The alignment of the Crab pulsar magnetic axis
The alignment of the Crab pulsar magnetic axis
复制标题
蟹状脉冲星磁轴的对准
DOI：
10.1007/bf00646019
复制
发表时间：
1975
期刊：
影响因子：
--
通讯作者：
P. B. Jones
中科院分区：
文献类型：
--
作者：
P. B. Jones
对内部物质由超流中子和超导质子组成的中子星的磁畸变进行了估计。对于第II类质子超导电性，量子化磁通体的二维晶格中磁通的排列和超导载流子的动能导致场和超导体的空间平均应力张量的某些分量比相同磁通量均匀分布的Max-well应力张量的分量大几个数量级。结果表明，对于Crab脉冲星PSR0531+21，其大部分质量是以超流中子和超导质子的形式存在的，在决定惯性张量偏离其球对称形式时，磁变形几乎肯定比外壳的碎裂能更重要。在假设内外磁场具有相同的对称轴的情况下，预测了Crab脉冲星的外场偶极矩近似垂直于自旋方向，这与已发表的一些观测数据的解释是一致的。
The magnetic distortion is estimated for neutron stars in which the matter in the interior consists of superfluid neutrons and superconducting protons. For type II proton superconductivity, the arrangement of magnetic flux in a two-dimensional lattice of quantized fluxoids and the kinetic energy of the supercurrent carriers cause some components of the spatially averaged stress tensor for field and superconductor to be several orders of magnitude greater than the components of the Max-well stress tensor for a uniform distribution of the same magnetic flux. It is shown that for the Crab pulsar PSR 0531+21, which is considered to have the greater part of its mass in the form of superfluid neutrons and superconducting protons, the magnetic distortion is almost certainly more important than the clastic energy of the outer shell in determining the departure of the inertia tensor from its spherically symmetric form. With the assumption that internal and external magnetic fields have the same symmetry axis, the external field dipole moment of the Crab pulsar is predicted to be approximately perpendicular to the spin direction, in agreement with a number of published interpretations of observational data.