CCO和隐藏的磁场场景
CCOs and the hidden magnetic field scenario
摘要：
CCO是位于超新星遗迹中心附近的X射线源，其表面磁场的推断值明显低于（小于约1 e11 G）标准超新星。在本文中，我们修改了隐藏的磁场的情况下，提出了第一个二维模拟的中子星的地壳中的磁场的淹没和重新出现。超新星爆发后的吸积阶段，大约是1 e-4- 1 e-3太阳质量，覆盖了地表的一大片区域，这是将磁场埋入地壳内部所必需的。当吸积停止时，磁场会在1-100 kyr的典型时间尺度上重新出现，这取决于淹没条件。在此阶段之后，表面磁场恢复到接近其出生值。隐藏的磁场的一个可能的可观测结果是表面温度分布的各向异性，与这些源中的几个源的观测结果一致。我们的结论是，隐藏的磁场模型是可行的替代反磁星的情况下，它可以提供CCO和其他类孤立的中子星之间的缺失环节。
英文摘要：
CCOs are X-ray sources lying close the center of supernova remnants, with inferred values of the surface magnetic fields significantly lower (less than about 1e11 G) than those of standard pulsars. In this paper, we revise the hidden magnetic field scenario, presenting the first 2D simulations of the submergence and reemergence of the magnetic field in the crust of a neutron star. A post-supernova accretion stage of about 1e-4-1e-3 solar masses over a vast region of the surface is required to bury the magnetic field into the inner crust. When accretion stops, the field reemerges on a typical timescale of 1-100 kyr, depending on the submergence conditions. After this stage, the surface magnetic field is restored close to its birth values. A possible observable consequence of the hidden magnetic field is the anisotropy of the surface temperature distribution, in agreement with observations of several of these sources. We conclude that the hidden magnetic field model is viable as alternative to the anti-magnetar scenario, and it could provide the missing link between CCOs and the other classes of isolated neutron stars.
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