New code for equilibriums and quasiequilibrium initial data of compact objects. IV. Rotating relativistic stars with mixed poloidal and toroidal magnetic fields
New code for equilibriums and quasiequilibrium initial data of compact objects. IV. Rotating relativistic stars with mixed poloidal and toroidal magnetic fields
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DOI：
10.1103/physrevd.100.123019
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发表时间：
2019-06
影响因子：
5
通讯作者：
K. Uryū;Shijun Yoshida;E. Gourgoulhon;C. Markakis;K. Fujisawa;A. Tsokaros;K. Taniguchi;Y. Eriguchi
中科院分区：
文献类型：
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作者：
K. Uryū;Shijun Yoshida;E. Gourgoulhon;C. Markakis;K. Fujisawa;A. Tsokaros;K. Taniguchi;Y. Eriguchi
一个新的代码计算强磁化快速旋转致密星的完全广义相对论解的开发作为紧凑对象计算器（cocal）代码的一部分。爱因斯坦方程组，麦克斯韦方程组，磁流体动力学方程组的完整的解决方案始终假设完美的导电性，平稳性和轴对称性，并与混合极向和环形分量的磁场强磁化的解决方案成功地获得在通用（非圆形）时空。我们详细介绍了问题的形式和数值方法，然后给出极端磁化紧星星解的例子和它们的收敛性检验。研究发现，在极端磁化的恒星中，恒星物质可以从最强的环向场区域被驱逐出去。因此，我们推测，一个环形的电真空区可能会出现在极端磁化致密的恒星，这可能看起来像中子星星成为最强的环形螺线管线圈在宇宙中。
A new code for computing fully general relativistic solutions of strongly magnetized rapidly rotating compact stars is developed as a part of the Compact Object CALculator (cocal) code. The full set of Einstein’s equations, Maxwell’s equations, and magnetohydrodynamic equations are consistently solved assuming perfect conductivity, stationarity, and axisymmetry, and strongly magnetized solutions associated with mixed poloidal and toroidal components of magnetic fields are successfully obtained in generic (noncircular) spacetimes. We introduce the formulation of the problem and the numerical method in detail, then present examples of extremely magnetized compact star solutions and their convergence tests. It is found that, in extremely magnetized stars, the stellar matter can be expelled from the region of strongest toroidal fields. Hence, we conjecture that a toroidal electrovacuum region may appear inside of the extremely magnetized compact stars, which may seem like the neutron star becoming the strongest toroidal solenoid coil in the Universe.