论文标题

中子恒星内皮:旋转和磁场的影响

Neutron star inner crust: effects of rotation and magnetic fields

论文作者

Sengo, Ivo, Pais, Helena, Franzon, Bruno, Providência, Constança

论文摘要

我们研究了面食相对于旋转和磁性中子星的性质的作用。为了研究这种系统,我们使用两个不同的相对论均值统一的内部壳状内壳方程,对称能量的密度依赖性不同,并且在托马斯 - 费尔米计算中计算的内膜。特别注意地壳核过渡密度,意大利面相对恒星的全球性质产生影响。通过考虑离心力和洛伦兹力引起的各向异性,通过自我一致地求解Einstein-Maxwell方程来计算强磁场和快速旋转的效果。计算了磁场中性线的位置和赤道平面上洛伦兹力的最大值。讨论了它们落入内皮区域内的条件。我们验证了具有较大对称能斜率的模型对磁场变化的敏感性更高。洛伦兹力的最大值之一,中性线,对于一定范围的频率,落在内皮区域内。这可能会对地壳的裂缝产生后果,并可能有助于解释与星星地震相关的现象。

We study the role of the pasta phases on the properties of rotating and magnetized neutron stars. In order to investigate such systems, we make use of two different relativistic mean-field unified inner-crust--core equations of state, with a different density dependence of the symmetry energy, and an inner-crust computed within a Thomas-Fermi calculation. Special attention is given to the crust-core transition density, and the pasta phases effects on the global properties of stars. The effects of strong magnetic fields and fast rotation are computed by solving the Einstein-Maxwell equations self-consistently, taking into account anisotropies induced by the centrifugal and the Lorentz force. The location of the magnetic field neutral line and the maximum of the Lorentz force on the equatorial plane are calculated. The conditions under which they fall inside the inner crust region are discussed. We verified that models with a larger symmetry energy slope show more sensitivity to the variation of the magnetic field. One of the maxima of the Lorentz force, as well as the neutral line, and for a certain range of frequencies, fall inside the inner crust region. This may have consequences in the fracture of the crust, and may help explain phenomena associated with star quakes.

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