2013A&A...558A.149B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:59:30

2013A&A...558A.149B - Astronomy and Astrophysics, volume 558A, 149-149 (2013/10-1)

A diversity of dusty AGN tori. Data release for the VLTI/MIDI AGN large program and first results for 23 galaxies.

BURTSCHER L., MEISENHEIMER K., TRISTRAM K.R.W., JAFFE W., HOENIG S.F., DAVIES R.I., KISHIMOTO M., POTT J.-U., ROETTGERING H., SCHARTMANN M., WEIGELT G. and WOLF S.

Abstract (from CDS):

The AGN-heated dust distribution (the ``torus'') is increasingly recognized not only as the absorber required in unifying models, but as a tracer for the reservoir that feeds the nuclear super-massive black hole. Yet, even its most basic structural properties (such as its extent, geometry and elongation) are unknown for all but a few archetypal objects. In order to understand how the properties of AGN tori are related to feeding and obscuration, we need to resolve the matter distribution on parsec scales. Since most AGNs are unresolved in the mid-IR, even with the largest telescopes, we utilize the MID-infrared interferometric Instrument (MIDI) at the Very Large Telescope Interferometer (VLTI) that is sensitive to structures as small as a few milli-arcseconds (mas). We present here an extensive amount of new interferometric observations from the MIDI AGN Large Program (2009-2011) and add data from the archive to give a complete view of the existing MIDI observations of AGNs. Additionally, we have obtained high-quality mid-IR spectra from VLT/VISIR to provide a precise total flux reference for the interferometric data. We present correlated and total fluxes for 23 AGNs (16 of which with new data) and derive flux and size estimates at 12µm using simple axisymmetric geometrical models. Perhaps the most surprising result is the relatively high level of unresolved flux and its large scatter: The median ``point source fraction'' is 70% for type 1 and 47 % for type 2 AGNs meaning that a large part of the flux is concentrated on scales <5 mas (0.1-10 pc). Among sources observed with similar spatial resolution, it varies from 20%-100%. For 18 of the sources, two nuclear components can be distinguished in the radial fits. While these models provide good fits to all but the brightest sources, significant elongations are detected in eight sources. The half-light radii of the fainter sources are smaller than expected from the size ∝L0.5 scaling of the bright sources and show a large scatter, especially when compared to the relatively tight size-luminosity relation in the near-infrared. It is likely that a common ``size-luminosity'' relation does not exist for AGN tori, but that they are dominated by intrinsic differences in their dust structures. Variations in the relative contribution of extended dust in the narrow line region or heated by star formation vs. compact AGN-heated dust and non-thermal emission also have to be taken into account.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - galaxies: active - galaxies: nuclei - galaxies: Seyfert - infrared: galaxies - techniques: high angular resolution

VizieR on-line data: <Available at CDS (J/A+A/558/A149): table1.dat tablea2.dat log.dat fits/* log/*>

Simbad objects: 39

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Number of rows : 39

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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2931 2
2 Mrk 1502 Sy1 00 53 34.9326560879 +12 41 35.927159668   14.41 14.03     ~ 1036 1
3 NGC 424 Sy2 01 11 27.6374462713 -38 05 00.404099901   13.76 14.12 12.38 12.8 ~ 274 0
4 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4093 2
5 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1524 2
6 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1841 2
7 Mrk 1095 Sy1 05 16 11.4093760763 -00 08 59.158774578   14.30 13.92     ~ 776 1
8 2MASX J05210136-2521450 Sy2 05 21 01.3987198411 -25 21 45.269338983   15.47 14.75     ~ 427 0
9 2MASX J05580206-3820043 Sy1 05 58 02.0566732230 -38 20 04.453517461   16.05 14.98 11.6   ~ 203 1
10 [VV96] J091609.5-621929 Sy1 09 16 09.3662174299 -62 19 29.559790552   12.51 12.26 11.5   ~ 105 0
11 ESO 434-40 Sy2 09 47 40.1345889569 -30 56 55.959492708   14.10 13.69 12.44   ~ 487 0
12 Mrk 1239 Sy1 09 52 19.168 -01 36 44.10   14.99 14.39 11.2   ~ 288 0
13 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1533 2
14 NGC 3256 IG 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 755 2
15 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 315 0
16 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1487 0
17 2E 2584 Sy1 12 04 42.1097577213 +27 54 11.867990165   15.64 15.60     ~ 351 0
18 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3380 2
19 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5320 1
20 NGC 4507 Sy2 12 35 36.6328010225 -39 54 33.661858548   12.95 13.54 11.70 12.4 ~ 438 0
21 NGC 4593 Sy1 12 39 39.4435521178 -05 20 39.035028119   13.95 13.15     ~ 950 0
22 IC 3639 Sy2 12 40 52.8357581136 -36 45 21.046225445   13.01 13.50 11.87 12.7 ~ 228 1
23 ESO 323-77 Sy2 13 06 26.1213873662 -40 24 52.594127368   13.58 13.42 12.01   ~ 189 0
24 MCG-03-34-064 Sy2 13 22 24.485 -16 43 42.09   14   13.16   ~ 260 2
25 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3999 3
26 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1379 0
27 2RE J1337+244 Sy1 13 37 18.7198121988 +24 23 03.320690345     15.0     ~ 358 0
28 IC 4329 BiC 13 49 05.314 -30 17 45.20   11.96 11.54 10.31   ~ 179 2
29 Mrk 463E Sy2 13 56 02.886 +18 22 18.84   15.01 14.22     ~ 139 1
30 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1008 2
31 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 992 0
32 NGC 5995 Sy2 15 48 24.9486951203 -13 45 27.258674402   14.66 13.69 13.17   ~ 129 0
33 ESO 138-1 Sy2 16 51 20.2687785665 -59 14 04.287486933   14.35 13.63 13.02   ~ 109 0
34 FRL 49 Sy2 18 36 58.2344504326 -59 24 08.288330694   11.1   14.19   ~ 209 0
35 ESO 140-43 Sy1 18 44 53.9893682398 -62 21 52.871742814   14.14 14.10 12.94 13.1 ~ 212 0
36 IC 5063 Sy2 20 52 02.329 -57 04 07.60   12.92 13.60 11.30   ~ 545 1
37 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1888 3
38 NGC 7479 Sy2 23 04 56.668 +12 19 22.36 11.74 11.60 10.85 10.47 9.66 ~ 665 2
39 NGC 7582 GiP 23 18 23.621 -42 22 14.06 11.62 10.92 10.62     ~ 798 2

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2020.07.14-19:59:30

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