photometric information is gathered for an analysis relating galaxy morphologies to their spectra. We use Hα+[NII] and Hα equivalent widths as star formation tracers for the central region of our sample galaxies, and we classify the spectra according to the emission lines' relative strength by looking at their behavior. Some of our sample galaxies exhibit high central star formation, most of them belonging to close pairs. However, not all galaxies' components of close pairs show this behavior. This may be a clue that besides interaction, other agents can stimulate central emission in binary galaxies. We suggest an enhancement in the number of galaxies with peculiar spectra (probably Seyferts) in our binary sample, when compared to isolated galaxies. Our data indicates that the morphological types of interacting galaxies are related to their spectral characteristics, as almost all early-type galaxies of our sample do not exhibit central optical emission. We note that the star formation activity is most likely to take place in both pairs' components, with a slightly higher mean strength for the less bright component of the pair. It is interesting to point out that most spirals exhibiting a strong HII emission line spectra present either a bar or a peculiarity, but on a general basis we do not find an enhancement of star formation in our interaction sample.

Abstract Copyright: ∼

Journal keyword(s): galaxies: interactions

CDS comments: Paragraph 4 ESO 228-G30 is a probable misprint for ESO 288-30.

Simbad objects: 82

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Number of rows : 82
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 IC 1561 EmG 00 38 32.488 -24 20 23.76   14.92   13.95   ~ 27 0
2 IC 1562 Sy1 00 38 33.9645345648 -24 16 26.319181764   13.56   12.53 12.9 ~ 56 0
3 NGC 348 EmG 01 00 51.9721973856 -53 14 40.084432188   14.58   13.48   ~ 18 0
4 ESO 151-18 GiG 01 01 35.6728529904 -53 12 01.735541568   14.80   13.33   ~ 19 0
5 IC 1617 GiG 01 04 16.8078256296 -51 01 58.291643820   14.59   13.22   ~ 24 0
6 MCG-05-04-042 LIN 01 31 13.9934687760 -26 51 34.343553348   14.49   13.03   ~ 25 0
7 ESO 52-20 GiP 02 05 43.021 -71 06 56.24   14.58   13.47   ~ 19 0
8 ESO 52-21 GiP 02 05 56.9441126064 -71 07 45.824554992   14.97   13.91   ~ 13 0
9 IC 1811 EmG 02 30 38.1828358896 -34 15 51.126072876   14.35   13.07   ~ 22 0
10 IC 1813 rG 02 30 49.4689315296 -34 13 15.086526924   14.20   12.80   ~ 30 0
11 MCG-06-07-014 Sy2 02 57 49.1645750592 -36 43 04.585633536   13.30   12.00 12.7 ~ 47 0
12 [SDD95] 139b GiP 02 58 54.75 -36 36 40.7   14.83   13.79   ~ 3 0
13 MCG-05-09-008 EmG 03 29 55.7420523888 -28 46 03.788021028   14.94   13.36   ~ 31 0
14 MCG-05-09-009 G 03 29 56.8453705248 -28 46 29.607028680   14.09   12.60   ~ 24 1
15 MCG-03-10-051 Sy2 03 53 53.5221350472 -17 35 36.816089964   14.92   13.55   ~ 24 0
16 NGC 1529 GiG 04 07 19.8961006320 -62 53 57.619933332   14.39   12.92   ~ 27 0
17 NGC 1534 GiG 04 08 46.0768124832 -62 47 51.554038632   13.76   12.23   ~ 31 0
18 NGC 1540W GiG 04 15 09.66 -28 28 55.6   14.75   14.26   ~ 10 1
19 NGC 1540A GiG 04 15 10.282 -28 28 41.73   14.75   14.26   ~ 11 0
20 NGC 1540 IG 04 15 10.35 -28 29 03.6           ~ 19 0
21 NGC 1540S Sy1 04 15 10.6638340320 -28 29 18.101713020   14.94   14.12   ~ 13 0
22 NGC 1680 AG? 04 48 34.0149169416 -47 48 59.146563996   14.45   13.30   ~ 26 0
23 ESO 203-7 GiP 04 50 52.7311631232 -47 46 05.770153020   14.31   13.10   ~ 15 0
24 MCG-04-12-023 GiG 04 58 09.0781208808 -21 37 08.424530292   14.39   13.25   ~ 18 0
25 ESO 119-46 GiG 05 14 29.5959779376 -62 10 14.726735508   15.04   13.65   ~ 32 0
26 ESO 486-38 Sy1 05 15 13.8329939376 -22 33 00.810596700   14.59   13.14   ~ 22 0
27 LEDA 16986 G 05 15 21.0 -26 28 04   14.07   13.53   ~ 6 0
28 ESO 362-17 Sy2 05 19 27.079 -32 45 28.96   15.38   14.25   ~ 15 0
29 MCG-06-12-021 EmG 05 23 00.4800532920 -38 52 13.240178616   14.56   13.89   ~ 15 0
30 ESO-LV 306-0011 GiP 05 28 03.0 -39 34 37   15.37   13.95   ~ 2 0
31 ESO 306-3 EmG 05 29 07.2222834480 -39 25 20.071555176   14.44   13.29   ~ 24 0
32 MCG-04-31-005 Sy1 12 55 35.6914004112 -26 49 30.158962932   12.84   11.28 12.35 ~ 50 0
33 MCG-04-31-006 GiP 12 55 44.1064176624 -26 48 33.963737328   13.96   12.64   ~ 37 0
34 ESO 443-50 GiP 13 04 22.6145174208 -28 42 01.829932740   14.49   13.07 13.46 ~ 16 0
35 ESO 444-10 Sy2 13 20 27.6088067664 -30 54 30.881181204   15.43   14.34 14.65 ~ 31 0
36 LEDA 46553 Sy2 13 20 29.484 -30 53 46.84   14.33   13.08 13.71 ~ 20 0
37 MCG-04-32-052 EmG 13 43 51.1179582600 -27 21 42.912769536   15.13   14.08 14.47 ~ 22 0
38 IC 4320 EmG 13 44 03.7109865240 -27 13 54.033092616   14.25   12.70 13.07 ~ 47 0
39 MCG-04-33-039 EmG 14 04 37.3751586816 -24 49 59.303514360   14.06   12.90 13.01 ~ 43 0
40 MCG-04-34-002 GiP 14 17 39.4216630608 -24 11 00.637148148   14.51   13.48   ~ 25 0
41 MCG-03-38-019 EmG 14 50 36.453 -18 09 04.19   14.32   13.27 13.7 ~ 67 0
42 MCG-03-38-020 EmG 14 50 58.4373519120 -18 28 19.129593972   13.79   12.47   ~ 22 0
43 IC 4935 Sy2 20 04 34.1209839984 -57 35 53.423304108   14.04   12.43   ~ 32 0
44 ESO 143-4 GiP 20 04 46.0926416136 -57 40 47.658479556   15.19   13.84   ~ 22 0
45 ESO 340-14 Sy1 20 19 14.8748491992 -41 20 34.909730232   14.74   14.48   ~ 7 0
46 MCG-07-41-028 Sy2 20 19 26.5395882984 -41 19 57.044485524   13.59   12.25   ~ 18 0
47 IC 5020 EmG 20 30 38.4665239896 -33 29 08.181102084   12.95 12.72 11.74 12.4 ~ 50 0
48 MCG-05-48-024 EmG 20 37 32.1987151656 -27 34 36.038564544   14.43   13.07   ~ 23 0
49 MCG-05-48-025 GiP 20 37 36.9082395768 -27 33 58.984376148   15.14   13.82   ~ 16 0
50 NGC 6935 EmG 20 38 20.1988150992 -52 06 37.891816812   12.77 12.10 11.57   ~ 72 0
51 NGC 6937 GiP 20 38 45.853 -52 08 35.69   13.37 13.81 12.32 12.8 ~ 40 0
52 IC 5038 EmG 20 46 51.5968400016 -65 01 00.371861580   14.22   12.89   ~ 37 0
53 IC 5042 Sy2 20 47 46.0032762912 -65 05 03.217048620   14.06   12.93   ~ 24 0
54 IC 5063 Bla 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 710 1
55 IC 5064 Sy2 20 52 38.2952650728 -57 13 56.725002516   14.31   12.76   ~ 36 0
56 MCG-07-43-006 Sy2 20 57 49.4397976872 -43 21 05.656391676   14.49   13.16   ~ 24 0
57 MCG-07-43-005 GiP 20 57 50.3434558560 -43 22 28.058494764   14.30   12.77 13.2 ~ 55 0
58 MCG-06-46-011 EmG 21 12 56.2202094048 -37 52 10.155902304   14.60   13.68   ~ 23 1
59 MCG-06-46-012 EmG 21 13 02.4817341360 -37 53 14.843748012   15.31   14.47   ~ 10 0
60 IC 5100 EmG 21 21 43.5195118104 -65 56 00.352228452   14.61   13.75 14.3 ~ 33 0
61 IC 5101 EmG 21 21 55.8030758640 -65 50 10.221842040   14.04   12.95   ~ 27 0
62 NGC 7125 EmG 21 49 15.945 -60 42 47.42   12.70 12.37 11.77   ~ 70 0
63 NGC 7126 Sy2 21 49 18.1342577688 -60 36 32.990119740   12.99 12.36 11.81   ~ 74 0
64 ESO 48-11 EmG 21 52 35.0339132208 -73 17 48.181799256   14.72       ~ 15 0
65 ESO 48-12 GiP 21 52 48.3045738696 -73 17 39.086746620   16.25   14.76   ~ 19 0
66 MCG-05-51-029 EmG 21 58 10.4350360920 -27 23 31.699749912   13.84 11.95 12.74   ~ 32 1
67 IC 5149 GiP 21 58 59.055 -27 24 50.15   14.50   13.26   ~ 40 0
68 MCG-07-45-006 EmG 22 01 32.6548620240 -42 27 18.386857296   14.71       ~ 19 0
69 MCG-07-45-007 EmG 22 01 37.7976008112 -42 26 21.883861932   14.95       ~ 18 0
70 MCG-06-48-026 Sy1 22 11 41.7976141536 -33 53 09.299183352   14.27   13.17   ~ 27 0
71 IC 5210 GiP 22 22 31.1080443072 -18 52 10.961404284   14.01   12.49   ~ 25 0
72 MCG-04-52-040 GiP 22 22 32.4948003864 -23 31 27.889158000   14.74   13.45   ~ 22 0
73 MCG-04-52-041 GiP 22 22 33.3122568168 -23 30 53.844757920   14.32   13.00   ~ 23 0
74 IC 5211 GiP 22 22 43.0473168048 -18 52 48.598296132   14.66   13.12   ~ 24 0
75 NGC 7284 EmG 22 28 35.9222830920 -24 50 39.077854512   12.96   11.59   ~ 48 0
76 NGC 7285 AG? 22 28 38.00 -24 50 26.8   12.82   11.54   ~ 39 0
77 ESO 76-30 GiP 22 55 25.4158436232 -70 37 55.781999868   14.20   12.82   ~ 21 0
78 ESO 76-31 EmG 22 55 56.8958081712 -70 34 25.357060776   13.96   12.51   ~ 22 0
79 NGC 7636 EmG 23 22 32.9715526584 -29 16 50.347609716   14.70   13.23   ~ 19 0
80 MCG-05-56-031 GiP 23 52 31.8562901376 -30 10 51.540718656   14.33   13.20   ~ 20 0
81 ESO 111-9 Sy2 23 55 55.2742607184 -60 40 54.436342404   14.65   13.47   ~ 37 0
82 ESO 111-10 GiP 23 56 06.8354346096 -60 40 16.466802456   14.18   12.87   ~ 35 0

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