Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Bottom Magnetic Fields of the Millisecond Pulsars   The magnetic field strengths of most millisecond pulsars(MSP) are about
$10^{8-9}$ Gauss. The accretion induced magnetic field evolution scenario here
concludes that the field decay is invesely related to the accreted mass and the
minimum field or bottom field stops at about $10^{8}$ Gauss if accreted with
the Eddington accretion rate, which is proportionally related with the
accretion rate as $\dot{M}^{1/2}$. The possibility of the low field $\sim
10^{7}$ Gauss MSPs has been proposed for the future radio observation.

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The categories of this paper are: chem-ph
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The categories of this paper are: eess
9
The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph