Magnetic fields in axisymmetric neutron stars
Magnetic fields in axisymmetric neutron stars
复制标题
轴对称中子星的磁场
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
David Jones
中科院分区：
文献类型：
--
作者：
S. K. Lander;David Jones
我们推导出轴对称牛顿磁流体力学的一般方程，并使用这些代码的基础上计算平衡配置的旋转磁化中子星在静止状态。我们调查的字段配置，从我们的形式主义，其中包括纯极向，纯环向和混合场。对于混合场的形式主义，环形分量似乎是有界的小于7%.We计算磁场和旋转引起的失真。从我们的非线性工作中，我们能够看到微扰工作的有效性范围：我们发现，如果椭圆率小于0.15或平均场强小于10^17 G，那么我们的结果表明，磁畸变的微扰区公式与非线性结果的一致性在10%以内。我们还考虑如何磁化平衡结构不同的多变指数。
We derive general equations for axisymmetric Newtonian magnetohydrodynamics and use these as the basis of a code for calculating equilibrium configurations of rotating magnetized neutron stars in a stationary state. We investigate the field configurations that result from our formalism, which include purely poloidal, purely toroidal and mixed fields. For the mixed-field formalism, the toroidal component appears to be bounded at less than 7 per cent. We calculate distortions induced both by magnetic fields and by rotation. From our non-linear work, we are able to look at the realm of validity of perturbative work: we find for our results that perturbative-regime formulae for magnetic distortions agree to within 10 per cent of the non-linear results if the ellipticity is less than 0.15 or the average field strength is less than 10^17 G. We also consider how magnetized equilibrium structures vary for different polytropic indices.