The entrainment matrix of superfluid nucleon-hyperon mixture

E. M. Kantor, M. E. Gusakov
Ioffe Physical-Technical Institute, St.Petersburg 194021, Russia

P. Haensel
N. Copernicus Astronimical Center, Bartycka 18, 00-716 Warsaw, Poland

We calculated the entrainment matrix, the important parameter of hydrodynamics of superfluid mixtures, for the matter of inner layers of neutron stars composed of nucleons (neutrons and protons), hyperons (lambda and sigma), as well as electrons and muons. In the approximation of zero temperature the calculation was made using the relativistic mean field sigma-omega-rho model and in the frame of non-relativistic Landau Fermi-liquid theory. Comparing the results of these two approaches we found all 16 Landau parameters for nucleon-hyperon matter. Using these Landau parameters the entrainment matrix was determined for any temperature. The results can be important for modelling the pulsations and for the analysis of gravitational-driven instabilities of superfluid neutron stars.


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