2015A&A...583A.120S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:04:05

2015A&A...583A.120S - Astronomy and Astrophysics, volume 583A, 120-120 (2015/11-1)

Self-consistent two-phase AGN torus models. SED library for observers.

SIEBENMORGEN R., HEYMANN F. and EFSTATHIOU A.

Abstract (from CDS):

We assume that dust near active galactic nuclei (AGNs) is distributed in a torus-like geometry, which can be described as a clumpy medium or a homogeneous disk, or as a combination of the two (i.e. a two-phase medium). The dust particles considered are fluffy and have higher submillimeter emissivities than grains in the diffuse interstellar medium. The dust-photon interaction is treated in a fully self-consistent three-dimensional radiative transfer code. We provide an AGN library of spectral energy distributions (SEDs). Its purpose is to quickly obtain estimates of the basic parameters of the AGNs, such as the intrinsic luminosity of the central source, the viewing angle, the inner radius, the volume filling factor and optical depth of the clouds, and the optical depth of the disk midplane, and to predict the flux at yet unobserved wavelengths. The procedure is simple and consists of finding an element in the library that matches the observations. We discuss the general properties of the models and in particular the 10µm silicate band. The AGN library accounts well for the observed scatter of the feature strengths and wavelengths of the peak emission. AGN extinction curves are discussed and we find that there is no direct one-to-one link between the observed extinction and the wavelength dependence of the dust cross sections. We show that objects in the library cover the observed range of mid-infrared colors of known AGNs. The validity of the approach is demonstrated by matching the SEDs of a number of representative objects: Four Seyferts and two quasars for which we present new Herschel photometry, two radio galaxies, and one hyperluminous infrared galaxy. Strikingly, for the five luminous objects we find that pure AGN models fit the SED without needing to postulate starburst activity.

Abstract Copyright:

Journal keyword(s): quasars: general - radiative transfer - infrared: galaxies - galaxies: Seyfert - methods: numerical

VizieR on-line data: <Available at CDS (J/A+A/583/A120): list.dat sedlib/*>

Simbad objects: 16

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Number of rows : 16

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 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 307 0
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4093 2
3 Mrk 1066 Sy2 02 59 58.5970307633 +36 49 13.808979663   14.89 13.96     ~ 319 1
4 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1524 2
5 NGC 1386 GiP 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 460 1
6 NGC 1566 Sy1 04 20 00.4020009055 -54 56 16.578104141 10.29 10.19 9.73 9.21 10.1 ~ 718 2
7 NGC 3081 Sy2 09 59 29.5436045645 -22 49 34.748021329   13.06 13.55 11.67 12.1 ~ 412 0
8 [VV96] J102434.5+470911 Sy1 10 24 34.5 +47 09 11     20.5     ~ 475 0
9 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 315 0
10 7C 110025.60+771511.00 Sy1 11 04 13.8613944317 +76 58 58.192391742   15.70 15.72 15.40   ~ 510 1
11 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3380 2
12 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 452 0
13 3C 324.0 Sy1 15 49 48.9 +21 25 38   21.5       ~ 300 0
14 6C 170404+604844 Sy1 17 04 41.3742389551 +60 44 30.522600868   15.65 15.40 15.30   ~ 723 1
15 3C 356 QSO 17 24 20.2 +50 57 14   21.5 21.5     ~ 216 1
16 NGC 7213 Sy1 22 09 16.2106632887 -47 10 00.082166299   10.97 12.08 10.50 10.6 ~ 596 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-19:04:05

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