The entrainment matrix of a superfluid neutron-proton mixture at a finite temperature

Details The entrainment matrix of a superfluid neutron-proton mixture at a finite temperature The entrainment matrix of a superfluid neutron-proton mixture at a finite temperature

2005-08-03

arxiv.org/abs/astro-ph/0508104v1

Nucl.Phys. A761 (2005) 333-348

Astronomy and Astrophysics

Astrophysics

19 pages, 1 figure

Scientific paper

10.1016/j.nuclphysa.2005.07.005

The entrainment matrix (also termed the Andreev-Bashkin matrix or the mass-density matrix) for a neutron-proton mixture is derived at a finite temperature in a neutron star core. The calculation is performed in the frame of the Landau Fermi-liquid theory generalized to account for superfluidity of nucleons. It is shown, that the temperature dependence of the entrainment matrix is described by a universal function independent on an actual model of nucleon-nucleon interaction employed. The results are presented in the form convenient for their practical use. The entrainment matrix is important, e.g., in kinetics of superfluid nucleon mixtures or in studies of the dynamical evolution of neutron stars (in particular, in the studies of star pulsations and pulsar glitches).

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