arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2103.10218astro-ph.HEgr-qc
收藏

中子星动力学的超流体观点

A superfluid perspective on neutron star dynamics

N. Andersson

摘要:

由于成熟的中子星是冷的(在相关的温标上),人们必须仔细考虑它们内部的物质状态。外千米左右的区域预计会冻结,形成一个由越来越多的富含中子的核组成的弹性外壳,与超流中子成分共存,而恒星的流体核心则包含一个混合的超流/超导体。恒星的动力学很大程度上取决于与不同相位相关的参数。超流的存在带来了新的自由度-本质上我们正在处理一个复杂的多流体系统-和额外的特征:大量旋转由一系列密集的量子化涡旋支持,这些涡旋通过相互摩擦引入耗散,超流的运动受到所谓的夹带效应的影响。这个简短的调查提供了一个介绍-随着我们目前的理解-这些动力学方面的评论,特别注意夹带的作用,并概述了超流对中子星地震学的影响。

英文摘要:

As mature neutron stars are cold (on the relevant temperature scale), one has to carefully consider the state of matter in their interior. The outer kilometer or so is expected to freeze to form an elastic crust of increasingly neutron-rich nuclei, coexisting with a superfluid neutron component, while the star's fluid core contains a mixed superfluid/superconductor. The dynamics of the star depend heavily on the parameters associated with the different phases. The presence of superfluidity brings new degrees of freedom -- in essence we are dealing with a complex multi-fluid system -- and additional features: Bulk rotation is supported by a dense array of quantised vortices, which introduce dissipation via mutual friction, and the motion of the superfluid is affected by the so-called entrainment effect. This brief survey provides an introduction to -- along with a commentary on our current understanding of -- these dynamical aspects, paying particular attention to the role of entrainment, and outlines the impact of superfluidity on neutron-star seismology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑