Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-term radio and X-ray evolution of the tidal disruption event
  ASASSN-14li   We report on late time radio and X-ray observations of the tidal disruption
event candidate ASASSN-14li, covering the first 1000 days of the decay phase.
For the first $\sim200$ days the radio and X-ray emission fade in concert. This
phase is better fit by an exponential decay at X-ray wavelengths, while the
radio emission is well described by either an exponential or the canonical
$t^{-5/3}$ decay assumed for tidal disruption events. The correlation between
radio and X-ray emission during this period can be fit as $L_{R}\propto
L_{X}^{1.9\pm0.2}$. After 400 days the radio emission at $15.5\,\textrm{GHz}$
has reached a plateau level of $244\pm8\,\mu\textrm{Jy}$ which it maintains for
at least the next 600 days, while the X-ray emission continues to fade
exponentially. This steady level of radio emission is likely due to relic radio
lobes from the weak AGN-like activity implied by historical radio observations.
We note that while most existing models are based upon the evolution of ejecta
which are decoupled from the central black hole, the radio : X-ray correlation
during the declining phase is also consistent with core jet emission coupled to
a radiatively efficient accretion flow.

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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an