差异旋转中子星中的不稳定超流Stewartson层
An unstable superfluid Stewartson layer in a differentially rotating neutron star
摘要：
实验和数值证据的存在Stewartson层的球形Couette流在小Ekman和Rossby数（$\Ek \lsim 10^{-3}$，$\Ro \lsim 10^{-2}$），相关的流体动力学制度的超流外核的中子星进行审查。首次对超流Stewartson层进行了数值模拟，显示了该层如何被非轴对称不稳定性破坏。$\Ek$和$\Ro$的不稳定范围进行了比较，这些数量的估计在无线电发射机表现出毛刺。人们发现，故障脉冲星位于不稳定边界的稳定侧，允许在故障之前建立差动旋转。
英文摘要：
Experimental and numerical evidence is reviewed for the existence of a Stewartson layer in spherical Couette flow at small Ekman and Rossby numbers ($\Ek \lsim 10^{-3}$, $\Ro \lsim 10^{-2}$), the relevant hydrodynamic regime in the superfluid outer core of a neutron star. Numerical simulations of a superfluid Stewartson layer are presented for the first time, showing how the layer is disrupted by nonaxisymmetric instabilities. The unstable ranges of $\Ek$ and $\Ro$ are compared with estimates of these quantities in radio pulsars that exhibit glitches. It is found that glitching pulsars lie on the stable side of the instability boundary, allowing differential rotation to build up before a glitch.
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