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


Query : 2014A&A...567A.142R

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 - 2023
#notes
1 Mrk 1502 Sy1 00 53 34.9331107632 +12 41 35.929269132   14.41 14.03     ~ 1118 1
2 Mrk 1014 Sy1 01 59 50.2534701768 +00 23 40.864244784   16.08 15.87     ~ 554 0
3 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4425 2
4 MCG+13-07-002 Sy1 08 44 45.2999013720 +76 53 09.465739008     15.7     ~ 182 0
5 PG 0953+414 Sy1 09 56 52.3931554992 +41 15 22.211247636 14.710 15.611 15.546 15.294 14.720 ~ 439 0
6 4C 13.41 Sy1 10 07 26.0965408440 +12 48 56.184940764   15.81 15.68     ~ 394 2
7 NGC 3227 GiP 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1643 1
8 Ton 1388 Sy1 11 19 08.6786220240 +21 19 17.987085948   14.91 14.80     ~ 450 0
9 Mrk 1298 Sy1 11 29 16.7288400936 -04 24 07.246460520   14.97 14.61     ~ 193 1
10 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3574 2
11 Mrk 771 Sy1 12 32 03.6223710000 +20 09 29.495834136   15.57 15.30     ~ 472 0
12 LBQS 1244+0238 Sy1 12 46 35.2527826632 +02 22 08.782546368   16.57 16.37     ~ 280 0
13 Ton 1565 Sy1 13 12 17.7526981968 +35 15 21.086467128   15.45 15.64 14.2   ~ 261 1
14 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4320 3
15 ESO 383-35 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1451 0
16 ESO 445-50 Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 771 0
17 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1127 2
18 NGC 5506 AGN 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1062 0
19 LEDA 50824 Sy1 14 13 48.3306274368 +44 00 14.003371296   14.99 14.99     ~ 371 0
20 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2590 0
21 Mrk 1383 Sy1 14 29 06.5720038632 +01 17 06.155007252   15.21 14.87     ~ 439 0
22 LEDA 52314 Sy1 14 38 16.1630434488 -06 58 20.662907124   16.13 16.01 15.5   ~ 119 0
23 Mrk 478 Sy1 14 42 07.4714418744 +35 26 22.938625500   14.91 14.58     ~ 518 0
24 2MASX J14510879+2709272 Sy1 14 51 08.7647938560 +27 09 26.962707132   15.01 15.01     ~ 194 0
25 Mrk 876 Sy1 16 13 57.1795021224 +65 43 09.952685328   16.03 15.49     ~ 553 0
26 QSO B1626+5529 Sy1 16 27 56.1123628752 +55 22 31.559061504   15.79 15.68     ~ 202 0
27 IRAS 17002+5153 Sy1 17 01 24.8265469104 +51 49 20.447878836   15.49 15.12     ~ 370 0
28 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 776 0
29 4C 31.63 BLL 22 03 14.9756830008 +31 45 38.269473228   15.85 15.58 14.33   ~ 479 1
30 Mrk 304 Sy1 22 17 12.2637639888 +14 14 20.917852980   15.02 14.66     ~ 340 0
31 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 2027 3

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2023.02.01-06:19:33

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