NICER has observed a few millisecond pulsars where the geometry of the X-ray-emitting hotspots on the neutron star have been analyzed in order to constrain the mass and radius from X-ray light-curve modeling. One example, PSR J0030 + 0451, has been shown to possibly have significant multipolar magnetic fields at the stellar surface. Using force-free simulations of the magnetosphere structure, it has been shown that the radio, X-ray, and γ-ray light curves can be modeled simultaneously with an appropriate field configuration. An even more stringent test is to compare predictions of the force-free magnetosphere model with observations of radio polarization. This paper attempts to reproduce the radio polarization of PSR J0030 + 0451 using a force-free magnetospheric solution. As a result of our modeling, we can reproduce certain features of the polarization well.

中文翻译：

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多极磁场毫秒脉冲星的射电极化

NICER 观测了几毫秒脉冲星，并分析了中子星上 X 射线发射热点的几何形状，以便通过 X 射线光曲线建模来约束质量和半径。一个例子，PSR J0030 + 0451，已被证明在恒星表面可能具有显着的多极磁场。通过对磁层结构的无力模拟，已经表明无线电、X 射线和γ射线光曲线可以与适当的场配置同时建模。更严格的测试是将无力磁层模型的预测与射电极化的观测结果进行比较。本文尝试使用无力磁层解决方案重现 PSR J0030 + 0451 的无线电偏振。通过我们的建模，我们可以很好地重现偏振的某些特征。