Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray Flares Raising upon Magnetar Plateau as an Implication of a
  Surrounding Disk of Newborn Magnetized Neutron Star   The X-ray flares have usually been ascribed to long-lasting activities of the
central engine of gamma-ray bursts (GRBs), e.g., fallback accretion. The GRB
X-ray plateaus, however, favor a millisecond magnetar central engine. The
fallback accretion can be significantly suppressed due to the propeller effect
of a magnetar. Therefore, if the propeller regime cannot resist the mass flow
onto the surface of the magnetar efficiently, the X-ray flares raise upon the
magnetar plateau would be hinted. In this work, such peculiar cases are
connected to the accretion process of a magnetar, and an implication for
magnetar-disc structure is given. We investigate the repeating accretion
process with multi-flare GRB 050730, and give a discussion for the accreting
induced variation of the magnetic field in GRB 111209A. Two or more flares
exhibit in the GRB 050730, GRB 060607A, and GRB 140304A; by adopting magnetar
mass $M=1.4~ M_\odot$ and radius $R=12~\rm km$, the average mass flow rates of
the corresponding surrounding disk are $3.53\times 10^{-4}~M_\odot~\rm s^{-1}$,
$4.23\times 10^{-4}~M_\odot~\rm s^{-1}$, and $4.33\times 10^{-4}~M_\odot~\rm
s^{-1}$, and the corresponding average sizes of the magnetosphere are $5.01~\rm
\times10^{6} cm$, $6.45~\rm \times10^{6} cm$, and $1.09~\rm \times10^{7} cm$,
respectively. A statistic analysis that contains 8 GRBs within 12 flares shows
that the total mass loading in single flare is $\sim 2\times
10^{-5}~M_{\odot}$. In the lost mass of a disk, there are about 0.1% used to
feed a collimated jet.

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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg