2008A&A...484..655F


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.30CEST19:03:47

2008A&A...484..655F - Astronomy and Astrophysics, volume 484, 655-670 (2008/6-4)

Nuclear activity in galaxy pairs: a spectroscopic analysis of 48 UZC-BGPs.

FOCARDI P., ZITELLI V. and MARINONI S.

Abstract (from CDS):

The role played by interaction on galaxy formation and evolution continues to be debated. Several questions remain open, among them whether, and to what extent, galaxy interaction induce nuclear activity, as theoretical predictions, so far, have not been adequately supported by observations. Part of the uncertainty affecting the observational results is likely to be due to the limited sizes and the inhomogeneity of the samples. Galaxy pairs are ideal sites in which to investigate the role of interaction on nuclear activity, since the proximity, in redshift and in projected separation, between members make interaction and encounters highly probable. For this reason we have undertaken a spectroscopic survey of a large homogeneous sample of galaxy pairs (UZC-BGP) selected applying an objective neighbour search algorithm to a 3D galaxy catalog (UZC). We present the results of the nuclear spectral classification, performed using standard diagnostic diagrams, of 48 UZC-BGPs, which represents more than half of the whole sample and has an excellent morphological match with it. The fraction of emission line galaxies in our pair sample is large, especially among spirals where it reaches 84% and 95%, for early and late spirals. Star Burst (SB) is the most frequent type of nuclear activity encountered (30% of galaxies), while AGNs (Active Galactic Nuclei) make only 19%. The fractions increase to 45% and 22% when considering only spirals. Late spirals are characterized by both an unusual increase (35%) of AGN activity and high luminosity (44% have MB←20.0+5logh). LLAGNs (Low Luminosity AGNs) are only 8% of the total number of galaxies, but this kind of activity could be present in another 10% of the galaxies (LLAGN candidates). If confirmed, these candidates would make LLAGNs constitute a significant fraction of the whole AGN (LLAGN + AGN) population, and raise the AGN population as a whole to 37%. Absorption line galaxies reside mostly (61%) in S0 galaxies and display the lowest B luminosity in the sample; only 18% of them have MB←20+5logh, but together with LLAGNs (candidates included) they are the most massive galaxies in the sample. Intense-SB nuclei are found in galaxy pairs with galaxy-galaxy projected separation of up to 160h–1kpc suggesting that in bright isolated galaxy pairs interaction may be at work and effective up to that distance. AGNs are characterized by an advanced morphological type while the SB phenomenon occurs with the same frequency in early and late spirals. Whether and how these unusual characteristics relate to the pair environment needs to be further investigated. LLAGNs and LLAGN candidates do not always show similar properties; the former are more luminous in B, richer in early-type (E-S0s) galaxies, and half of them are hosted in galaxies showing visible signs of interaction with fainter companions. This last finding suggests that minor interactions might be a driving mechanism for a fraction of LLAGNs. The differences between LLAGNs and LLAGN candidates might confirm the heterogeneous nature of this class of objects.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: interactions

Simbad objects: 102

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Number of rows : 102

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 23 G 00 09 53.411 +25 55 25.46   12.5       ~ 286 3
2 NGC 26 GiP 00 10 25.8798210531 +25 49 54.904854088   13.9       ~ 78 2
3 NGC 41 GiG 00 12 47.952 +22 01 23.96   14.6       ~ 30 0
4 NGC 42 GiG 00 12 56.361 +22 06 01.00   15.0       ~ 15 0
5 NGC 160 G 00 36 04.0981265430 +23 57 28.510460638   13.7       ~ 80 0
6 NGC 169 SyG 00 36 51.611 +23 59 27.37   13.70 13.1     ~ 105 0
7 IC 1559 AGN 00 36 52.2 +23 59 06   14       ~ 22 0
8 NGC 192 rG 00 39 13.391 +00 51 50.89   13.9   11.97   ~ 111 0
9 NGC 196 GiG 00 39 17.8427720767 +00 54 45.973336715   14.2   12.40   ~ 74 0
10 NGC 197 GiP 00 39 18.7988868085 +00 53 31.178332032   14.85   13.39   ~ 52 0
11 NGC 800 GiP 02 02 11.8409596928 -00 07 49.519900278   14.7       ~ 32 0
12 NGC 799 LIN 02 02 12.299 -00 06 02.58   14.2       ~ 57 0
13 NGC 871 GiG 02 17 10.734 +14 32 52.10   14.20 13.61     ~ 61 1
14 NGC 876 GiG 02 17 53.327 +14 31 17.91   16.5       ~ 54 0
15 NGC 877 LSB 02 17 59.6455492183 +14 32 38.205097954   12.5       ~ 160 1
16 NGC 997 GiG 02 37 14.480 +07 18 20.13   14.6       ~ 23 0
17 NGC 998 GiG 02 37 16.5089066649 +07 20 08.716893538   14.6       ~ 13 0
18 Mrk 1076 GiP 03 19 43.0391224711 +00 33 55.729212645   15.6       ~ 28 0
19 MCG+00-09-058 LIN 03 19 47.0199109569 +00 35 04.440044747   14.9       ~ 19 0
20 NGC 1587 GiP 04 30 39.921 +00 39 42.16   13.3       ~ 128 0
21 NGC 1588 GiP 04 30 43.86 +00 39 52.8   14.1       ~ 78 0
22 NGC 1589 GiG 04 30 45.4359751199 +00 51 49.225616468   13.8       ~ 59 0
23 UGC 4074 GiG 07 54 18.3713921696 +54 15 19.573380158   13.8       ~ 18 0
24 MCG+09-13-088 G 07 54 54.031 +54 07 14.17   15.1       ~ 8 0
25 NGC 2528 rG 08 07 24.877 +39 11 40.23   13.5       ~ 38 0
26 NGC 2524 LIN 08 08 09.562 +39 09 26.63   13.7       ~ 26 0
27 NGC 2744 GiG 09 04 39.020 +18 27 52.14   13.7       ~ 48 0
28 NGC 2749 GiG 09 05 21.313 +18 18 47.25   13.3       ~ 83 0
29 NGC 2751 LIN 09 05 32.3968921708 +18 15 44.233754030   15.1       ~ 16 0
30 NGC 2872 IG 09 25 42.539 +11 25 55.70   13.0       ~ 79 0
31 NGC 2874 LIN 09 25 47.344 +11 25 28.19   13.5       ~ 54 0
32 NVSS J093929+062610 rG 09 39 30.176 +06 26 13.37   15.2       ~ 9 0
33 2MASX J09393527+0624513 G 09 39 35.2546537724 +06 24 51.881336093   15.3       ~ 14 0
34 NGC 2988 GiP 09 46 47.967 +22 00 43.58   14.3       ~ 11 0
35 NGC 2991 GiP 09 46 50.112 +22 00 50.44   14.3       ~ 28 0
36 NGC 2994 LIN 09 47 16.1112282685 +22 05 22.132653162   14.4       ~ 27 0
37 Mrk 1425 H2G 09 47 58.4324759878 +54 00 52.685293663   14.0       ~ 37 0
38 MCG+09-16-053 G 09 48 22.822 +54 00 27.89   15.4       ~ 7 0
39 MCG+00-26-016 LIN 10 05 24.093 +00 32 38.08   15.0   13.882   ~ 18 0
40 IC 590 rG 10 05 49.834 +00 38 00.14   14.2       ~ 36 0
41 2MASX J10240735+1337038 LIN 10 24 07.357 +13 37 03.80   15.2       ~ 17 0
42 UGC 5627 LIN 10 24 08.727 +13 34 22.80   14.8       ~ 20 0
43 NGC 3303 LIN 10 37 00.091 +18 08 08.81   14.5       ~ 63 0
44 2MASX J10372533+1804040 G 10 37 25.349 +18 04 04.20   15.1       ~ 11 0
45 Mrk 725 GiG 10 41 50.490 +21 18 41.23   15.1       ~ 14 0
46 UGC 5822 G 10 41 52.910 +21 15 09.21   15.5       ~ 17 0
47 UGC 6033 LIN 10 55 33.131 +42 17 59.93   15.5       ~ 13 0
48 MCG+07-23-003 G 10 56 16.0574553870 +42 19 59.324643186   15.4       ~ 23 0
49 NGC 3567 GiP 11 11 18.6810660222 +05 50 10.597947037   14.4       ~ 20 0
50 MCG+01-29-012 GiP 11 11 20.6618442360 +05 49 49.023909143   15.1       ~ 12 0
51 UGC 6397 AGN 11 23 02.051 +34 29 51.83   15.0       ~ 33 0
52 MCG+06-25-059 AGN 11 23 10.788 +34 29 22.89   15.6       ~ 18 0
53 NGC 3719 rG 11 32 13.4577703513 +00 49 09.505259812   13.5   13.4 13.2 ~ 72 0
54 NGC 3720 GiP 11 32 21.5951926125 +00 48 14.526475797   13.7   12.954   ~ 76 0
55 NGC 4003 LIN 11 57 59.0231515758 +23 07 29.577965063   14.8       ~ 63 0
56 NGC 4002 Q? 11 57 59.315 +23 12 07.07   14.7       ~ 31 0
57 UGC 7383 G 12 20 01.3184062755 +08 36 28.032989417   14.8       ~ 27 0
58 MCG+02-32-006 G 12 20 09.972 +08 38 41.18   15.1       ~ 21 0
59 NGC 4446 GiC 12 28 06.793 +13 54 41.89   15.0       ~ 40 0
60 NGC 4447 LIN 12 28 12.5275601602 +13 53 57.191207997   15.2       ~ 33 0
61 2MASX J12564403+3043094 GiC 12 56 44.0154332617 +30 43 09.305006642   15.1       ~ 19 0
62 MCG+05-31-022 LIN 12 56 57.836 +30 42 58.50   14.7       ~ 29 0
63 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4246 2
64 MCG+03-35-013 GiP 13 36 53.1553390329 +17 23 13.051489681   15.0       ~ 18 0
65 MCG+03-35-014 LIN 13 36 54.4690406686 +17 24 00.065542313   15.0       ~ 18 0
66 IC 962 LIN 13 57 13.1953712215 +12 01 16.659481990   14.0       ~ 42 0
67 MCG+02-36-002 SyG 13 57 13.887 +11 59 51.01   14.9       ~ 34 0
68 NVSS J140447+304436 rG 14 04 48.051 +30 44 37.74   15.5       ~ 27 0
69 UGC 9012 LIN 14 05 28.352 +30 46 02.08   15.5       ~ 19 1
70 IC 999 LIN 14 19 32.6709672176 +17 52 31.051331838   14.5       ~ 33 0
71 IC 1000 GiP 14 19 40.3060292568 +17 51 16.798783613   14.4       ~ 31 0
72 UGC 9413 GiP 14 34 08.346 +77 53 57.50   14.8       ~ 8 0
73 MCG+13-11-002 GiP 14 34 34.9405716119 +77 57 59.696862853   14.9       ~ 13 0
74 Mrk 820 G 14 40 05.786 +31 30 06.66   15.2       ~ 22 0
75 UGC 9464 G 14 40 37.3409528643 +31 22 29.273564696   14.9       ~ 23 0
76 NGC 5771 LIN 14 52 14.3196516445 +29 50 43.544212771   14.6       ~ 27 0
77 NGC 5773 LIN 14 52 30.4296982923 +29 48 26.533154187   14.5       ~ 27 0
78 IC 1075 GiP 14 54 49.230 +18 06 21.13   14.9       ~ 30 0
79 IC 1076 rG 14 54 59.612 +18 02 14.18   13.9       ~ 53 0
80 NGC 5797 GiG 14 56 24.0564216254 +49 41 46.172981440   13.6       ~ 36 0
81 NGC 5804 AGN 14 57 06.786 +49 40 08.60   16.52 15.94     ~ 55 0
82 NGC 5857 Sy2 15 07 27.2937831304 +19 35 51.856913304   13.99 13.11     ~ 60 0
83 NGC 5859 LIN 15 07 34.750 +19 34 56.21   13.10 12.47     ~ 79 0
84 2MASX J15203501+7929456 PaG 15 20 35.017 +79 29 45.69   15.1       ~ 8 0
85 2MASX J15334543+2100383 LIN 15 33 45.4487429928 +21 00 38.177014692   15.2       ~ 14 0
86 MCG+04-37-003 G 15 33 48.9126438025 +21 08 10.308898285   14.9       ~ 20 0
87 IC 4576 GiG 15 42 35.5003596739 +23 40 12.227834919   14.8       ~ 19 0
88 IC 4577 GiG 15 42 45.5605248024 +23 47 33.486743160   15.4       ~ 17 0
89 NGC 6018 GiP 15 57 29.7747887218 +15 52 21.427922379   14.6       ~ 33 0
90 NGC 6021 LIN 15 57 30.678 +15 57 22.37   14.1       ~ 61 0
91 NGC 6251 Sy2 16 32 31.96990024 +82 32 16.3999540 15.24 14.66 12.89 7.62   ~ 670 0
92 NGC 6252 GiC 16 32 40.532 +82 34 36.55   15.1       ~ 17 0
93 NGC 6246 G 16 49 52.690 +55 32 30.80   14.2       ~ 27 0
94 UGC 10584 G 16 50 13.9750699076 +55 23 04.543893949   14.7       ~ 32 0
95 2MASX J22314033+2042504 G 22 31 40.334 +20 42 50.42   15.4       ~ 10 0
96 UGC 12067 G 22 31 46.4452530127 +20 36 14.284252300   15.3       ~ 15 0
97 IC 5242 EmG 22 41 15.2072245132 +23 24 24.642423539   14.7       ~ 35 0
98 IC 5243 rG 22 41 24.514 +23 22 32.06   14.3       ~ 31 0
99 Mrk 308 SyG 22 41 55.9565766714 +20 15 41.369187410   15.28 14.65     ~ 55 0
100 2MASX J22415846+2016211 G 22 41 58.469 +20 16 21.15   15.5       ~ 5 0
101 IC 5285 G 23 06 58.938 +22 56 11.31   14.4       ~ 40 0
102 NGC 7489 G 23 07 32.6805868048 +22 59 52.984149095   14.3       ~ 72 0

    Equat.    Gal    SGal    Ecl

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2020.09.30-19:03:47

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