Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal Evolution of Neutron Stars as a Probe of Physics beyond the
  Standard Model   Thermal evolution of neutron stars (NSs) is studied as a probe of physics
beyond the standard model. We first review the standard cooling theory of NSs
in detail, with an emphasis on the roles of nucleon superfluidity. Then we
discuss non-standard evolution with axion and dark matter (DM); axion
production enhances the cooling while DM accretion leads to heating of NSs. To
evaluate the effect of DM heating, we need to compare it to the rotochemical
heating, which is caused by the out-of-equilibrium beta processes in a NS. In
the dissertation, we also investigate the rotochemical heating in the presence
of both neutron and proton superfluidity.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an