2007A&A...473..369H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:46:28

2007A&A...473..369H - Astronomy and Astrophysics, volume 473, 369-376 (2007/10-2)

VISIR/VLT mid-infrared imaging of Seyfert nuclei: nuclear dust emission and the Seyfert-2 dichotomy.

HAAS M., SIEBENMORGEN R., PANTIN E., HORST H., SMETTE A., KAEUFL H.-U., LAGAGE P.-O. and CHINI R.

Abstract (from CDS):

Half of the Seyfert-2 galaxies escaped detection of broad lines in their polarised spectra observed so far. Some authors have suspected that these non-HBLRs contain real Sy2 nuclei without intrinsic broad line region hidden behind a dust torus. If this were true, then their nuclear structure would fundamentally differ from that of Sy2s with polarised broad lines: in particular, they would not be explained by orientation-based AGN unification. Further arguments for two physically different Sy2 populations have been derived from the warm and cool IRAS F25/F60 ratios. These ratios, however, refer to the entire host galaxies and are unsuitable to conclusively establish the absence of a nuclear dust torus. Instead, a study of the Seyfert-2 dichotomy should be performed on the basis of nuclear properties only. Here we present the first comparison between [OIII]λ5007Å and mid-infrared imaging at matching spatial resolution. The aim is to check whether the nuclear dust emission scales with AGN luminosity as traced by [OIII]. During the scientific verification phase of the VISIR instrument at the ESO Very Large Telescope we observed 16 Sy1 and Sy2 nuclei at 11.25µm with 0.35" spatial resolution (FWHM). We supplement our observations with high-resolution 10-12µm literature data of 58 Seyfert galaxies, for which spectroscopic or spectropolarimetric information and far-infrared data are available. Twelve of the 15 detected sources are unresolved and three sources show a dominant unresolved core surrounded by some faint knots in an area smaller than 1-2" radius. Our VISIR photometry agrees to better than 15% with published data obtained at 1.5"-5" spatial resolution. Exploring the Seyfert-2 dichotomy we find that the distributions of nuclear mid-infrared/[OIII] luminosity ratios are indistinguishable for Sy1s and Sy2s with and without detected polarised broad lines and irrespective of having warm or cool IRAS F25/F60 ratios. We find no evidence for the existence of a population of real Sy2s with a deficit of nuclear dust emission. Our results suggest 1) that all Seyfert nuclei possess the same physical structure including the putative dust torus and 2) that the cool IRAS colours are caused by a low contrast of AGN to host galaxy. Then the Seyfert-2 dichotomy is explained in part by unification of non-HBLRs with narrow-line Sy1s and to a larger rate by observational biases caused by a low AGN/host contrast and/or an unfavourable scattering geometry.

Abstract Copyright:

Journal keyword(s): galaxies: nuclei - galaxies: active - galaxies: Seyfert - infrared: galaxies

VizieR on-line data: <Available at CDS (J/A+A/473/369): table3.dat refs.dat>

Simbad objects: 107

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Number of rows : 107

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 Mrk 334 Sy1 00 03 09.6101278378 +21 57 36.952809317   15.30 14.62     ~ 185 0
2 Mrk 335 Sy1 00 06 19.5371542746 +20 12 10.617456059   14.19 13.85     ~ 1091 0
3 NGC 262 Sy2 00 48 47.1414900 +31 57 25.083955 14.04 13.90 13.06 8.53   ~ 672 3
4 2MASX J00535615-7038045 Sy2 00 53 56.152 -70 38 04.58   17.22 16.2 16.14   ~ 81 0
5 NGC 424 Sy2 01 11 27.6374462713 -38 05 00.404099901   13.76 14.12 12.38 12.8 ~ 273 0
6 NGC 513 Sy2 01 24 26.8055185286 +33 47 58.225286599   13.4 13.40     ~ 157 2
7 Mrk 993 Sy1 01 25 31.4568120260 +32 08 10.482711487   15.01 13.96     ~ 194 0
8 Mrk 573 Sy2 01 43 57.7763654544 +02 20 59.525472345   14.90 14.07     ~ 483 0
9 ICRF J015002.6-072548 Sy2 01 50 02.6969570114 -07 25 48.474391488   16.86 15.62 15.62   ~ 137 0
10 UGC 1395 Sy2 01 55 22.0257859119 +06 36 42.420261612   14.449 13.619 13.090 12.381 ~ 133 0
11 NGC 863 Sy1 02 14 33.5610949475 -00 46 00.180128181   14.48 13.81 17.9   ~ 571 0
12 NGC 931 Sy1 02 28 14.4690482478 +31 18 41.467674278   15.71 14.74     ~ 352 0
13 NGC 985 Sy1 02 34 37.882 -08 47 17.02   14.64 14.28 12.9   ~ 345 0
14 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4089 2
15 MCG-02-08-039 Sy2 03 00 30.6257296009 -11 24 57.016279252   14 14.3 13.45   ~ 96 0
16 NGC 1241 Sy2 03 11 14.636 -08 55 19.70 12.07 12.84 11.99 12.7 12.5 ~ 192 2
17 NGC 1320 Sy2 03 24 48.6903707574 -03 02 32.121207374   14.0 14.00     ~ 233 0
18 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1523 2
19 NGC 1386 GiP 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 458 1
20 6dFGS gJ033833.6-163219 Sy2 03 38 33.5517374417 -16 32 18.249749590   17.67 16.39 17.04   ~ 48 0
21 IRAS 03450+0055 Sy1 03 47 40.1887172045 +01 05 14.046919358   15.09 14.64     ~ 73 0
22 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1840 2
23 Mrk 618 Sy1 04 36 22.2984932129 -10 22 33.987352636   15.08 14.51 10.7   ~ 222 0
24 NGC 1667 Sy2 04 48 37.205 -06 19 11.47   13.66 12.86 11.72   ~ 335 1
25 2MASX J05210136-2521450 Sy2 05 21 01.3987198411 -25 21 45.269338983   15.47 14.75     ~ 426 0
26 NGC 2110 Sy2 05 52 11.3760694860 -07 27 22.489931610   14.77 13.51 11.86   ~ 582 1
27 Mrk 3 Sy2 06 15 36.458 +71 02 15.24 14.21 14.03 12.97     ~ 842 3
28 NGC 2273 Sy2 06 50 08.6724567505 +60 50 44.879789544   14.50 13.54     ~ 458 3
29 Mrk 9 Sy1 07 36 57.0265515252 +58 46 13.431867389   14.77 14.37     ~ 216 0
30 Mrk 79 Sy1 07 42 32.8212778143 +49 48 34.787882233   14.74 14.27     ~ 632 1
31 NGC 2639 Sy1 08 43 38.093 +50 12 19.94 12.90 12.56 11.65     ~ 382 2
32 Mrk 704 Sy1 09 18 25.9973268093 +16 18 19.630187097   14.82 14.20     ~ 237 0
33 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 785 3
34 Mrk 1239 Sy1 09 52 19.168 -01 36 44.10   14.99 14.39 11.2   ~ 287 0
35 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 3962 5
36 NGC 3081 Sy2 09 59 29.5436045645 -22 49 34.748021329   13.06 13.55 11.67 12.1 ~ 411 0
37 NGC 3080 Sy1 09 59 55.8477148005 +13 02 37.763196746   16.66 16.36     ~ 116 0
38 NGC 3185 GiP 10 17 38.5632620545 +21 41 17.601414448   12.99 12.17 12.37   ~ 257 1
39 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1530 2
40 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 313 0
41 NGC 3362 Sy2 10 44 51.7309570891 +06 35 48.664200380   17.58 16.96     ~ 145 0
42 UGC 6100 Sy2 11 01 33.9655833698 +45 39 13.940147885   14.1       ~ 106 0
43 NGC 3516 Sy1 11 06 47.4596406816 +72 34 07.189563769   13.12 12.40     ~ 1417 0
44 NGC 3660 Sy2 11 23 32.2791583222 -08 39 30.755681618   15.34 14.45     ~ 163 0
45 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1486 0
46 APG 294 GrG 11 39.7 +31 55           ~ 260 0
47 NGC 3786 GiP 11 39 42.5135441867 +31 54 33.955263276   14.62 13.74     ~ 357 1
48 NGC 3982 Sy1 11 56 28.169 +55 07 31.30   12.20 11.70 11.18   ~ 487 1
49 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 1991 1
50 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3379 2
51 NGC 4235 Sy1 12 17 09.8844228368 +07 11 29.665090752   14.70 13.60     ~ 363 0
52 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 930 1
53 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1183 2
54 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6207 3
55 M 88 Sy2 12 31 59.216 +14 25 13.48   14.33 13.18     ~ 727 1
56 NGC 4507 Sy2 12 35 36.6328010225 -39 54 33.661858548   12.95 13.54 11.70 12.4 ~ 437 0
57 NGC 4593 Sy1 12 39 39.4435521178 -05 20 39.035028119   13.95 13.15     ~ 948 0
58 NGC 4968 Sy2 13 07 05.976 -23 40 37.34   13.78 14.79 12.46   ~ 163 1
59 NGC 5033 Sy1 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 795 3
60 MCG-03-34-064 Sy2 13 22 24.485 -16 43 42.09   14   13.16   ~ 259 2
61 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3995 3
62 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 423 1
63 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3781 4
64 Mrk 789 AGN 13 32 24.240 +11 06 22.59   15.41 14.87     ~ 105 0
65 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1378 0
66 NGC 5252 Sy2 13 38 15.8711551761 +04 32 33.525903711   15.21 14.21     ~ 419 0
67 NGC 5256 PaG 13 38 17.8 +48 16 41   14.1 13.42     ~ 396 2
68 NGC 5283 Sy2 13 41 05.7487638040 +67 40 19.995794737   14.97 14.05     ~ 226 0
69 NGC 5273 Sy1 13 42 08.386 +35 39 15.26   14.01 13.12     ~ 402 0
70 Mrk 279 Sy1 13 53 03.4356451470 +69 18 29.410672989   15.15 14.46     ~ 693 0
71 NGC 5347 Sy2 13 53 17.7993659226 +33 29 26.989049245   13.46 12.70     ~ 310 1
72 Mrk 463E Sy2 13 56 02.886 +18 22 18.84   15.01 14.22     ~ 139 1
73 APG 271 IG 14 03 25.45 -06 02 59.9           ~ 207 0
74 NGC 5427 GiP 14 03 26.0408351752 -06 01 50.688001474   14.67 13.96 11.54   ~ 268 0
75 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1007 2
76 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 990 0
77 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2391 0
78 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 450 0
79 NGC 5674 Sy1 14 33 52.2776026548 +05 27 30.148203094   13.7 13.70     ~ 150 0
80 Mrk 817 Sy1 14 36 22.0820075123 +58 47 39.395406826   14.19 13.79     ~ 423 0
81 NGC 5695 Sy2 14 37 22.1345295094 +36 34 04.194112119   14.55 13.60     ~ 191 0
82 Mrk 841 Sy1 15 04 01.1935077982 +10 26 15.778741853   14.50 14.27     ~ 583 0
83 NGC 5929 GiP 15 26 06.158 +41 40 14.40   13.0 14.00     ~ 414 0
84 NGC 5930 GiP 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 411 0
85 NGC 5940 Sy1 15 31 18.0815014693 +07 27 27.839630255   15.56 14.90     ~ 168 0
86 NGC 5953 GiP 15 34 32.402 +15 11 37.80   13.23 12.45     ~ 336 1
87 NGC 5995 Sy2 15 48 24.9486951203 -13 45 27.258674402   14.66 13.69 13.17   ~ 128 0
88 NGC 6104 Sy1 16 16 30.6749775288 +35 42 28.959111583   18.17 17.35     ~ 114 0
89 ESO 141-55 Sy1 19 21 14.1471805047 -58 40 12.981632705   14.36 13.64 13.28   ~ 319 0
90 NGC 6814 Sy1 19 42 40.5857305428 -10 19 25.102133898   15.33 14.21 11.7 11.3 ~ 720 0
91 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1128 0
92 IC 5063 Sy2 20 52 02.329 -57 04 07.60   12.92 13.60 11.30   ~ 543 1
93 UGC 11680 Sy2 21 07 44.1 +03 52 31           ~ 87 0
94 Mrk 897 AGN 21 07 45.894 +03 52 39.50   15.39 14.76     ~ 93 1
95 Mrk 1513 Sy1 21 32 27.8163185343 +10 08 19.250705656   14.92 14.64     ~ 538 0
96 NGC 7130 AGN 21 48 19.490 -34 57 04.73   12.86 13.87 11.57   ~ 381 0
97 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15   ~ 465 1
98 2MASX J22041914+0333511 Sy2 22 04 19.1625821959 +03 33 51.257898401     15.4     ~ 68 0
99 NGC 7213 Sy1 22 09 16.2106632887 -47 10 00.082166299   10.97 12.08 10.50 10.6 ~ 595 0
100 NGC 7314 Sy1 22 35 46.1969940596 -26 03 01.574026329   11.62 13.11 10.61 11.4 ~ 504 0
101 UGC 12138 Sy1 22 40 17.0607019206 +08 03 13.518117435   15.30 14.45     ~ 150 0
102 NGC 7465 GiP 23 02 00.952 +15 57 53.55   13.3       ~ 258 0
103 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1885 3
104 NGC 7582 GiP 23 18 23.621 -42 22 14.06 11.62 10.92 10.62     ~ 796 2
105 NGC 7603 Sy1 23 18 56.6537061537 +00 14 37.974617713   14.73 14.01     ~ 355 0
106 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 635 4
107 NGC 7682 Sy2 23 29 03.896 +03 32 00.00   14.3       ~ 203 0

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2020.07.05-06:46:28

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