2013ApJ...768...30Y

Query : 2013ApJ...768...30Y

2013ApJ...768...30Y - Astrophys. J., 768, 30 (2013/May-1)

Testing the evolutionary sequence between hidden broad-line region (HBLR) and non-HBLR Seyfert 2 galaxies with the 4000 Å break strengths.

YU P.-C., HUANG K.-Y., HWANG C.-Y. and OHYAMA Y.

Abstract (from CDS):

We compare the 4000 Å break (Dn(4000)) strength in the central kpc of hidden broad-line region (HBLR) and non-HBLR Seyfert 2 galaxies to investigate the origin of these galaxies. Our results show that the Dn(4000) strengths in the nuclear regions of the non-HBLR Seyfert 2 galaxies are larger than those in the HBLR galaxies. We also show that the Dn(4000) strength is not related to the morphology of host galaxies. These results imply that the non-HBLR Seyfert 2 galaxies have an older stellar population in nuclear regions than the HBLR galaxies. This suggests that an evolutionary connection might exist between non-HBLR and HBLR Seyfert 2 galaxies. We propose a potential evolutionary scenario and a modified unification model for Seyfert galaxies. In this scheme, Seyfert 1 and HBLR Seyfert 2 galaxies evolve into unabsorbed and absorbed non-HBLR Seyfert 2 galaxies. We also discuss the implications of our results in the hydrogen column density distribution of the non-HBLR Seyfert 2 galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: nuclei - galaxies: Seyfert - Galaxy: stellar content

Simbad objects: 27

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Number of rows : 27
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 386-35 Sy1 01 43 57.7777898304 +02 20 59.531401716   14.90 14.07     ~ 569 1
2 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
3 NGC 1143 IG 02 55 09.7142741256 -00 10 40.248085584   13.2       ~ 154 1
4 Z 524-40 Sy2 02 59 58.5970307633 +36 49 13.808979663   14.89 13.96     ~ 369 1
5 NGC 1241 Sy2 03 11 14.6195456232 -08 55 18.775959888 12.07 12.84 11.99 12.7 12.5 ~ 221 2
6 NGC 1320 Sy2 03 24 48.6886857672 -03 02 32.121533436   14.0 14.00     ~ 317 0
7 NGC 2273 Sy1 06 50 08.6691789600 +60 50 44.864645136   14.50 13.54     ~ 566 2
8 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
9 NGC 3362 Sy2 10 44 51.7308466464 +06 35 48.665072040   17.58 16.96     ~ 162 1
10 Z 241-59 Sy2 11 01 33.9652636464 +45 39 13.917158280   14.1       ~ 133 0
11 NGC 3982 Sy2 11 56 28.1445516072 +55 07 30.859586652   12.20 11.70 11.18   ~ 588 1
12 NGC 4117 Sy2 12 07 46.1195809200 +43 07 34.818483864   14.04       ~ 178 1
13 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1433 2
14 M 88 Sy2 12 31 59.1525062448 +14 25 13.148971824   14.33 13.18     ~ 843 1
15 NGC 4941 Sy2 13 04 13.1036380320 -05 33 05.752803672   13.18 12.23 10.74   ~ 410 0
16 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
17 NGC 5252 Sy2 13 38 15.8707724328 +04 32 33.521265600   15.21 14.21     ~ 514 1
18 NGC 5256 PaG 13 38 17.81 +48 16 41.2   14.1 13.42     ~ 449 1
19 NGC 5283 Sy2 13 41 05.7499712616 +67 40 19.967186280   14.97 14.05     ~ 269 0
20 Z 73-74 Sy2 13 47 04.3567576992 +11 06 22.663156500   15.5       ~ 72 0
21 NGC 5347 Sy2 13 53 17.7984934128 +33 29 27.011618196   13.46 12.70     ~ 373 1
22 NGC 5506 Bla 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1173 1
23 NGC 5695 Sy2 14 37 22.1349838776 +36 34 04.201272336   14.55 13.60     ~ 215 0
24 Z 273-23 Sy2 14 40 38.0960806920 +53 30 15.961505184   16.05 15.03     ~ 341 1
25 NGC 5929 Sy1 15 26 06.1564333536 +41 40 14.384294616   13.0 14.00     ~ 450 0
26 NGC 5930 AGN 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 441 0
27 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2

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