Entrainment parameters in a cold superfluid neutron star core
- Copernicus Astronomical Center, Polish Academy of Science, ul. Bartycka 18, PL-00-716 Warsaw (Poland)
Hydrodynamic simulations of neutron star cores that are based on a two-fluid description in terms of a neutron-proton superfluid mixture require the knowledge of the Andreev-Bashkin entrainment matrix which relates the momentum of one constituent to the currents of both constituents. This matrix is derived for arbitrary nuclear asymmetry at zero temperature and in the limits of small relative currents in the framework of the energy density functional theory. The Skyrme energy density functional is considered as a particular case. General analytic formulas for the entrainment parameters and various corresponding effective masses are obtained. These formulas are applied to the liquid core of a neutron star composed of homogeneous plasma of nucleons, electrons, and possibly muons in {beta} equilibrium.
- OSTI ID:
- 20771496
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevC.73.045802; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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