arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1612.04670astro-ph.HEastro-ph.SR
收藏

高磁化中子星的地壳效应和冷却弛豫时间

Crust effects and the cooling relaxation time in highly magnetized neutron stars

B. Franzon, R. Negreiros, S. Schramm

摘要:

我们研究了强磁场对中子星地壳结构和几何形状的影响。我们发现地壳的几何形状被恒星内部的磁场所改变。我们利用已知的状态方程描述中子星的地壳,建立了稳定的轴对称磁化恒星模型,即Skyrme模型(Sky)描述内地壳,Baym,Pethick,and Sutherland(BPS)状态方程描述外地壳.我们表明,磁场具有双重作用,有助于地壳变形通过电磁相互作用(在这种情况下表现为洛伦兹力),并通过有助于曲率由于存储在它。我们还研究了由于磁场的地壳变形的直接后果:热弛豫时间。这个量,这是非常重要的热演化的中子星是敏感的地壳性质,因此,我们表明,它可能会受到强烈的影响的磁场。

英文摘要:

We study the effects of high magnetic fields on the structure and on the geometry of the crust in neutron stars. We find that the crust geometry is substantially modified by the magnetic field inside the star. We build stationary and axis-symmetric magnetized stellar models by using well-known equations of state to describe the neutron star crust, namely the Skyrme model (Sky) for the inner crust and the Baym, Pethick, and Sutherland (BPS) equation of state for the outer crust. We show that the magnetic field has a dual role, contributing to the crust deformation via the electromagnetic interaction (manifested in this case as the Lorentz force) and by contributing to curvature due to the energy stored in it. We also study a direct consequence of the crust deformation due to the magnetic field: the thermal relaxation time. This quantity, which is of great importance to the thermal evolution of neutron stars is sensitive to the crust properties and, as such, we show that it may be strongly affected by the magnetic field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑