Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-term variability of the composite galaxy SDSS J103911-000057: A
  candidate of true Type-2 AGN   In the manuscript, the composite galaxy SDSS J103911-000057 (=SDSS J1039) is
reported as a better candidate of true Type-2 AGN without hidden BLRs. None
broad but only narrow emission lines detected in SDSS J1039 can be well
confirmed both by the F-test technique and by the expected broad emission lines
with EW smaller than 13.5\AA~ with 99\% confidence level. Meanwhile, a reliable
AGN power law component is preferred with confidence level higher than 7sigma
in SDSS J1039. Furthermore, the long-term variability of SDSS J1039 from CSS
can be well described by the DRW process with intrinsic variability timescale
$\tau\sim100{\rm days}$, similar as normal quasars. And, based on BH mass in
SDSS J1039 through the msig relation and on the correlation between AGN
continuum luminosity and total H$\alpha$ luminosity, the expected broad
H$\alpha$, if there was, could be re-constructed with line width about
$300-1000{\rm km~s^{-1}}$ and with line flux about $666\times10^{-17}{\rm
erg~s^{-1}~cm^{-2}}$ under the Virialization assumption to BLRs, providing
robust evidence to reject the probability that the intrinsic probable broad
H$\alpha$ were overwhelmed by noises of the SDSS spectrum in SDSS J1039.
Moreover, the SDSS J1039 does follow the same correlation between continuum
luminosity and [O~{\sc iii}] line luminosity as the one for normal broad line
AGN, indicating SDSS J1039 classified as a changing-look AGN at dim state can
be well ruled out. Therefore, under the current knowledge, SDSS J1039 is a
better candidate of true Type-2 AGN.

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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: cs