暖$npe^-$物质的动力学不稳定性：$δ$介子效应
Dynamical instabilities of warm $npe^-$ matter: the $δ$ meson effects
摘要：
在相对论平均场强子模型（NL 3，NL $ρ$和NL $ρδ$）的框架下，考虑电磁场的影响，研究了$δ$介子对冷、暖核物质和恒星物质在亚饱和密度下动力学不稳定性的影响.讨论了蒸馏效应和所有模型的旋节线。得到了$β$平衡态物质在有和无中微子捕获时壳核跃迁密度和压力随温度的变化关系。在非均相中形成的团簇的大小的估计。结果表明，团簇尺寸随温度的升高而增大。$δ$介子对不稳定区的影响在低温、非对称物质和密度接近旋节面时较大。在高于$\sim 0.4ρ_0$时，它增加蒸馏效果，而在低于该密度时具有相反的效果。
英文摘要：
The effects of $δ$ mesons on the dynamical instabilities of cold and warm nuclear and stellar matter at subsaturation densities are studied in the framework of relativistic mean-field hadron models (NL3, NL$ρ$ and NL$ρδ$) with the inclusion of the electromagnetic field. The distillation effect and the spinodals for all the models considered are discussed. The crust-core transition density and pressure are obtained as a function of temperature for $β$-equilibrium matter with and without neutrino trapping. An estimation of the size of the clusters formed in the non-homogeneous phase is made. It is shown that cluster sizes increase with temperature. The effects of the $δ$-meson on the instability region are larger for low temperatures, very asymmetric matter and densities close to the spinodal surface. It increases the distillation effect above $\sim 0.4ρ_0$ and has the opposite effect below that density.
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