中子星的扩散热包层
Diffusive heat blanketing envelopes of neutron stars
摘要：
我们构造了由处于扩散平衡和非扩散平衡的二元离子混合物（H-He，He-C，C-Fe）组成的中子星的外层热覆盖包层的新模型。为了这个目的，我们推广我们以前的工作在等温气体或库仑液体等离子体中的离子扩散处理非等温系统。我们计算的有效表面温度Ts和温度Tb之间的关系，在底部的热覆盖信封（在密度rhob= 1 e8 - 1 e10 g/cc）的扩散平衡和非平衡分布的离子物种在不同的质量Δ M的较轻的离子在信封。我们的主要结果是，Ts - Tb关系是相当不敏感的详细分布的离子分数的信封（扩散平衡或不），几乎完全依赖于DeltaM。得到的关系式近似的解析表达式，这是方便的模拟中子星的演化。
英文摘要：
We construct new models of outer heat blanketing envelopes of neutron stars composed of binary ion mixtures (H - He, He - C, C - Fe) in and out of diffusive equilibrium. To this aim, we generalize our previous work on diffusion of ions in isothermal gaseous or Coulomb liquid plasmas to handle non-isothermal systems. We calculate the relations between the effective surface temperature Ts and the temperature Tb at the bottom of heat blanketing envelopes (at a density rhob= 1e8 -- 1e10 g/cc) for diffusively equilibrated and non-equilibrated distributions of ion species at different masses DeltaM of lighter ions in the envelope. Our principal result is that the Ts - Tb relations are fairly insensitive to detailed distribution of ion fractions over the envelope (diffusively equilibrated or not) and depend almost solely on DeltaM. The obtained relations are approximated by analytic expressions which are convenient for modeling the evolution of neutron stars.
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