Two New “Turn-off” Changing-look Active Galactic nuclei and Implication on “Partially Obscured” AGNs. (arXiv:1910.02392v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Wang_J/0/1/0/all/0/1">J. Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xu_D/0/1/0/all/0/1">D. W. Xu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_Y/0/1/0/all/0/1">Y. Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_J/0/1/0/all/0/1">J. B. Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zheng_J/0/1/0/all/0/1">J. Zheng</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wei_J/0/1/0/all/0/1">J. Y. Wei</a>

We here report a spectroscopic identification of two new changing-look AGNs
(CL-AGNs): SDSS,J104705.16+544405.8 and SDSS,J120447.91+170256.8 both with a
“turn-off” type transition from type 1 to type 1.8/1.9. The identification is
arrived by a follow-up spectroscopic observation of the five changing-look AGN
(CL-AGN) candidates that are extracted from the sample recently released in
Macleod et al. The candidates are extract by the authors from the Sloan Digit
Sky Survey Data Release 7 spectroscopically confirmed quasars with large
amplitude variability. By compiling a sample of 26 previously identified
CL-AGNs, we confirm the claim in Macleod et al. that CL-AGNs tend to be biased
against low Eddington ratio, and identify an overlap between the CL-AGNs at
their dim state and the so-called intermediate-type AGNs. The overlap implies
that there two populations of the intermediate-type AGNs with different
origins. One is due to the torus orientation effect, and the another the
intrinsic change of the accretion rate of the central supermassive blackholes.

We here report a spectroscopic identification of two new changing-look AGNs
(CL-AGNs): SDSS,J104705.16+544405.8 and SDSS,J120447.91+170256.8 both with a
“turn-off” type transition from type 1 to type 1.8/1.9. The identification is
arrived by a follow-up spectroscopic observation of the five changing-look AGN
(CL-AGN) candidates that are extracted from the sample recently released in
Macleod et al. The candidates are extract by the authors from the Sloan Digit
Sky Survey Data Release 7 spectroscopically confirmed quasars with large
amplitude variability. By compiling a sample of 26 previously identified
CL-AGNs, we confirm the claim in Macleod et al. that CL-AGNs tend to be biased
against low Eddington ratio, and identify an overlap between the CL-AGNs at
their dim state and the so-called intermediate-type AGNs. The overlap implies
that there two populations of the intermediate-type AGNs with different
origins. One is due to the torus orientation effect, and the another the
intrinsic change of the accretion rate of the central supermassive blackholes.

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