Misclassified type 1 AGNs in the local universe
Jong-Hak Woo, Ji-Gang Kim, Daeseong Park, Hyun-Jin Bae, Jae-Hyuk Kim,, Seung-Eun Lee, Sang Chul Kim, Hong-Jin Kwon

TL;DR
This study identifies a small but significant population of misclassified type 1 AGNs within type 2 AGNs in the local universe, revealing their properties and implications for AGN demographics.
Contribution
It provides the first systematic search for misclassified type 1 AGNs among local type 2 AGNs using SDSS data, highlighting their prevalence and characteristics.
Findings
Misclassified type 1 AGNs constitute about 3.5% of type 2 AGNs.
These AGNs have low luminosity and weak accretion activity.
Significant velocity offsets in ext{O III} lines suggest outflows.
Abstract
We search for misclassified type 1 AGNs among type 2 AGNs identified with emission line flux ratios, and investigate the properties of the sample. Using 4\,113 local type 2 AGNs at selected from Sloan Digital Sky Survey Data Release 7, we detected a broad component of the \Ha\ line with a Full-Width at Half-Maximum (FWHM) ranging from 1\,700 to 19\,090 \kms\ for 142 objects, based on the spectral decomposition and visual inspection. The fraction of the misclassified type 1 AGNs among type 2 AGN sample is 3.5%, implying that a large number of missing type 1 AGN population may exist. The misclassified type 1 AGNs have relatively low luminosity with a mean broad \Ha\ luminosity, log L \ergs, while black hole mass of the sample is comparable to that of the local black hole population, with a mean black hole mass, log M…
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