声波在中子星超流核子-超子物质中的阻尼
Damping of sound waves in superfluid nucleon-hyperon matter of neutron stars
摘要：
本文研究大质量中子星核超流核子超子物质中的声波。我们计算和分析了由于剪切粘性和粒子变换的非平衡弱过程引起的声速和它们的阻尼时间。为此，我们采用了耗散相对论流体动力学的超流核子超子混合物，最近制定的[M. E。Gusakov和E.M. Kantor，Phys.Rev.D78，083006（2008）]。我们表明，阻尼时间的声音模式计算使用这种流体力学和普通（nonsuperfluid）的，可以彼此不同的几个数量级。
英文摘要：
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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