混合星的磁场形变
Magnetic-Field Induced Deformation in Hybrid Stars
摘要：
首次详细研究了强磁场对大质量中子星内部可能发生的退禁闭相变的影响。对于强子物质，采用了非常普遍的密度依赖相对论平均场（DD-RMF）模型，而简单但有效的矢量增强袋模型（vBag）模型用于研究夸克物质。磁场效应被纳入物质状态方程和广义相对论解中，它们也满足麦克斯韦方程。我们发现，对于大值的磁偶极矩，最大质量，正则质量半径，和无量纲潮汐变形恒星使用球对称托尔曼-奥本海默-托洛霍夫（TOV）方程和轴对称的解决方案，通过LORENE库获得的差异很大。偏差取决于状态方程的刚度和被分析的恒星质量。这表明，与文献中先前假设的不同，各向同性恒星近似的磁场阈值和TOV方程的可接受使用取决于物质组成和相互作用。
英文摘要：
The effects of strong magnetic fields on the deconfinement phase transition expected to take place in the interior of massive neutron stars are studied in detail for the first time. For hadronic matter, the very general density-dependent relativistic mean-field (DD-RMF) model is employed, while the simple, but effective vector-enhanced bag model (vBag) model is used to study quark matter. Magnetic-field effects are incorporated into the matter equation of state and in the general-relativity solutions, which also satisfy Maxwell's equations. We find that for large values of magnetic dipole moment, the maximum mass, canonical mass radius, and dimensionless tidal deformability obtained for stars using spherically symmetric Tolman-Oppenheimer-Volkoff (TOV) equations and axisymmetric solutions attained through the LORENE library differ considerably. The deviations depend on the stiffness of the equation of state and on the star mass being analyzed. This points to the fact that, unlike what was assumed previously in the literature, magnetic field thresholds for the approximation of isotropic stars and the acceptable use of TOV equations depend on the matter composition and interactions.
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