超流和超导中子星核的磁流体动力学
Magnetohydrodynamics of superfluid and superconducting neutron star cores
摘要：
成熟的中子星足够冷，可以包含大量的超流体和超导成分。这些系统的区别在于存在与超流性相关的额外动力学自由度。为了考虑模型的冷凝物的混合物，我们需要开发一个多流体的描述，占旋转中子涡旋和磁质子通量管的存在。我们还需要对阻碍涡旋和通量管运动的力进行建模，并了解这些力如何作用于凝聚体。本文讨论了中子星外核的超流中子与第二类质子超导体和电子气共存的模型。我们讨论了该系统的流体动力学，重点是卷吸效应，磁场，涡流/磁通管张力和耗散相互摩擦力的作用。我们的最终结果可以直接应用于许多有趣的天体物理场景，例如与中子星振荡或大尺度磁场的演化。
英文摘要：
Mature neutron stars are cold enough to contain a number of superfluid and superconducting components. These systems are distinguished by the presence of additional dynamical degrees of freedom associated with superfluidity. In order to consider models with mixtures of condensates we need to develop a multifluid description that accounts for the presence of rotational neutron vortices and magnetic proton fluxtubes. We also need to model the forces that impede the motion of vortices and fluxtubes, and understand how these forces act on the condensates. This paper concerns the development of such a model for the outer core of a neutron star, where superfluid neutrons co-exist with a type II proton superconductor and an electron gas. We discuss the hydrodynamics of this system, focusing on the role of the entrainment effect, the magnetic field, the vortex/fluxtube tension and the dissipative mutual friction forces. Out final results can be directly applied to a number of interesting astrophysical scenarios, e.g. associated with neutron star oscillations or the evolution of the large scale magnetic field.
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