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

Journal Article · Sun Feb 15 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.043004· OSTI ID:21259970

Kantor, Elena M; Gusakov, Mikhail E ^[1]

---

1. Ioffe Physical Technical Institute, Politekhnicheskaya 26, 194021 Saint-Petersburg (Russian Federation)

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 nonequilibrium weak processes of particle transformations. For that, we employ the dissipative relativistic hydrodynamics of a superfluid nucleon-hyperon mixture, formulated recently 1. 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.

• OSTI ID: 21259970
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 4; Other Information: DOI: 10.1103/PhysRevD.79.043004; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

39
COMPUTERIZED SIMULATION
HYDRODYNAMICS
HYPERONS
NEUTRON STARS
NUCLEONS
PARTICLES
RELATIVISTIC RANGE
SOUND WAVES
SUPERFLUIDITY
VELOCITY