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arXiv · 0901.4108

Damping of sound waves in superfluid nucleon-hyperon matter of neutron stars

Elena M. Kantor·Mikhail E. Gusakov
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Abstract

We consider sound waves in superfluid nucleon-hyperon matter of massive neutron-star cores. We calculate and analyze the speeds of sound modes and their damping times due to the shear viscosity and non-equilibrium weak processes of particle transformations. For that, we employ the dissipative relativistic hydrodynamics of a superfluid nucleon-hyperon mixture, formulated recently [M.E. Gusakov and E.M. Kantor, Phys. Rev. D78, 083006 (2008)]. We demonstrate that the damping times of sound modes calculated using this hydrodynamics and the ordinary (nonsuperfluid) one, can differ from each other by several orders of magnitude.

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Elena M. Kantor, Mikhail E. Gusakov. 2009-01-26. Damping of sound waves in superfluid nucleon-hyperon matter of neutron stars. https://doi.org/10.1103/physrevd.79.043004

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