Almost analytic models of ultramagnetized neutron star envelopes
Almost analytic models of ultramagnetized neutron star envelopes
复制标题
超磁化中子星包层的几乎解析模型
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
L. Hernquist
中科院分区：
文献类型：
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作者：
J. Heyl;L. Hernquist
最近的ROSAT测量表明，孤立中子星的x射线辐射在恒星自转周期被调制。为了解释这些测量结果，人们需要精确计算中子星薄绝缘外壳的热量传递。我们提出了超磁化中子星包层热结构的近似解析模型。具体地说，我们考察了仅填满地面朗道水平面的极限。我们使用这些模型来估计强磁化中子星表面温度的不均匀性所期望的调制幅度。此外，我们估计了具有B 10 15 10 16 G场的恒星的冷却速率，这与调用“磁星”来解释某些重复源的软射线发射的模型有关。
Recent ROSAT measurements show that the x-ray emission from isolated neutron stars is modulated at the stellar rotation period. To interpret these measurements, one needs precise calculations of the heat transfer through the thin insulating envelopes of neutron stars. We present nearly analytic models of the thermal structure of the envelopes of ultramagnetized neutron stars. Specifically, we examine the limit in which only the ground Landau level is filled. We use the models to estimate the amplitude of modulation expected from non-uniformities in the surface temperatures of strongly magnetized neutron stars. In addition, we estimate cooling rates for stars with fields B � 10 15 10 16 G which are relevant to models that invoke “magnetars” to account for soft -ray emission from some repeating sources.