论文标题
冷恒星物质的Landau参数和夹带矩阵：对称能量和强磁场的影响
Landau parameters and entrainment matrix of cold stellar matter: effect of the symmetry energy and strong magnetic fields
论文作者
论文摘要
计算了基于相对论方法的核物质特性，适用于描述多组分系统的描述。我们使用一组满足可接受的核物质和中子星观测的核相对论平均模型。讨论了对称能量的密度依赖性和由于存在强外部磁场而导致的兰道量化的影响。质子分数，Landau质量，Landau参数和夹带矩阵，绝热指数和声速等属性是针对冷$β$平衡物质计算的。在计算的属性上，以两到三倍的饱和密度$ρ_0$获得了大的分散体。 Proton Landau质量可以低至2-3 $ 〜ρ_0 $的真空核质量的三分之一。尤其是涉及质子的Landau参数的相似效果，其中$ f^0_ {pp} $和$ f^1_ {pp} $的相对分散体在2-3 $ 〜ρ_0 $上高达30 \％至50 \％。这些参数对对称能量特别敏感。对于高达10 $^{18} $ g的磁场对核特性的影响很小，除了恰好高于甲壳核过渡上方的少量密度。具有EOS和参数的表格在补充材料部分中提供。
Nuclear matter properties based on a relativistic approach suitable for the description of multi-component systems are calculated. We use a set of nuclear relativistic mean-field models that satisfy acceptable nuclear matter properties and neutron star observations. The effects of the density dependence of the symmetry energy and of the Landau quantization due to the presence of a strong external magnetic field are discussed. Properties such as the proton fraction, the Landau mass, Landau parameters and entrainment matrix, the adiabatic index and speed of sound are calculated for cold $β$-equilibrium matter. A large dispersion on the calculated properties is obtained at two to three times saturation density $ρ_0 $. The proton Landau mass can be as low as one third of the vacuum nucleon mass at 2-3$~ρ_0 $. Similar effects are obtained for the Landau parameters, in particular, the ones involving protons, where the relative dispersion of $F^0_{pp}$ and $F^1_{pp}$ is as high as 30\% to 50\% at 2-3$~ρ_0 $. These parameters are particularly sensitive to the symmetry energy. The effect of the magnetic field on the nuclear properties is small for fields as high as 10$^{18}$G except for a small range of densities just above the crust-core transition. Tables with the EoS, and the parameters, are provided in the Supplementary Material section.
