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arXiv physics/9811051physics.plasm-phastro-ph
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强磁场中氢等离子体的电离平衡和状态方程

Ionization equilibrium and equation of state of hydrogen plasmas in strong magnetic fields

A. Y. Potekhin, G. Chabrier, Yu. A. Shibanov, J. Ventura

摘要:

我们研究了磁场为B ~ 10^{12}-10 13}高斯、密度为10^{-3}-10 3 g/cc、温度为T ~ 10 {5.5}-10 6. 5} K的氢等离子体,这是典型的中年冷却中子星光球。我们建立了一个分析的自由能模型的部分电离等离子体,包括考虑到偏心的原子态,这是由于热运动在强场。我们发现,这些状态,在以前的研究中被忽略,可能会对密度低于1 g/cc和典型的B和T的外大气层的热力学有明显的贡献。我们考虑了强磁场作用下等离子体电离分量的库仑非理想性。计算了电离度、占位数和状态方程,研究了它们与温度、密度和磁场的关系。

英文摘要:

We study hydrogen plasmas at magnetic fields B ~ 10^{12}-10^{13} Gauss, densities ~ 10^{-3}-10^3 g/cc and temperatures T ~ 10^{5.5}-10^{6.5} K, typical of photospheres of middle-aged cooling neutron stars. We construct an analytical free energy model of the partially ionized plasma, including into consideration the decentred atomic states, which arise due to the thermal motion across the strong field. We show that these states, neglected in previous studies, may contribute appreciably into thermodynamics of the outer atmospheric layers at density below 1 g/cc and typical B and T. We take into account Coulomb non-ideality of the ionized component of the plasma affected by intense magnetic field. Ionization degree, occupancies and equation of state are calculated, and their dependences on the temperature, density and magnetic field are studied.

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。

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