2011A&A...533A.128S


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET22:06:39

2011A&A...533A.128S - Astronomy and Astrophysics, volume 533A, 128-128 (2011/9-1)

Measuring the level of nuclear activity in Seyfert galaxies and the unification scheme.

SINGH V., SHASTRI P. and RISALITI G.

Abstract (from CDS):

The unification scheme of Seyfert galaxies hypothesizes that Seyfert type 1s and type 2s are intrinsically similar and the observed differences between the two subtypes are solely due to the differing orientations of toroidal-shaped obscuring material around the AGN. In the framework of the unification scheme, both the Seyfert subtypes are expected to show similar intrinsic nuclear properties such as the absorption-corrected AGN X-ray luminosity, bolometric luminosity, accretion rate and the mass of the supermassive black hole. To test the predictions of the Seyfert unification scheme, we make statistical comparison of the distributions of: (i) the absorption-corrected 2.0-10keV X-ray luminosities; (ii) the bolometric luminosities; (iii) the black hole masses and; (iv) the Eddington ratios, of Seyfert type 1s and type 2s. We use an optically selected Seyfert sample in which type 1s and type 2s are matched in properties that are independent to the orientation of the obscuring torus, the AGN axis and the host galaxy. The distributions of the absorption-corrected 2.0-10keV X-ray luminosities (L2.0–10keVc), the bolometric luminosities (LBol), the black masses (MBH) and, the Eddington ratios (λ) are statistically similar for the two Seyfert subtypes, consistent with the orientation and obscuration based Seyfert unification scheme. The Eddington ratio distributions suggest that both the Seyfert subtypes are accreting at sub-Eddington level with wide span of Eddington ratios i.e., 10–4-10–1.

Abstract Copyright:

Journal keyword(s): galaxies: Seyfert - X-rays: galaxies - galaxies: active

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 262 Sy2 00 48 47.1414900 +31 57 25.083955 14.04 13.90 13.06 8.53   ~ 684 3
2 NGC 449 Sy2 01 16 07.2096682810 +33 05 21.651153340   15.90 14.96     ~ 271 4
3 UGC 3374 Sy1 05 54 53.6085733702 +46 26 21.625853190   15.37 14.62     ~ 473 2
4 NGC 2273 Sy2 06 50 08.6724567505 +60 50 44.879789544   14.50 13.54     ~ 476 3
5 Mrk 78 Sy2 07 42 41.7030525112 +65 10 37.433697338   15.57 14.58     ~ 336 2
6 NGC 2622 Sy1 08 38 10.9363065349 +24 53 43.041208759   15.01 14.12     ~ 133 0
7 NGC 2639 Sy1 08 43 38.093 +50 12 19.94 12.90 12.56 11.65     ~ 390 2
8 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3435 2
9 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 950 1
10 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1815 3
11 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 434 1
12 Mrk 477 Sy2 14 40 38.098 +53 30 16.24   16.05 15.03     ~ 288 1
13 NGC 5929 GiP 15 26 06.158 +41 40 14.40   13.0 14.00     ~ 421 0
14 NGC 5930 GiP 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 415 0
15 NGC 7212 Sy2 22 07 01.9866638486 +10 14 00.849716443   15.1       ~ 165 1
16 UGC 12163 Sy1 22 42 39.3364258078 +29 43 31.301194419   14.86 14.16     ~ 628 1
17 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1917 3
18 Mrk 926 Sy1 23 04 43.4773393553 -08 41 08.632325890   16.20 15.91 9.4   ~ 406 0
19 NGC 7603 Sy1 23 18 56.6537061537 +00 14 37.974617713   14.73 14.01     ~ 368 0
20 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 648 4
21 NGC 7682 Sy2 23 29 03.896 +03 32 00.00   14.3       ~ 207 0

    Equat.    Gal    SGal    Ecl

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2021.03.01-22:06:39

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