Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cooling of superfluid neutron stars with muons   We extend our modeling of cooling of superfluid neutron stars by including
the production of muons in the core, in addition to neutrons, protons, and
electrons. The results are confronted with observations of middle-aged isolated
NSs. Muons have little effect on the hydrostatic structure of NSs, on the slow
cooling of low-mass NSs (RX J0822--43 and PSR 1055--52 in our model) and on the
rapid cooling of massive NSs. They affect, however, the moderately fast cooling
of medium-mass NSs (1E 1207--52, RX J0002+62, PSR 0656+14, Vela, and Geminga)
and shift appreciably the mass range of these NSs to lower masses, which is
important for correct interpretation of the observations. Moreover, the effects
of muons can accurately be reproduced by a simple renormalization of NS models
with no muons in the NS cores.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom