2014A&A...567A.142R


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST23:46:12

2014A&A...567A.142R - Astronomy and Astrophysics, volume 567A, 142-142 (2014/7-1)

The narrow FeKα line and the molecular torus in active galactic nuclei: an IR/X-ray view.

RICCI C., UEDA Y., ICHIKAWA K., PALTANI S., BOISSAY R., GANDHI P., STALEVSKI M. and AWAKI H.

Abstract (from CDS):

The narrow component of the iron Kα is an almost ubiquitous feature in the X-ray spectra of active galactic nuclei (AGN) and is believed to originate in neutral material, possibly located in the molecular torus. This would imply a tight connection between the Fe Kα equivalent width (EW) and the physical properties of the torus. In a recent work we have shown that the decrease in the covering factor of the torus with the luminosity, as expected by luminosity-dependent unification models, would be able to explain the decrease in Fe Kα EW with the luminosity (i.e. the X-ray Baldwin effect). Recent developments in the study of the mid-IR (MIR) spectrum of AGN allow important parameters of the torus to be deduced, such as its covering factor (fobs) and equatorial column density (NHT), by applying clumpy torus models. Using XMM-Newton/EPIC observations of a sample of 24 type-I AGN, we investigate the relation between the physical parameters of the torus obtained by recent MIR works and the properties of the FeKα line. We correct the values of the Fe Kα EW by taking the inclination angle, the photon index, the equatorial column density, and half-opening angle of the torus into account using a physical torus model of X-ray reprocessed radiation. We find that the relation between FeKα EW and fobs shows a slope that is consistent with the expected value, albeit with low statistical significance. A trend that is consistent with the theoretical prediction is also found when comparing the FeKα EW to NHT. Our work seems to confirm that the bulk of the narrow FeKα line is produced by the same material responsible for the MIR emission.

Abstract Copyright:

Journal keyword(s): galaxies: Seyfert - quasars: emission lines - quasars: general - X-rays: galaxies - infrared: galaxies - galaxies: active

Simbad objects: 31

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Number of rows : 31

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 Mrk 1502 Sy1 00 53 34.9326560879 +12 41 35.927159668   14.41 14.03     ~ 1004 1
2 Mrk 1014 Sy1 01 59 50.2529351498 +00 23 40.874250335   16.08 15.87     ~ 504 0
3 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 3979 2
4 MCG+13-07-002 Sy1 08 44 45.3000235915 +76 53 09.466820353     15.7     ~ 169 0
5 PG 0953+414 Sy1 09 56 52.3930851607 +41 15 22.212153978 14.710 15.611 15.546 15.294 14.720 ~ 403 0
6 2XMM J100726.0+124856 Sy1 10 07 26.0965727406 +12 48 56.188170981   15.81 15.68     ~ 373 2
7 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1493 2
8 Ton 1388 Sy1 11 19 08.6786143504 +21 19 17.986556889   14.91 14.80     ~ 404 0
9 Mrk 1298 Sy1 11 29 16.7289412438 -04 24 07.245397091   14.97 14.61     ~ 164 1
10 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3305 2
11 Mrk 771 Sy1 12 32 03.6224248141 +20 09 29.495841579   15.57 15.30     ~ 420 0
12 LBQS 1244+0238 Sy1 12 46 35.2527388863 +02 22 08.784237661   16.57 16.37     ~ 246 0
13 Ton 1565 Sy1 13 12 17.7526648504 +35 15 21.087644341   15.45 15.64 14.2   ~ 236 1
14 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3882 3
15 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1360 0
16 ESO 445-50 Sy1 13 49 19.2607281800 -30 18 34.224136831   13.81 13.66 12.18   ~ 715 0
17 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 967 2
18 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 969 0
19 2MASS J14134834+4400141 Sy1 14 13 48.3307115344 +44 00 14.005465999   14.99 14.99     ~ 339 0
20 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2332 0
21 Mrk 1383 Sy1 14 29 06.5718492666 +01 17 06.155981953   15.21 14.87     ~ 396 0
22 2E 3305 Sy1 14 38 16.1631779228 -06 58 20.662522112   16.13 16.01 15.5   ~ 111 0
23 Mrk 478 Sy1 14 42 07.4713423763 +35 26 22.939531895   14.91 14.58     ~ 475 0
24 2MASX J14510879+2709272 Sy1 14 51 08.7649690311 +27 09 26.964855405   15.01 15.01     ~ 147 0
25 Mrk 876 Sy1 16 13 57.1791807197 +65 43 09.953889666   16.03 15.49     ~ 497 0
26 QSO B1626+5529 Sy1 16 27 56.1124169072 +55 22 31.559608363   15.79 15.68     ~ 185 0
27 IRAS 17002+5153 Sy1 17 01 24.8267412895 +51 49 20.447125726   15.49 15.12     ~ 347 0
28 NGC 6814 Sy1 19 42 40.5857305428 -10 19 25.102133898   15.33 14.21 11.7 11.3 ~ 696 0
29 4C 31.63 BLL 22 03 14.9758020 +31 45 38.269707   15.85 15.58 14.33   ~ 453 1
30 Mrk 304 Sy1 22 17 12.2638362727 +14 14 20.918554073   15.02 14.66     ~ 311 0
31 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1842 3

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2019.10.14-23:46:12

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