Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact Relativistic Magnetized halos around Rotating Disks   The exact relativistic treatment of a rotating disk surrounded by a
magnetized material halo is presented. The features of the halo and disk are
described by the distributional energy-momentum tensor of a general fluid in
canonical form. All the relevant quantities and the metric and electromagnetic
potentials are exactly determined by an arbitrary harmonic function only. For
instance, the generalized Kuzmin-disk potential is used. The particular class
of solutions obtained is asymptotically flat and satisfies all the energy
conditions. Moreover, the motion of a charged particle on the halo is
described. As far as we know, this is the first relativistic model describing
analytically the magnetized halo of a rotating disk.

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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: comp-gas