AGN OBSCURATION THROUGH DUSTY, INFRARED-DOMINATED FLOWS. II. MULTIDIMENSIONAL, RADIATION-HYDRODYNAMICS MODELING

We explore a detailed model in which the active galactic nucleus (AGN) obscuration results from the extinction of AGN radiation in a global flow driven by the pressure of infrared radiation on dust grains. We assume that external illumination by UV and soft X-rays of the dusty gas located at approxi...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 747; no. 1; pp. 1 - 11
Main Authors DORODNITSYN, A, Kallman, T, Bisnovatyi-Kogan, G S
Format Journal Article
LanguageEnglish
Published United States 01.03.2012
Subjects
ACCELERATION
Active galactic nuclei
Approximation
APPROXIMATIONS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BLACK HOLES
COMPUTERIZED SIMULATION
Conversion
COSMOLOGICAL MODELS
COSMOLOGY
DUSTS
External pressure
GALAXIES
HYDRODYNAMICS
ILLUMINANCE
Illumination
INFRARED RADIATION
LUMINOSITY
Mathematical analysis
Simulation
SOFT X RADIATION
TIME DEPENDENCE
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Summary:We explore a detailed model in which the active galactic nucleus (AGN) obscuration results from the extinction of AGN radiation in a global flow driven by the pressure of infrared radiation on dust grains. We assume that external illumination by UV and soft X-rays of the dusty gas located at approximately 1 pc away from the supermassive black hole is followed by a conversion of such radiation into IR. Using 2.5D, time-dependent radiation-hydrodynamics simulations in a flux-limited diffusion approximation we find that the external illumination can support a geometrically thick obscuration via outflows driven by infrared radiation pressure in AGN with luminosities greater than 0.05 L sub(edd) and Compton optical depth, [tau] sub(T) [> ~] 1.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/747/1/8