2014A&A...570A..72K

Query : 2014A&A...570A..72K

2014A&A...570A..72K - Astronomy and Astrophysics, volume 570A, 72-72 (2014/10-1)

The dichotomy of Seyfert 2 galaxies: intrinsic differences and evolution.

KOULOURIDIS E.

Abstract (from CDS):

We present a study of the local environment (≤200h–1kpc) of 31 hidden broad line region (HBLR) and 43 non-HBLR Seyfert 2 (Sy2) galaxies in the nearby universe (z≤0.04). To compare our findings, we constructed two control samples that match the redshift and the morphological type distribution of the HBLR and non-HBLR samples. We used the NASA Extragalactic Database (NED) to find all neighboring galaxies within a projected radius of 200h–1kpc around each galaxy, and a radial velocity difference δu≤500km/s. Using the digitized Schmidt survey plates (DSS) and/or the Sloan Digital Sky Survey (SDSS), when available, we confirmed that our sample of Seyfert companions is complete. We find that, within a projected radius of at least 150h–1kpc around each Seyfert, the fraction of non-HBLR Sy2 galaxies with a close companion is significantly higher than that of their control sample, at the 96% confidence level. Interestingly, the difference is due to the high frequency of mergers in the non-HBLR sample, seven versus only one in the control sample, while they also present a high number of hosts with signs of peculiar morphology. In sharp contrast, the HBLR sample is consistent with its control sample. Furthermore, the number of the HBLR host galaxies that present peculiar morphology, which probably implies some level of interactions or merging in the past, is the lowest in all four galaxy samples. Given that the HBLR Sy2 galaxies are essentially Seyfert 1 (Sy1) with their broad line region (BLR) hidden because of the obscuring torus, while the non-HBLR Sy2 galaxies probably also include true Sy2s that lack the BLR as well as heavily obscured objects that prevent even the indirect detection of the BLR, our results are discussed within the context of an evolutionary sequence of activity triggered by close galaxy interactions and merging. We argue that the non-HBLR Sy2 galaxies may represent different stages of this sequence, possibly the beginning and the end of the nuclear activity.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: Seyfert - galaxies: evolution - galaxies: interactions

Simbad objects: 150

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Number of rows : 150
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 Mrk 334 Sy1 00 03 09.6087980256 +21 57 36.971989884   15.30 14.62     ~ 201 0
2 NGC 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 350 0
3 ESO 540-1 Sy1 00 34 13.6 -21 26 24   13.66   12.36 13.5 ~ 102 0
4 NGC 262 Sy2 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 735 3
5 NGC 424 Sy2 01 11 27.6385025496 -38 05 00.421096524   13.76 14.12 12.38 12.8 ~ 324 0
6 NGC 429 EmG 01 12 57.4281188424 -00 20 42.011992896   14.4       ~ 59 0
7 NGC 527 GiG 01 23 58.1497596696 -35 06 54.407099880   14.07   12.50   ~ 39 1
8 NGC 513 Sy2 01 24 26.8053520680 +33 47 58.224514236   13.4 13.40     ~ 187 2
9 NGC 591 Sy2 01 33 31.2305692968 +35 40 05.628351108   14.71 13.90     ~ 199 2
10 NGC 590 GiP 01 33 40.8892403664 +44 55 43.918584276   14.2       ~ 23 0
11 NGC 634 GiG 01 38 18.679 +35 21 53.47   14.0       ~ 63 0
12 MCG-01-05-031 Sy2 01 45 25.4701541520 -03 49 37.694192736   14 14 12.91   ~ 48 0
13 Mrk 575 GiG 01 48 33.0997962145 +12 36 49.806839861   14.0       ~ 64 0
14 NGC 691 GiG 01 50 41.7087687336 +21 45 35.893604556   13.5       ~ 142 0
15 Mrk 582 GiP 01 58 06.681 +03 05 15.29   14.0       ~ 41 0
16 NGC 776 GiG 01 59 54.5182947984 +23 38 39.440979708   13.4       ~ 115 0
17 NGC 788 Sy2 02 01 06.4628889816 -06 48 57.149808084   13.71 12.76 11.79   ~ 265 0
18 NGC 783 GiG 02 01 06.6095353032 +31 52 56.750490588   12.84       ~ 77 1
19 NGC 897 Sy2 02 21 06.3843571752 -33 43 14.357255592   13.07   11.63   ~ 29 0
20 Mrk 1039 EmG 02 27 32.8117078176 -10 09 56.431205028   14.56   13.5 14.0 ~ 85 0
21 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4600 2
22 NGC 1143 IG 02 55 09.7142741256 -00 10 40.248085584   13.2       ~ 146 1
23 NGC 1142 Sy2 02 55 12.2311509144 -00 11 00.807149472   15.42 14.41     ~ 330 1
24 Mrk 1066 Sy2 02 59 58.5970307633 +36 49 13.808979663   14.89 13.96     ~ 348 1
25 MCG-02-08-039 Sy2 03 00 30.6274872888 -11 24 57.031067052   14 14.3 13.45   ~ 103 0
26 NGC 1168 GiP 03 00 47.0089158696 +11 46 20.053725060   15.4       ~ 20 0
27 NGC 1160 GiP 03 01 13.259 +44 57 19.52   13.0       ~ 56 0
28 NGC 1244 GiG 03 06 31.1203817472 -66 46 32.437821036   13.91   12.36   ~ 34 0
29 NGC 1241 Sy2 03 11 14.6195456232 -08 55 18.775959888 12.07 12.84 11.99 12.7 12.5 ~ 210 2
30 NGC 1320 Sy2 03 24 48.6886857672 -03 02 32.121533436   14.0 14.00     ~ 282 0
31 NGC 1341 EmG 03 27 58.3983347688 -37 09 00.271891836   12.86   11.82   ~ 81 0
32 NGC 1358 Sy2 03 33 39.6807616872 -05 05 22.213915692   14.10 13.05 11.76   ~ 201 1
33 NGC 1386 Sy1 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 520 1
34 NGC 1422 EmG 03 41 31.064 -21 40 53.38   13.99   12.93   ~ 77 0
35 NGC 1463 AG? 03 46 15.4184954352 -59 48 36.320427036   14.15   12.85 13.5 ~ 22 0
36 NGC 1459 EmG 03 46 57.9324314496 -25 31 18.301566252   13.62   12.54 13.3 ~ 52 0
37 NGC 1486 EmG 03 56 18.6839535144 -21 49 16.687561728   15.21   13.95   ~ 15 0
38 NGC 1511 GiP 03 59 36.98373 -67 38 03.3430   11.97   10.74 11.1 ~ 137 0
39 NGC 1667 Sy2 04 48 37.1804579280 -06 19 11.824427712   13.66 12.86 11.72   ~ 364 1
40 NGC 1685 Sy1 04 52 34.2987606264 -02 56 57.337701864   16.21 15.18     ~ 67 0
41 NGC 1792 Sy1 05 05 14.4036930408 -37 58 50.064531168   10.68 10.18 9.53 10.4 ~ 234 1
42 NGC 1964 Sy1 05 33 21.66912 -21 56 43.7028 11.79 11.45 10.81 10.42 11.2 ~ 135 2
43 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 662 1
44 Mrk 3 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 916 3
45 NGC 2211 GiG 06 18 30.3710726640 -18 32 14.348365476   13.70   12.19   ~ 22 0
46 NGC 2221 AG? 06 20 15.718 -57 34 42.33   13.86   13.04   ~ 29 0
47 NGC 2273 Sy2 06 50 08.6691789600 +60 50 44.864645136   14.50 13.54     ~ 527 3
48 ESO 428-14 Sy2 07 16 31.2062162520 -29 19 28.882826364   13.28 13.52 11.61   ~ 263 4
49 NGC 2375 G 07 27 09.514 +33 49 54.45   14.7       ~ 23 0
50 Mrk 78 Sy2 07 42 41.7033384240 +65 10 37.447730076   15.57 14.58     ~ 363 2
51 Mrk 1210 Sy2 08 04 05.8608218112 +05 06 49.823376120   14.55 13.7     ~ 306 2
52 NGC 2785 GiP 09 15 15.3411609600 +40 55 02.919730404   14.9       ~ 79 1
53 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 889 3
54 ESO 434-40 Sy2 09 47 40.1332188528 -30 56 55.960779696   14.10 13.69 12.44   ~ 552 0
55 NGC 3038 EmG 09 51 15.4615433184 -32 45 09.271647360   12.50 11.60 12.5 11.9 ~ 69 0
56 NGC 3081 Sy2 09 59 29.5437024336 -22 49 34.747341960   13.06 13.55 11.67 12.1 ~ 466 0
57 NGC 3092 GiG 10 00 47.4348215616 -03 00 44.629745076   14.5       ~ 29 0
58 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1391 3
59 NGC 3066 GiP 10 02 10.8998195712 +72 07 30.855522000   12.8       ~ 79 0
60 NGC 3179 G 10 17 57.2090026752 +41 06 51.528153276   14.2       ~ 32 0
61 NGC 3182 Sy2 10 19 33.0239134272 +58 12 20.586154752   13.0       ~ 111 0
62 NGC 3188 rG 10 19 42.8156315112 +57 25 24.352374792   14.7       ~ 51 0
63 NGC 3248 GiG 10 27 45.4389454896 +22 50 49.805614320   13.9       ~ 76 0
64 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 364 0
65 NAME Great Attractor SCG 10 32 -46.0           ~ 556 0
66 NGC 3285 EmG 10 33 35.8685210664 -27 27 16.005616020   12.96 12.08 11.47   ~ 63 0
67 NGC 3301 GiG 10 36 56.0401118904 +21 52 55.516904976   12.2       ~ 140 0
68 NGC 3347 EmG 10 42 46.6312655976 -36 21 11.738456136   12.18 11.35 10.90   ~ 69 0
69 NGC 3362 Sy2 10 44 51.7308466464 +06 35 48.665072040   17.58 16.96     ~ 159 0
70 NGC 3393 Sy2 10 48 23.4653152920 -25 09 43.487648784   13.10 13.95 11.67 12.2 ~ 424 1
71 NGC 3381 GiG 10 48 24.7990862064 +34 42 41.068596852   12.8       ~ 168 0
72 NGC 3462 GiG 10 55 21.0575575464 +07 41 48.333930864   13.4       ~ 43 0
73 NGC 3465 GiG 10 59 31.2700275648 +75 11 28.747929624   14.6       ~ 28 0
74 UGC 6100 Sy2 11 01 33.9652636464 +45 39 13.917158280   14.1       ~ 121 0
75 IC 673 Sy2 11 09 25.2839934312 -00 05 51.873740016   14.06   13.646 14.1 ~ 61 1
76 NGC 3600 GiG 11 15 51.980 +41 35 28.96   12.6       ~ 111 0
77 NGC 3660 Sy2 11 23 32.2781260536 -08 39 30.730097016   15.34 14.45     ~ 178 0
78 NGC 3725 LIN 11 33 40.5376843224 +61 53 16.898416548   13.6       ~ 71 0
79 IC 2943 GiC 11 36 42.3067313184 +54 50 45.576089232   15.0       ~ 35 0
80 NGC 3982 Sy1 11 56 28.1445516072 +55 07 30.859586652   12.20 11.70 11.18   ~ 550 1
81 NGC 4082 LIN 12 05 11.4537200928 +10 40 14.399123088   15.5       ~ 23 0
82 NGC 4117 Sy2 12 07 46.1195809200 +43 07 34.818483864   14.04       ~ 167 1
83 NGC 4217 GiG 12 15 50.900 +47 05 30.44   12.4       ~ 300 2
84 NGC 4369 GiG 12 24 36.204 +39 22 58.73   12.3       ~ 189 1
85 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1340 2
86 NGC 4488 GiG 12 30 51.3727669680 +08 21 35.998048692   13.8       ~ 96 0
87 M 88 Sy2 12 31 59.1525062448 +14 25 13.148971824   14.33 13.18     ~ 804 1
88 NGC 4507 Sy2 12 35 36.6338976888 -39 54 33.710416272   12.95 13.54 11.70 12.4 ~ 495 0
89 NGC 4573 GiG 12 37 43.7685618072 -43 37 15.948864876   13.48   12.09   ~ 27 0
90 NGC 4601 GiG 12 40 46.7414318568 -40 53 34.907747424   14.58 14.20 12.97   ~ 29 0
91 IC 3639 Sy2 12 40 52.8344884344 -36 45 21.057011172   13.01 13.50 11.87 12.7 ~ 247 1
92 NGC 4608 GiP 12 41 13.2848464320 +10 09 20.336341500   12.6       ~ 194 0
93 NGC 4664 GiG 12 45 06.0013449504 +03 03 20.738321784   11.50 10.50     ~ 171 1
94 NGC 4679 EmG 12 47 30.2590763880 -39 34 15.295008504   13.32 11.90 12.20 12.8 ~ 80 0
95 NGC 4800 GiG 12 54 37.7814061056 +46 31 52.276624140   12.0       ~ 145 0
96 NGC 4941 Sy2 13 04 13.1036380320 -05 33 05.752803672   13.18 12.23 10.74   ~ 369 0
97 NGC 5014 rG 13 11 31.2417164616 +36 16 55.998720012   13.5       ~ 151 0
98 MCG-03-34-064 Sy2 13 22 24.4583154360 -16 43 42.481822404   14   13.16   ~ 315 2
99 NGC 5134 EmG 13 25 18.5250908808 -21 08 03.066281880   12.11   10.77 11.3 ~ 109 0
100 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4482 3
101 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 474 1
102 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4329 4
103 NGC 5233 LIN 13 35 13.334 +34 40 38.37   14.8       ~ 31 0
104 NGC 5252 Sy2 13 38 15.8707724328 +04 32 33.521265600   15.21 14.21     ~ 480 0
105 NGC 5256 PaG 13 38 17.81 +48 16 41.2   14.1 13.42     ~ 430 1
106 NGC 5283 Sy2 13 41 05.7499712616 +67 40 19.967186280   14.97 14.05     ~ 257 0
107 Mrk 1361 Sy2 13 47 04.3567576992 +11 06 22.663156500   15.5       ~ 65 0
108 NGC 5347 Sy2 13 53 17.7984934128 +33 29 27.011618196   13.46 12.70     ~ 353 1
109 NGC 5352 rG 13 53 38.4324030744 +36 08 02.534111916   14.4       ~ 39 1
110 NGC 5339 GiG 13 54 00.2660800368 -07 55 50.387342088   16.5       ~ 82 0
111 NGC 5383 GiG 13 57 04.9709727768 +41 50 46.419238680   12.5   10.95   ~ 339 0
112 NGC 5506 Sy2 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1091 0
113 NGC 5607 G 14 19 26.693 +71 35 17.75   13.9       ~ 54 0
114 Mrk 677 G 14 19 36.0 +36 08 39   17.0       ~ 4 1
115 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 571 0
116 NGC 5695 Sy2 14 37 22.1349838776 +36 34 04.201272336   14.55 13.60     ~ 201 0
117 Mrk 477 Sy2 14 40 38.0960806920 +53 30 15.961505184   16.05 15.03     ~ 317 1
118 NGC 5728 Sy2 14 42 23.8918506576 -17 15 11.240783784   14.34 13.40     ~ 594 0
119 NGC 5743 EmG 14 45 10.983 -20 54 48.81   13.85   12.54   ~ 46 1
120 NGC 5829 AG? 15 02 42.0057190680 +23 20 00.960234468   14.14   12.93   ~ 93 0
121 NGC 5929 Sy1 15 26 06.1564333536 +41 40 14.384294616   13.0 14.00     ~ 440 0
122 NGC 5930 GiP 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 431 0
123 NGC 5995 Sy2 15 48 24.9463652328 -13 45 27.241966908   14.66 13.69 13.17   ~ 163 0
124 NGC 6030 GiG 16 01 51.4174712664 +17 57 26.915090976   14.5       ~ 39 0
125 NGC 6300 Sy2 17 16 59.5418094960 -62 49 13.946588832   10.88 13.08 9.44 10.2 ~ 431 0
126 NGC 6403 GiG 17 43 23.5345249344 -61 40 55.629280668   14.33   13.24   ~ 20 0
127 NGC 6552 Sy2 18 00 07.2518347776 +66 36 54.360343188   14.6 13.74     ~ 161 2
128 NGC 6660 GiG 18 34 36.6625551912 +22 54 34.767624780   14.1       ~ 45 0
129 NGC 6890 Sy2 20 18 18.1057797216 -44 48 24.750633168   13.06 14.02 11.57   ~ 164 0
130 IC 5063 Sy2 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 649 1
131 NGC 6990 G 20 59 56.8987310712 -55 33 42.418861128   13.99   12.99   ~ 21 0
132 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 450 0
133 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15 25.10 ~ 529 1
134 NGC 7212 Sy2 22 07 01.9870259424 +10 14 00.838175892   15.1       ~ 196 1
135 NGC 7272 G 22 24 31.7284553448 +16 35 17.465187660   15.0       ~ 20 0
136 NGC 7312 GiC 22 34 34.7927465184 +05 49 02.454164148   14.5       ~ 28 0
137 NGC 7314 Sy2 22 35 46.1985355872 -26 03 01.564993476   11.62 13.11 10.61 11.4 ~ 565 0
138 MCG-03-58-007 Sy2 22 49 37.1473817784 -19 16 26.364266220   15.62 14.79     ~ 109 0
139 NGC 7415 G 22 54 53.6132391360 +20 15 41.842639008   15.0       ~ 11 0
140 NGC 7496 Sy2 23 09 47.2876854912 -43 25 40.279652796   11.92 13.90 10.95 11.5 ~ 294 1
141 IC 5298 Sy2 23 16 00.6756811155 +25 33 24.081139422   15.0       ~ 193 0
142 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 906 2
143 NGC 7600 AG? 23 18 53.8425354720 -07 34 49.679666040   13   11.68   ~ 72 0
144 NGC 7590 Sy1 23 18 54.7949760192 -42 14 20.515300476   12.12 13.76 11.06 11.8 ~ 277 1
145 NGC 7672 Sy2 23 27 31.4358992112 +12 23 06.832583628   15.05 14.21     ~ 90 0
146 NGC 7674 Sy2 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 700 4
147 NGC 7683 GiG 23 29 03.8180030520 +11 26 42.645888420   14.60       ~ 61 0
148 NGC 7682 Sy2 23 29 03.9181335984 +03 31 59.921415444   14.3       ~ 233 0
149 NGC 7773 G 23 52 09.8999080056 +31 16 35.973174252   14.5       ~ 26 0
150 NGC 7779 GiG 23 53 26.7798211824 +07 52 32.369391732   13.6       ~ 43 0

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