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Connection between Mid-infrared Emission Properties and Narrow-line Region Outflows in Type 1 Active Galactic Nuclei

Zhang, Kai and Wang, Ting-Gui and Yan, Lin and Dong, Xiao-Bo (2013) Connection between Mid-infrared Emission Properties and Narrow-line Region Outflows in Type 1 Active Galactic Nuclei. Astrophysical Journal, 768 (1). Art. No. 22. ISSN 0004-637X. doi:10.1088/0004-637X/768/1/22.

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The location of warm dust producing the mid-infrared (MIR) emission in type 1 active galactic nuclei (AGNs) is complex and not yet fully known. We explore this problem by studying how the MIR covering factor (CF_(MIR) = L_(MIR)/L_(bol)) correlates with the fundamental parameters of AGN accretion process (such as L_(bol), black hole mass M_(BH), and Eddington ratio L/L_(Edd)) and the properties of narrow emission lines (as represented by [O III] λ5007), using large data sets derived from the Sloan Digital Sky Spectroscopic Survey (SDSS) and the Wide Infrared Sky Survey (WISE). First, we find that the luminosity of the [O III] wing component (L_(wing)) correlates more tightly with the continuum luminosity (λL_λ(5100)) than the luminosity of the line core component (L_(core)) does, which is in line with our previous conclusion that the wing component, generally blueshifted, originates from the polar outflows in the inner narrow-line region (NLR). We then find that the MIR CF shows the strongest correlation with L_(wing)/L_(bol) rather than with L_(core)/L_(bol) or the above fundamental AGN parameters, and the correlation becomes stronger as the infrared wavelength increases. We also confirm the anti-correlations of CF_(MIR) with L_(bol) and M_(BH), and the lack of dependence of CF_(MIR) on the Eddington ratio. These results suggest that a large fraction of the warm dust producing MIR emission in AGNs is likely embedded in polar outflows in the NLR instead of in the torus.

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Yan, Lin0000-0003-1710-9339
Additional Information:© 2013 American Astronomical Society. Received 2012 November 1; accepted 2013 March 8; published 2013 April 10. We thank the referee for helpful suggestions that improve the paper significantly. This work is supported by Chinese NSF grants NSFC 11233002, 11073019, and a Chinese Universities Scientific Fund (CUSF) for USTC. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This study makes use of data from the SDSS (see
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
National Science Foundation China11233002
National Science Foundation China11073019
Chinese Universities Scientific FundUNSPECIFIED
Subject Keywords:galaxies: kinematics and dynamics; galaxies: Seyfert; infrared: galaxies; quasars: emission lines
Issue or Number:1
Record Number:CaltechAUTHORS:20130603-111810148
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Official Citation:Connection between Mid-infrared Emission Properties and Narrow-line Region Outflows in Type 1 Active Galactic Nuclei Kai Zhang, Ting-Gui Wang, Lin Yan, and Xiao-Bo Dong doi:10.1088/0004-637X/768/1/22
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38757
Deposited By: Ruth Sustaita
Deposited On:04 Jun 2013 15:28
Last Modified:09 Nov 2021 23:39

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