Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spinning gauged boson and Dirac stars: a comparative study   Scalar boson stars and Dirac stars are solitonic solutions of the
Einstein{Klein-Gordon and Einstein- Dirac classical equations, respectively.
Despite the different bosonic vs: fermionic nature of the matter field, these
solutions to the classical field equations have been shown to have
qualitatively similar features [1]. In particular, for spinning stars the most
fundamental configurations can be in both cases toroidal, unlike spinning Proca
stars that are spheroidal [2]. In this paper we gauge the scalar and Dirac
fields, by minimally coupling them to standard electromagnetism. We explore the
impact of the gauge coupling on the resulting solutions. One of the most
relevant difference concerns the gyromagnetic ratio, which for the scalar stars
takes values around 1, whereas for Dirac stars takes values around 2.

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The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
27
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: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
9
The categories of this paper are: nlin