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A systematic search for hidden type 1 AGNs: gas kinematics and scaling relations | | Da-In Eun
; Jong-Hak Woo
; Hyun-Jin Bae
; | | Date: |
27 Mar 2017 | | Abstract: | We search type 1 AGNs among emission-line galaxies, that are typically
classified as type 2 AGNs based on emission line flux ratios if a broad
component in the H$alpha$ line profile is not properly investigated. Using
~24,000 type 2 AGNs at z $<$0.1 initially selected from Sloan Digital Sky
Survey Data Release 7 by Bae, et al. 2014, we identify a sample of 611 type 1
AGNs based on the spectral fitting results and visual inspection. These hidden
type 1 AGNs have relatively low luminosity with a mean broad Ha luminosity,
log L$_{
m Halpha }$ $=$ 40.73$pm$0.32 ergs, and low Eddington ratio with
a mean log L$_{bol}$/L$_{
m Edd}$ $=$ -2.04$pm$0.34, while they do follow the
black hole mass - stellar velocity dispersion relation defined by the inactive
galaxies and the reverberation-mapped type 1 AGNs. We investigate ionized gas
outflows based on the [OIII] $lambda$5007 kinematics, which show relatively
high velocity dispersion and velocity shift, indicating that the line-of-sight
velocity and velocity dispersion of the ionized gas in type 1 AGNs is on
average larger than that of type 2 AGNs. | | Source: | arXiv, 1703.8901 | | Services: | Forum | Review | PDF | Favorites | |
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