Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unification of BL Lac objects, FR I and FR II(G) radio galaxies and
  Doppler factor Estimation for BL Lac Objects   In this work, we collected a sample of BL Lacs, FR I and FR II(G) radio
galaxies with available core and extended emissions from published works to
discuss the unified schemes and estimate the Doppler factor for BL Lacs.
Wilcoxon rank-sum test and Kolmogorov-Smirnov test both suggest that the
probabilities for the distribution of the extended luminosity of BL Lacs and
that of FR I and FR II(G) radio galaxies to be from the same parent
distribution are $p_{\rm{WRS}}=0.779$ and $p_{\rm{K-S}}=0.326$, suggesting they
are unified. Based on this unified schemes, we propose to estimate the Doppler
factors for BL Lacs. Comparing the Doppler factor estimated by the
fitting/regression method with those for the common sources in the literatures,
we found a good linear correlation for common sources.

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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph