Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The BL Lac Object OJ 287: Exploring a Complete Spectrum of Issues
  Concerning Relativistic Jets and Accretion   The BL Lacertae object OJ 287 is one of the most dynamic blazars across the
directly accessible observational windows -- spectral, timing, polarization,
and imaging. In addition to behaviors considered characteristics of blazars, it
exhibits peculiar timing features like quasi periodicity in optical flux,
radio-detected knots position, and has shown diverse transient spectral
features like a spectral phase dominated by a new broadband emission component,
Seyfert-like soft-X-ray excess, iron line absorption, a thermal-like emission
dominated optical phase, large polarization swings associated with one of the
timing features, etc. that are rare in blazars and contrary to currently
prevailing view of BL Lacs. Theoretical considerations, supported by existing
observations, invoke scenarios involving a dynamical interplay of accretion
and/or strong-gravity-induced events (tidal forces) in a binary supermassive
black hole (SMBH) scenario to impact-induced jet and only jet activities. A few
of these models even make some definite and quite distinctive observationally
testable predictions. These considerations make OJ 287 the only
blazar/jetted-AGN to have an activity phase with dominance related to accretion
and/or accretion-perturbation-induced jet activities. We present a brief
overview of the unique spectral features and discuss the implications of these
features in exploring not only relativistic jet physics but issues from
accretion to accretion-regulated jet activities i.e. the whole spectrum of
issues related to the jet-accretion paradigm in jetted SMBH systems that have
not been possible so far due to jet emission shadowing other likely emission
features/components.

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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: cs
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The categories of this paper are: solv-int