2008A&A...479..389H


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET02:43:50

2008A&A...479..389H - Astronomy and Astrophysics, volume 479, 389-396 (2008/2-4)

The mid IR - hard X-ray correlation in AGN and its implications for dusty torus models.

HORST H., GANDHI P., SMETTE A. and DUSCHL W.J.

Abstract (from CDS):

We investigate mid-infrared and X-ray properties of the dusty torus invoked in the unification scenario for active galactic nuclei by using the relation between mid IR and hard X-ray luminosities to constrain the geometry and physical state of the dusty torus. We present new VISIR observations of 17 nearby AGN and combined these with our earlier VISIR sample of 8 Seyfert galaxies. After combining these observations with X-ray data from the literature, we studied the correlation between their mid IR and hard X-ray luminosities. A statistically highly significant correlation is found between the rest frame 12.3µm (LMIR) and 2-10keV (LX) luminosities. Furthermore, with a probability of 97%, we find that Sy 1 and Sy 2 nuclei have the same distribution of LMIR over LX. The high resolution of our MIR imaging allows us to exclude any significant non-torus contribution to the AGN mid IR continuum, thereby implying that the similarity in the LMIR/LX ratio between Sy 1s and Sy 2s is intrinsic to AGN. We argue that this is best explained by clumpy torus models. The slope of the correlation is in good agreement with the expectations from the unified scenario and indicates little to no change in the torus geometry with luminosity. In addition, we demonstrate that the high angular resolution is crucial for AGN studies in the IR regime.

Abstract Copyright:

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

Simbad objects: 30

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Number of rows : 30

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 Mrk 937 Sy1 00 10 09.9789626127 -04 42 37.932484367   14.5 13.8 14.6   ~ 55 0
2 ESO 113-45 Sy1 01 23 45.7630391439 -58 48 20.811630442   14.08 13.83 13.34   ~ 787 0
3 NGC 526 Sy1 01 23 54.3778199024 -35 03 55.695504754   14.76 14.60 13.46   ~ 300 1
4 NGC 863 Sy1 02 14 33.5610949475 -00 46 00.180128181   14.48 13.81 17.9   ~ 594 0
5 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4180 2
6 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1201 3
7 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1500 0
8 M 61 Sy2 12 21 54.9275149050 +04 28 25.588335799 10.07 10.18 9.65     ~ 893 2
9 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1986 2
10 NGC 4507 Sy2 12 35 36.6328010225 -39 54 33.661858548   12.95 13.54 11.70 12.4 ~ 446 0
11 M 58 SyG 12 37 43.597 +11 49 05.12 10.80 10.48 9.66     ~ 985 2
12 NGC 4593 Sy1 12 39 39.4435521178 -05 20 39.035028119   13.95 13.15     ~ 972 0
13 NGC 4698 Sy2 12 48 22.9112380605 +08 29 14.648866444   13.24 12.27     ~ 449 0
14 NGC 4941 Sy2 13 04 13.1053484000 -05 33 05.754194531   13.18 12.23 10.74   ~ 315 0
15 MCG-03-34-064 Sy2 13 22 24.485 -16 43 42.09   14   13.16   ~ 269 2
16 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4077 3
17 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 434 1
18 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1400 0
19 NGC 5995 Sy2 15 48 24.9486951203 -13 45 27.258674402   14.66 13.69 13.17   ~ 132 0
20 ESO 141-55 Sy1 19 21 14.1471805047 -58 40 12.981632705   14.36 13.64 13.28   ~ 327 0
21 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1150 0
22 IC 5063 Sy2 20 52 02.329 -57 04 07.60   12.92 13.60 11.30   ~ 564 1
23 Mrk 1513 Sy1 21 32 27.8163185343 +10 08 19.250705656   14.92 14.64     ~ 553 0
24 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15   ~ 480 1
25 NGC 7213 Sy1 22 09 16.2106632887 -47 10 00.082166299   10.97 12.08 10.50 10.6 ~ 606 0
26 LEDA 68751 Sy1 22 23 49.7 -02 06 13   16.93 15.77 16.02   ~ 442 2
27 NGC 7314 Sy1 22 35 46.1969940596 -26 03 01.574026329   11.62 13.11 10.61 11.4 ~ 512 0
28 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1919 3
29 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 648 4
30 NGC 7679 Sy2 23 28 46.670 +03 30 40.99   13.2       ~ 239 1

    Equat.    Gal    SGal    Ecl

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2021.03.08-02:43:50

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