2014A&A...565A..71L


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST02:21:54

2014A&A...565A..71L - Astronomy and Astrophysics, volume 565A, 71-71 (2014/5-1)

Revealing the large nuclear dust structures in NGC 1068 with MIDI/VLTI.

LOPEZ-GONZAGA N., JAFFE W., BURTSCHER L., TRISTRAM K.R.W. and MEISENHEIMER K.

Abstract (from CDS):

The aim of this paper is to understand the relation in active galactic nuclei (AGNs) between the small obscuring torus and dusty structures at larger scales (5-10 pc). The dusty structures in AGNs are best observed in the mid-infrared. To achieve the necessary spatial resolution (20-100 millarcsec) we use ESO's Mid-Infrared Interferometer (MIDI) with the 1.8 m Auxiliary Telescopes. We use the chromatic phases in the data to improve the spatial fidelity of the analysis. We present interferometric data for NGC 1068 obtained in 2007 and 2012. We find no evidence of source variability. Many (u,v) points show non-zero chromatic phases indicating significant asymmetries. Gaussian model fitting of the correlated fluxes and chromatic phases provides a three-component best fit with estimates of sizes, temperatures, and positions of the components. A large, warm, offcenter component is required at a distance approximately 90mas to the northwest at a position angle (PA) of ~-18°. The dust at 5-10pc in the polar region contributes four times more to the mid-infrared flux at 12µm than the dust located at the center. This dust may represent the inner wall of a dusty cone. If similar regions are heated by the direct radiation from the nucleus, then they will contribute substantially to the classification of many Seyfert galaxies as Type 2. Such a region is also consistent in other Seyfert galaxies (the Circinus galaxy, NGC 3783, and NGC 424).

Abstract Copyright:

Journal keyword(s): techniques: interferometric - galaxies: active - galaxies: nuclei - galaxies: Seyfert - galaxies: individual: NGC 1068 - radiation mechanisms: thermal

VizieR on-line data: <Available at CDS (J/A+A/565/A71): tableb.dat list.dat fits/*>

Simbad objects: 19

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Number of rows : 19

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 NGC 424 Sy2 01 11 27.6374462713 -38 05 00.404099901   13.76 14.12 12.38 12.8 ~ 268 0
2 * nu. Psc * 01 41 25.8939097 +05 29 15.406225 7.36 5.81 4.44 3.38 2.67 K3III 218 0
3 [EFK91] H Cld 02 42 40.675 -00 00 49.31           ~ 7 0
4 [DW98] 5 Cld 02 42 40.68 -00 00 47.5           ~ 17 0
5 [DW98] 3 Cld 02 42 40.71 -00 00 47.5           ~ 22 0
6 [EFK91] A Cld 02 42 40.71 -00 00 47.5           ~ 15 0
7 [DW98] 1 Cld 02 42 40.71 -00 00 47.1           ~ 20 0
8 [DW98] 4 Cld 02 42 40.711 -00 00 47.81           ~ 25 0
9 [DW98] 2 Cld 02 42 40.752 -00 00 47.40           ~ 16 0
10 [DW98] 6 Cld 02 42 40.758 -00 00 46.59           ~ 13 0
11 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 3983 2
12 * eta Eri PM* 02 56 25.6494839 -08 53 53.322099 5.97 4.99 3.87 3.08 2.50 K1+IIIb 176 0
13 ESO 434-40 Sy2 09 47 40.1345889569 -30 56 55.959492708   14.10 13.69 12.44   ~ 475 0
14 7C 095855.89+290131.00 Sy1 10 01 49.5226070599 +28 47 08.913353395   18.21 17.27     ~ 394 1
15 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1444 0
16 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3306 2
17 NGC 4507 Sy2 12 35 36.6328010225 -39 54 33.661858548   12.95 13.54 11.70 12.4 ~ 429 0
18 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3886 3
19 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 968 2

    Equat.    Gal    SGal    Ecl

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2019.10.18-02:21:54

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