2001ApJ...554L..19T

Query : 2001ApJ...554L..19T

2001ApJ...554L..19T - Astrophys. J., 554, L19-L23 (2001/June-2)

Hidden broad-line Seyfert 2 galaxies in the CfA and 12 µm samples.

TRAN H.D.

Abstract (from CDS):

We report the results of a spectropolarimetric survey of the CfA and 12 µm samples of Seyfert 2 (S2) galaxies. Polarized (hidden) broad-line regions (HBLRs) are confirmed in a number of galaxies, and several new cases (F02581-1136, MCG -3-58-7, NGC 5995, NGC 6552, NGC 7682) are reported. The 12 µm S2 galaxy sample shows a significantly higher incidence of HBLRs (50%) than its CfA counterpart (30%), suggesting that the latter may be incomplete in hidden active galactic nuclei. Compared to the non-HBLR S2 galaxies, the HBLR S2 galaxies display distinctly higher radio power relative to their far-infrared output and hotter dust temperature as indicated by the f25/f60 color. However, the level of obscuration is indistinguishable between the two types of S2 galaxies. These results strongly support the existence of two intrinsically different populations of S2 galaxies: one harboring an energetic, hidden S1 nucleus with a broad-line region and the other a ``pure'' S2 galaxy, with a weak or absent S1 nucleus and a strong, perhaps dominating starburst component. Thus, the simple purely orientation-based unification model is not applicable to all Seyfert galaxies.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: Seyfert - Polarization

CDS comments: t.1 : IRAS F19254-7445 misprint for F19254-7245

Simbad objects: 59

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Number of rows : 59
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 NGC 17 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 369 1
2 2MASX J00215355-7910077 Sy2 00 21 53.5554103848 -79 10 08.025602016   17.33 16.3 15.19   ~ 82 0
3 MCG-04-02-018 Sy2 00 34 13.60 -21 26 19.8   13.66   12.36 13.5 ~ 109 1
4 NGC 262 Bla 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 778 2
5 IRAS 00521-7054 Sy2 00 53 56.2229333640 -70 38 04.243791912 17.83 17.22 16.2 16.14 14.55 ~ 109 0
6 ESO 541-12 Sy2 01 02 17.3718161376 -19 40 08.607886860   15.40 16.50 14.08   ~ 62 0
7 NGC 424 Sy1 01 11 27.6385025496 -38 05 00.421096524   13.76 14.12 12.38 12.8 ~ 346 1
8 NGC 513 Sy2 01 24 26.8053520680 +33 47 58.224514236   13.4 13.40     ~ 201 1
9 Z 386-35 Sy1 01 43 57.7777898304 +02 20 59.531401716   14.90 14.07     ~ 569 1
10 ICRF J015002.6-072548 Sy1 01 50 02.6975795592 -07 25 48.453672360   16.86 15.62 15.62   ~ 162 1
11 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
12 NGC 1125 Sy2 02 51 40.44 -16 39 02.4   13.98 13.13 12.48   ~ 158 1
13 NGC 1142 Sy2 02 55 12.2311509144 -00 11 00.807149472   15.42 14.41     ~ 350 1
14 NGC 1194 Sy2 03 03 49.1124029328 -01 06 13.415103900   15.29 14.18     ~ 307 0
15 NGC 1241 Sy2 03 11 14.6195456232 -08 55 18.775959888 12.07 12.84 11.99 12.7 12.5 ~ 221 2
16 NGC 1320 Sy2 03 24 48.6886857672 -03 02 32.121533436   14.0 14.00     ~ 317 0
17 NGC 1386 Sy1 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 553 1
18 LEDA 13422 Sy2 03 38 33.5520704184 -16 32 18.242798532   17.67 16.39 17.04   ~ 59 0
19 IRAS 04385-0828 Sy1 04 40 54.9608896320 -08 22 22.126721232   15.71 14.5     ~ 128 0
20 NGC 1667 Sy2 04 48 37.1804579280 -06 19 11.824427712   13.66 12.86 11.72   ~ 384 2
21 ESO 33-2 Sy2 04 55 58.93368 -75 32 28.2336   14.61 14.60 13.39   ~ 177 1
22 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0
23 ESO 253-3 Sy2 05 25 18.058 -46 00 21.36 15.95 15.10 14.77 13.95   ~ 80 0
24 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
25 NGC 3147 Sy2 10 16 53.6388580752 +73 24 02.641798224   11.43 10.61     ~ 533 2
26 NGC 3362 Sy2 10 44 51.7308466464 +06 35 48.665072040   17.58 16.96     ~ 162 1
27 Z 241-59 Sy2 11 01 33.9652636464 +45 39 13.917158280   14.1       ~ 133 0
28 NGC 3660 Sy2 11 23 32.2781260536 -08 39 30.730097016   15.34 14.45     ~ 185 0
29 NGC 3822 Sy2 11 42 11.0963209488 +10 16 39.965991204   13.7   12.97   ~ 142 0
30 NGC 3982 Sy2 11 56 28.1445516072 +55 07 30.859586652   12.20 11.70 11.18   ~ 588 1
31 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1433 2
32 M 88 Sy2 12 31 59.1525062448 +14 25 13.148971824   14.33 13.18     ~ 843 1
33 IC 3639 Sy1 12 40 52.8344884344 -36 45 21.057011172   13.01 13.50 11.87 12.7 ~ 262 1
34 NGC 4941 Sy2 13 04 13.1036380320 -05 33 05.752803672   13.18 12.23 10.74   ~ 410 0
35 NGC 4968 Sy2 13 07 05.976 -23 40 37.34   13.78 14.79 12.46 12.78 ~ 198 2
36 MCG-03-34-064 Sy2 13 22 24.4583154360 -16 43 42.481822404   14   13.16   ~ 345 2
37 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 500 1
38 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
39 NGC 5256B Sy2 13 38 17.3501417856 +48 16 31.909717416   14.19 13.42     ~ 91 0
40 NGC 5283 Sy2 13 41 05.7499712616 +67 40 19.967186280   14.97 14.05     ~ 269 0
41 Z 190-55 Sy2 13 47 17.7559627128 +34 08 55.633887528   14.5       ~ 103 1
42 NGC 5347 Sy2 13 53 17.7984934128 +33 29 27.011618196   13.46 12.70     ~ 373 1
43 Mrk 463E Sy1 13 56 02.88573 +18 22 18.8440   15.01 14.22     ~ 158 1
44 NGC 5506 Bla 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1173 1
45 NGC 5695 Sy2 14 37 22.1349838776 +36 34 04.201272336   14.55 13.60     ~ 215 0
46 NGC 5929 Sy1 15 26 06.1564333536 +41 40 14.384294616   13.0 14.00     ~ 450 0
47 NGC 5930 AGN 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 441 0
48 NGC 5995 Sy2 15 48 24.9463652328 -13 45 27.241966908   14.66 13.69 13.17   ~ 180 1
49 IRAS 15480-0344 Sy1 15 50 41.4972847704 -03 53 17.990582640   16.20 15.1 14.83   ~ 105 1
50 NGC 6552 Sy2 18 00 07.2518347776 +66 36 54.360343188   14.6 13.74     ~ 184 1
51 NAME Super Antennae Sy2 19 31 21.4272801984 -72 39 21.442847832   17.39 16.37 14.65   ~ 318 3
52 NGC 6890 Sy2 20 18 18.1057797216 -44 48 24.750633168   13.06 14.02 11.57   ~ 171 0
53 IC 5063 Bla 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 710 1
54 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15 25.10 ~ 572 2
55 IRAS 22017+0319 Sy2 22 04 19.1643461808 +03 33 51.253679232     15.4     ~ 97 0
56 MCG-03-58-007 Sy1 22 49 37.1473817784 -19 16 26.364266220   15.62 14.79     ~ 120 1
57 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
58 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2
59 NGC 7682 Sy2 23 29 03.9181335984 +03 31 59.921415444   14.3       ~ 254 1

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