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arXiv 0904.3467astro-ph.HEastro-ph.SRnucl-th
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零温下超流核子-超子混合物的相对论卷吸矩阵

The relativistic entrainment matrix of a superfluid nucleon-hyperon mixture at zero temperature

M. E. Gusakov, E. M. Kantor, P. Haensel

摘要:

本文计算了零温下由中子、质子、λ-超子和σ-超子以及电子和μ-超子组成的核子-超子混合物的相对论卷吸矩阵Y_ik。该矩阵类似于非相对论理论的夹带矩阵(也称为质量-密度矩阵或Andreev-Bashkin矩阵)。它是模拟具有超流核子-超子核的大质量中子星脉动的重要组成部分。计算是在推广到超流混合物的相对论朗道费米液体理论框架下进行的,矩阵Y_ik由核子-超子物质的朗道参数表示。结果示出了一个特定的例子的sigma-omega-rho平均场模型与标量自相互作用。利用该模型计算了矩阵Y_ik和朗道参数。我们还分析了核子-超子物质的基态在小扰动下的稳定性。

英文摘要:

We calculate the relativistic entrainment matrix Y_ik at zero temperature for nucleon-hyperon mixture composed of neutrons, protons, Lambda and Sigma^- hyperons, as well as of electrons and muons. This matrix is analogous to the entrainment matrix (also termed mass-density matrix or Andreev-Bashkin matrix) of non-relativistic theory. It is an important ingredient for modelling the pulsations of massive neutron stars with superfluid nucleon-hyperon cores. The calculation is done in the frame of the relativistic Landau Fermi-liquid theory generalized to the case of superfluid mixtures; the matrix Y_ik is expressed through the Landau parameters of nucleon-hyperon matter. The results are illustrated with a particular example of the sigma-omega-rho mean-field model with scalar self-interactions. Using this model we calculate the matrix Y_ik and the Landau parameters. We also analyze stability of the ground state of nucleon-hyperon matter with respect to small perturbations.

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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