2005A&A...444..119G


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.30CEST18:22:02

2005A&A...444..119G - Astronomy and Astrophysics, volume 444, 119-132 (2005/12-2)

X-ray obscuration and obscured AGN in the local universe.

GUAINAZZI M., MATT G. and PEROLA G.C.

Abstract (from CDS):

We discuss the X-ray properties of 49 local (z<0.035) Seyfert 2 galaxies with HST/WFC2 high-resolution optical coverage. It includes the results of 26 still unpublished Chandra and XMM-Newton observations, which yield 25 (22) new X-ray detections in the 0.5-2keV (2-10keV) energy band. Our sample covers a range in the 2-10 keV observed flux, F2–10, from 3x10–11 to 6x10–15erg/cm2/s. The percentage of objects that are likely obscured by Compton-thick matter (column density, NH≥(σt)–1 ≃1.6x1024cm–2) is ≃50%, and reaches ≃80% for log (F2–10)<12.3. Hence, Kα fluorescent iron lines with large Equivalent Width (EW>0.6keV) are common in our sample (6 new detections at a confidence level ≥2σ). They are explained as due to reflection off the illuminated side of optically thick material. We confirm a correlation between the presence of a ∼100-pc scale nuclear dust in the WFC2 images and Compton-thin obscuration. We interpret this correlation as due to the large covering fraction of gas associated with the dust lanes. The X-ray spectra of highly obscured AGN invariably present a prominent soft excess emission above the extrapolation of the hard X-ray component. This soft component can account for a very large fraction of the overall X-ray energy budget. As this component is generally unobscured - and therefore likely produced in extended gas structures - it may lead to a severe underestimation of the nuclear obscuration in z∼1 absorbed AGN, if standard X-ray colors are used to classify them. As a by-product of our study, we report the discovery of a soft X-ray, luminous (≃7x1040erg/s) halo embedding the interacting galaxy pair Mkn 266.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nucleus - galaxies: Seyfert - X-ray: galaxies

Simbad objects: 33

goto Full paper

goto View the reference in ADS

Number of rows : 33

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 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 308 0
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11017 1
3 NGC 424 Sy2 01 11 27.6374462713 -38 05 00.404099901   13.76 14.12 12.38 12.8 ~ 276 0
4 NGC 449 Sy2 01 16 07.2096682810 +33 05 21.651153340   15.90 14.96     ~ 269 4
5 Mrk 993 Sy1 01 25 31.4568120260 +32 08 10.482711487   15.01 13.96     ~ 197 0
6 NGC 591 Sy2 01 33 31.2334491603 +35 40 05.621946090   14.71 13.90     ~ 187 2
7 Mrk 573 Sy2 01 43 57.7763654544 +02 20 59.525472345   14.90 14.07     ~ 486 0
8 ICRF J015002.6-072548 Sy2 01 50 02.6969570114 -07 25 48.474391488   16.86 15.62 15.62   ~ 137 0
9 Mrk 1066 Sy2 02 59 58.5970307633 +36 49 13.808979663   14.89 13.96     ~ 322 1
10 Mrk 1073 Sy2 03 15 01.406 +42 02 08.39   15.05 14.18 12.54   ~ 177 1
11 Mrk 612 Sy2 03 30 40.866 -03 08 15.69   15.03 14.25     ~ 85 0
12 NGC 1410 Sy2 03 41 10.7 -01 17 55   16.06 15.22     ~ 33 0
13 Mrk 1210 Sy2 08 04 05.8618852704 +05 06 49.810938210   14.55 13.7     ~ 260 2
14 Mrk 622 Sy2 08 07 40.9966349027 +39 00 15.262335904   14.90 14.08     ~ 138 0
15 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 752 0
16 Mrk 176 Sy2 11 32 40.2437529352 +52 57 01.304442422   15.50 14.61 13.52   ~ 227 2
17 NGC 3982 Sy1 11 56 28.169 +55 07 31.30   12.20 11.70 11.18   ~ 489 1
18 NGC 4156 LIN 12 10 49.6111682118 +39 28 22.082749602   15.01 14.32     ~ 98 1
19 IC 3639 Sy2 12 40 52.8357581136 -36 45 21.046225445   13.01 13.50 11.87 12.7 ~ 228 1
20 ESO 269-12 Sy2 12 56 40.5124266340 -46 55 34.282336379   14.72   13.54 13.9 ~ 55 0
21 NGC 4968 Sy2 13 07 05.976 -23 40 37.34   13.78 14.79 12.46   ~ 165 1
22 ESO 509-66 Sy2 13 34 39.6196769023 -23 26 47.624628434   16.60 16.6 15.19   ~ 54 1
23 NGC 5256 PaG 13 38 17.8 +48 16 41   14.1 13.42     ~ 399 2
24 NGC 5283 Sy2 13 41 05.7487638040 +67 40 19.995794737   14.97 14.05     ~ 227 0
25 2dFGRS TGN271Z063 Sy2 14 00 40.5696340260 -01 55 18.204939561   17   15.634   ~ 36 0
26 APG 271 IG 14 03 25.45 -06 02 59.9           ~ 208 0
27 NGC 5427 GiP 14 03 26.0408351752 -06 01 50.688001474   14.67 13.96 11.54   ~ 271 0
28 NGC 5953 GiP 15 34 32.402 +15 11 37.80   13.23 12.45     ~ 339 1
29 IRAS 15480-0344 Sy2 15 50 41.521 -03 53 17.58   16.20 15.1 14.83   ~ 82 0
30 IC 4995 Sy2 20 19 58.9782577650 -52 37 18.924571779   14.32 14.06 12.84   ~ 57 0
31 NGC 7130 AGN 21 48 19.490 -34 57 04.73   12.86 13.87 11.57   ~ 385 0
32 NGC 7212 Sy2 22 07 01.9866638486 +10 14 00.849716443   15.1       ~ 161 1
33 NGC 7465 GiP 23 02 00.952 +15 57 53.55   13.3       ~ 261 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2005A&A...444..119G and select 'bookmark this link' or equivalent in the popup menu


2020.09.30-18:22:02

© Université de Strasbourg/CNRS

    • Contact