Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The neutron star in Cassiopeia A: equation of state, superfluidity, and
  Joule heating   The thermomagnetic evolution of the young neutron star in Cassiopea A is
studied by considering fast neutrino emission processes. In particular, we
consider neutron star models obtained from the equation of state computed in
the framework of the Brueckner-Bethe-Goldstone many-body theory and variational
methods, and models obtained with the Akmal-Pandharipande-Ravenhall equation of
state. It is shown that it is possible to explain a fast cooling regime as the
one observed in the neutron star in Cassiopea A if the Joule heating produced
by dissipation of the small-scale magnetic field in the crust is taken into
account. We thus argue that it is difficult to put severe constraints on the
superfluid gap if the Joule heating is considered.

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The categories of this paper are: hep-ph
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The categories of this paper are: econ
32
The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: stat
27
The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol