2018MNRAS.477.3775B

Query : 2018MNRAS.477.3775B

2018MNRAS.477.3775B - Mon. Not. R. Astron. Soc., 477, 3775-3790 (2018/July-1)

An Iwasawa-Taniguchi effect for Compton-thick active galactic nuclei.

BOORMAN P.G., GANDHI P., BALOKOVIC M., BRIGHTMAN M., HARRISON F., RICCI C. and STERN D.

Abstract (from CDS):

We present the first study of an Iwasawa-Taniguchi/'X-ray Baldwin' effect for Compton-thick active galactic nuclei (AGN). We report a statistically significant anticorrelation between the rest-frame equivalent width (EW) of the narrow core of the neutral Fe Kα fluorescence emission line, ubiquitously observed in the reflection spectra of obscured AGN, and the mid-infrared 12 µm continuum luminosity (taken as a proxy for the bolometric AGN luminosity). Our sample consists of 72 Compton-thick AGN selected from pointed and deep-field observations covering a redshift range of z ∼ 0.0014-3.7. We employ a Monte Carlo-based fitting method, which returns a Spearman's Rank correlation coefficient of ρ = - 0.28 ± 0.12, significant to 98.7 per cent confidence. The best-fitting found is log(EWFeKα) ∝-0.08±0.04 log(L_12 µm_), which is consistent with multiple studies of the X-ray Baldwin effect for unobscured and mildly obscured AGN. This is an unexpected result, as the Fe Kα line is conventionally thought to originate from the same region as the underlying reflection continuum, which together constitute the reflection spectrum. We discuss the implications this could have if confirmed on larger samples, including a systematic underestimation of the line-of-sight X-ray obscuring column density and hence the intrinsic luminosities and growth rates for the most luminous AGN.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

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

CDS comments: COSMOS 0363 = [ECV2009] 443 ; COSMOS 0581 = [ECV2009] 762 ; COSMOS 0987 = [ECV2009] 679. COSMOS 0661 and COSMOS 1517 not identified (not enough information).

Simbad objects: 87

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Number of rows : 87
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 424 Sy1 01 11 27.6385025496 -38 05 00.421096524   13.76 14.12 12.38 12.8 ~ 346 1
2 MCG+08-03-018 Sy2 01 22 34.4194292400 +50 03 17.867834532   16       ~ 47 0
3 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
4 LEDA 166445 Sy2 02 50 42.6195217728 +54 42 17.656263324           ~ 66 0
5 NGC 1194 Sy2 03 03 49.1124029328 -01 06 13.415103900   15.29 14.18     ~ 307 0
6 NGC 1229 Sy2 03 08 10.8346520856 -22 57 36.937886004   14.87 14.45 13.86   ~ 90 0
7 NGC 1320 Sy2 03 24 48.6886857672 -03 02 32.121533436   14.0 14.00     ~ 317 0
8 CXOCDFS J033150.5-275213 Sy2 03 31 50.41 -27 52 12.3       24.010 23.48 ~ 22 0
9 2XMM J033150.9-274116 QSO 03 31 50.95 -27 41 16.0 23.19 22.570 22.67 22.256   ~ 25 0
10 2MASS J03320855-2746483 rG 03 32 08.538 -27 46 48.55   21.0851 20.1035 19.224 18.9552 ~ 63 0
11 EIS-DEEP CDFS-1 J 1 1313 rG 03 32 10.721 -27 48 06.95   24.910 23.441 23.04 22.164 ~ 40 0
12 ACS-GC 90044755 AGN 03 32 14.078 -27 42 30.42   24.8973 24.55 24.169 24.6537 ~ 36 0
13 ACS-GC 90045313 Sy2 03 32 16.14982 -27 49 41.6993   21.553   21.322 20.476 ~ 54 1
14 EIS-DEEP CDFS-3 J 1 736 rG 03 32 18.02400 -27 49 53.0342   21.238   21.026 20.335 ~ 28 0
15 CXOCDFS J033218.5-274557 AGN 03 32 18.44318 -27 45 55.8709   22.344 23.35 25.010 21.2672 ~ 49 1
16 CXOCDFS J033218.9-275136 Sy2 03 32 18.8321 -27 51 35.476   25.15   24.51 25.128 ~ 83 0
17 GOODS-MUSIC 17666 rG 03 32 19.386 -27 40 51.62   23.2462 22.7624 21.625 21.0828 ~ 32 0
18 ACS-GC 90045761 rG 03 32 19.817 -27 41 22.59 23.36 21.0407 19.580 19.178 18.9776 ~ 63 0
19 Anon J033222-2744 rG 03 32 22.597 -27 44 26.11   22.4627 21.570 21.101 20.6063 ~ 62 1
20 ACS-GC 90043834 AGN 03 32 23.434 -27 42 55.02   25.861 25.14 25.324 24.698 ~ 47 0
21 [RNL2013] cdfs4Ms 345 AGN 03 32 24.651 -27 54 42.90   20.271   19.45 18.996 ~ 9 0
22 ACS-GC 90040981 Sy2 03 32 25.157 -27 54 50.10   23.166   23.17 22.1691 ~ 66 0
23 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
24 ALESS J033229.29-275619.7 Sy1 03 32 29.2912 -27 56 19.465     26.76 25.82 25.1655 ~ 122 0
25 ACS-GC 90044741 AGN 03 32 29.478 -27 43 22.12   24.9899 24.73 24.94 24.0969 ~ 33 0
26 EIS-DEEP CDFS-2 J 1 329 AGN 03 32 32.0408 -27 44 51.735   25.2464   22.90 21.998 ~ 37 0
27 CXOCDFS J033234.9-275413 EmG 03 32 34.92310 -27 54 13.7196   21.1809   19.982 19.9031 ~ 22 0
28 NAME BzK 4892 Sy2 03 32 35.73 -27 49 16.2   25.681 27.798 25.00 24.645 ~ 89 0
29 CXOECDFS J033241.9-273948 rG 03 32 41.99 -27 39 49.7       19.01   ~ 24 0
30 ATCDFS9 J033249.19-274050.7 Sy2 03 32 49.2 -27 40 50   22.613 23.0872 22.61 21.5187 ~ 54 1
31 CXOCDFS J033305.8-275215 rG 03 33 05.68 -27 52 14.6   21.669 20.97 19.647 18.79 ~ 36 0
32 NGC 1448 EmG 03 44 31.915 -44 38 41.38   11.46   10.24 10.9 ~ 295 1
33 ESO 201-4 Sy2 03 50 22.9859322624 -50 18 09.403324596   15.03   13.19   ~ 34 0
34 IRAS 03556-6300 Bla 03 56 19.954 -62 51 39.19   18.43   17.39   ~ 40 0
35 MCG-02-12-017 Sy2 04 27 01.4120552712 -12 03 34.092448560   15   14.43   ~ 34 0
36 Z 420-15 Sy2 04 53 25.7402917464 +04 03 41.809965948   15.0       ~ 144 0
37 ESO 5-4 Sy2 06 05 41.721 -86 37 55.02   13.55   11.88 12.2 ~ 174 1
38 Z 329-24 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 960 2
39 NGC 2273 Sy1 06 50 08.6691789600 +60 50 44.864645136   14.50 13.54     ~ 566 2
40 Z 176-27 Sy2 07 14 03.876 +35 16 45.59   14.5       ~ 85 1
41 Z 31-36 Sy2 08 04 05.8608218112 +05 06 49.823376120   14.55 13.7     ~ 340 2
42 2MASS J09235373-3141308 Sy2 09 23 53.7372628512 -31 41 30.973010460   16.57   15.09   ~ 51 0
43 Z 289-11 Sy2 09 35 51.6045544584 +61 21 11.589382368   15.20 15.50     ~ 617 2
44 2MASS J09591024+0207321 Sy2 09 59 10.3133295984 +02 07 32.243334564 21.59 20.73 20.00   18.496 ~ 50 0
45 ACS-GC 20122146 rG 09 59 54.166 +02 27 41.16 21.969 21.485 20.311 19.877 19.347 ~ 29 0
46 ACS-GC 20094946 QSO 10 00 11.041 +02 12 04.05         22.37 ~ 33 0
47 ACS-GC 20060668 rG 10 01 09.88 +02 05 21.5 24.50 24.28 23.70 23.63 23.11 ~ 20 0
48 ACS-GC 20010159 Sy2 10 01 14.971 +01 43 48.31 22.92 22.332 21.82   20.03 ~ 38 0
49 2MASX J10014194+0203577 LIN 10 01 41.984 +02 03 58.15 20.88 19.56 18.54 17.427 16.11 ~ 36 0
50 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
51 IC 2560 Sy2 10 16 18.7073057664 -33 33 49.720274676   12.53 13.31 11.25 12.2 ~ 283 1
52 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 392 1
53 MCG+10-15-104 Sy2 10 34 08.54424 +60 01 52.1004   15.71 14.65     ~ 271 1
54 WISE J103648.32+044951.1 G 10 36 48.323 +04 49 51.11           ~ 7 0
55 NGC 3393 Sy2 10 48 23.4653152920 -25 09 43.487648784   13.10 13.95 11.67 12.2 ~ 471 1
56 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
57 NGC 3690B GiP 11 28 31.02 +58 33 40.7   11.8       ~ 635 4
58 IC 751 Sy2 11 58 52.60109 +42 34 13.3059   15.39 14.39     ~ 94 1
59 NGC 4102 Sy2 12 06 23.11513 +52 42 39.4160   11.8       ~ 449 1
60 NGC 4180 Sy2 12 13 03.0632893416 +07 02 20.036449716   13.2       ~ 173 1
61 IC 3639 Sy1 12 40 52.8344884344 -36 45 21.057011172   13.01 13.50 11.87 12.7 ~ 262 1
62 NGC 4785 Sy2 12 53 27.3416048448 -48 44 57.213423456   13.22 12.09 12.8 12.5 ~ 75 0
63 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
64 NGC 4939 Sy2 13 04 14.3280524928 -10 20 22.300454724   14.81 13.80 10.92   ~ 332 1
65 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
66 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
67 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
68 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
69 LEDA 511869 Sy2 14 17 03.6615251736 -46 41 41.225045820   12.5   15.0   ~ 56 2
70 ACS-GC 13019868 rG 14 19 13.66971 +52 53 50.3655   22.41   20.796 20.178 ~ 9 0
71 AEGIS20 J141922.06+525519.0 rG 14 19 22.05003 +52 55 19.0051   23.93   21.968 20.860 ~ 11 0
72 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 652 1
73 NGC 5728 Sy2 14 42 23.8918506576 -17 15 11.240783784   14.34 13.40     ~ 679 1
74 Z 164-19 Sy2 14 45 36.8464489536 +27 02 05.566485732   12.7 15.3 11.9   ~ 86 0
75 2XMM J153244.0+324248 Sy2 15 32 44.0246599800 +32 42 46.679782356     19.8     ~ 109 0
76 ESO 137-34 Sy2 16 35 14.114 -58 04 48.10   12.20   10.84 11.6 ~ 165 0
77 NGC 6232 Sy2 16 43 20.2476632184 +70 37 57.180386136   15.8       ~ 65 1
78 ESO 138-1 Sy2 16 51 20.2789606296 -59 14 04.184655576   14.35 13.63 13.02   ~ 162 0
79 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
80 NGC 6921 Sy2 20 28 28.8658027224 +25 43 24.094324884 15.41   12.897     ~ 104 1
81 MCG-05-49-012 Sy2 21 02 23.7765278760 -28 10 28.579411740   15.25   14.18   ~ 50 0
82 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 483 1
83 NGC 7212a Sy1 22 07 01.9870259424 +10 14 00.838175892   15.1       ~ 217 1
84 MCG-06-49-013 Sy2 22 42 33.3744506448 -37 11 07.566688788   15.061   14.051   ~ 48 0
85 NGC 7479 Sy2 23 04 56.6432243448 +12 19 22.357387020 11.74 11.60 10.85 10.47 9.66 ~ 783 2
86 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
87 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2

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