论文标题
中子星形地壳的变形晶体和扭转振荡
Deformed crystals and torsional oscillations of neutron star crust
论文作者
论文摘要
我们研究了离子离子相互作用的电子等离子体筛选，研究中子恒星壳中库仑晶体的断裂应力。计算出的断裂应力是电子筛选参数的函数。我们将结果应用于分析非磁性恒星外壳中的扭转振荡模式。我们提出了这种振荡的基本频率的精确分析表达，并表明所有扭转振荡的频率对外中性星形外壳的存在不敏感。该结果在涉及中子恒星外壳中涉及变形的库仑晶体的过程的理论模型中很有用，例如磁场演化，扭转地壳或热弹性弹性的弹性弹性弹性弹性弹性弹性振荡，脉冲性脉冲孔的振荡。讨论了结果对软γ射线中继器的适用性。
We study breaking stress of deformed Coulomb crystals in a neutron star crust, taking into account electron plasma screening of ion-ion interaction; calculated breaking stress is fitted as a function of electron screening parameter. We apply the results for analyzing torsional oscillation modes in the crust of a non-magnetic star. We present exact analytic expression for the fundamental frequencies of such oscillations and show that the frequencies of all torsional oscillations are insensitive to the presence of the outer neutron star crust. The results can be useful in theoretical modeling of processes involving deformed Coulomb crystals in the crust of neutron stars, such as magnetic field evolution, torsional crustal or thermo-elastic quasi-periodic oscillations of flaring soft gamma-ray repeaters, pulsar glitches. The applicability of the results to soft gamma-ray repeaters is discussed.
