发表机构
Botswana International University of Science and Technology（博茨瓦纳国际科学技术大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究在相对论平均场框架下，采用FSU2H参数化方案，探究强磁场对超子中子星物态方程及质量-半径结构的影响，发现AMM耦合可提供磁场硬化机制，结果符合2.00-2.02倍太阳质量中子星观测，为相关研究提供基准。
AI 中文摘要
我们在相对论平均场（RMF）框架内，研究强磁场对冷、电中性、β平衡超子中子星物质的物态方程（EoS）及恒星结构的影响。该物质部分包含全部重子八重态和轻子，带电粒子发生朗道量子化，所有重子通过各自的反常磁矩（AMM）与磁场耦合。计算采用RMF FSU2H超子参数化方案，对零磁场、恒定磁场以及密度相关的磁场分布三种情况进行对比。研究发现，强磁场通过朗道量子化与AMM诱导的自旋分裂的竞争效应改变超子组成；朗道量子化使磁化超子物态方程软化，而AMM的引入为超子物质提供了额外的磁场硬化机制。是否引入AMM耦合的结果均与2.00-2.02倍太阳质量的中子星观测数据及小半径结果一致。本研究为评估AMM对磁化超子中子星的组成、磁化强度、物态方程及质量-半径结构的影响提供了基准。
英文摘要
We investigate the effects of strong magnetic fields on the equation of state (EoS) and stellar structure of cold, charge-neutral, $β$-equilibrated hyperonic neutron-star matter within a relativistic mean-field (RMF) framework. The matter sector contains the full baryon octet and leptons, while charged particles are Landau quantized and all baryons are coupled to the magnetic field through their anomalous magnetic moments (AMM). The calculation is performed with the RMF FSU2H hyperonic parameterization and compared for zero field, constant magnetic fields, and density-dependent magnetic-field profiles. We find that strong magnetic fields modify the hyperonic composition through the competing effects of Landau quantization and AMM-induced spin splitting. Landau quantization softens the magnetized hyperonic equation of state. The inclusion of AMM provides an additional magnetic stiffening mechanism in hyperonic matter. The results for the inclusion of the AMM coupling and not are still consistent with observations of $2.00$-$2.02\,M_{\odot}$ neutron stars and small radii. The present work therefore provides a benchmark for assessing the influence of AMM on the composition, magnetization, equation of state, and mass-radius structure of magnetized hyperonic neutron-star matter.
