Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disordered nuclear pasta, magnetic field decay, and crust cooling in
  neutron stars   Nuclear pasta, with non-spherical shapes, is expected near the base of the
crust in neutron stars. Large scale molecular dynamics simulations of pasta
show long lived topological defects that could increase electron scattering and
reduce both the thermal and electrical conductivities. We model a possible low
conductivity pasta layer by increasing an impurity parameter Q_{imp}.
Predictions of light curves for the low mass X-ray binary MXB 1659-29, assuming
a large Q_{imp}, find continued late time cooling that is consistent with
Chandra observations. The electrical and thermal conductivities are likely
related. Therefore observations of late time crust cooling can provide insight
on the electrical conductivity and the possible decay of neutron star magnetic
fields (assuming these are supported by currents in the crust).

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The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex