标题： 中子星地幔中的涡旋构型、振荡与钉扎 显示英文标题

标题： Vortex Configurations, Oscillations and Pinning in Neutron Star Crusts

摘要： 中子星内壳的旋转中子超流体被量子化的涡旋线贯穿。 晶格核产生的钉扎力和中子超流体产生的马格努斯力作用于具有有限张力的涡旋线上。 当自转轴略微倾斜于晶体晶格的主要轴，并且马格努斯力不是很强时，平衡状态下的涡旋线构型由若干段被钉扎的直线部分组成，这些直线部分由未被钉扎的折点分隔开。 在约 3.4 × 10^13 克每立方厘米的密度下形成一个折点需要大约 4 MeV 的能量。 马格努斯力使涡旋线在全球尺度上呈现抛物线形状。 允许在涡旋线上振荡的有两种模式，分别是旋转和平行螺旋（Kelvin）。 钉扎直线段中的涡旋振荡只有在超过某一最小频率时才可能发生。 我们没有发现随时间增长的不稳定模式。 因此，带有折点的涡旋构型可能是稳定的，并产生强钉扎状态。 即使考虑多晶结构中的涡旋行为，我们的结果本质也不会改变。 我们的研究表明，在多晶结构中涡旋线的钉扎仍然足够强，可以解释大的脉动。 显示英文摘要

摘要： The rotating neutron superfluid in the inner crust of a neutron star is threaded by quantized vortex lines. The pinning force from lattice nuclei and the Magnus force from neutron superfluid act onto a vortex line that has a finite tension. The configuration of a vortex line in equilibrium comprises a number of pinned straight lengths separated by unpinned kinks when the rotation axis is slightly inclined to the major axis of a crystal lattice and the Magnus force is not so strong. Energy of ~ 4 MeV is required to form a kink at densities of ~ 3.4 x 10^13 g cm^-3. Magnus force makes the vortex line parabolic on global scale. There exist two modes, rotational and helical (Kelvin), for oscillations allowed on a vortex line. The vortex oscillations in the pinned straight segments are possible only above a minimum frequency. We find no unstable mode that grows with time. Hence, the vortex configurations with kinks may be stable and yield the strongly pinned state. The essence of our results may not be altered even when we consider the vortex behaviors in a polycrystalline structure. Our studies suggest that pinning of a vortex line in a polycrystalline structure would be still strong enough to explain the large glitches.