论文标题
核对称能及其在甲壳核过渡，半径和潮汐变形性恒星的曲率相关性及其烙印
Curvature-slope correlation of nuclear symmetry energy and its imprints on the crust-core transition, radius and tidal deformability of canonical neutron stars
论文作者
论文摘要
背景：核对称能量$ e_ {sym}（ρ）$编码有关使核系统更富含中子所需的能量的信息。虽然最近的天体物理观测和地面核实验的稳定性$ρ_0$ρ_0$ρ_0$ρ_0的斜率参数L受到了很好的约束，但其曲率$ k _ {\ rm {sym}} $表征了$ e_ {sym}（sym}（ρ）$2ρ_0$的$ e_ {sym}} $。使用各种核理论和文献中的相互作用的$ e_ {sym}（ρ）$的520多个计算预测了几种显着不同的$ k _ {\ rm {sym}}} - l $相关性。目的：如果$ e_ {sym}（sym}（ρ）$的唯一$ k _ {\ rm {sym}} - l $相关性可以牢固地建立，它将使我们能够逐步更好地约束$ e_ {sym}（sym}（ρ）$的高密度行为，我们会使用其SLOPE参数上的可用约束。 $ k _ {\ rm {sym}} - l $相关可能会影响中子星可观测值。方法：具有三个代表性$ k _ {\ rm {sym}}}的状态核方程式的元模型（EOSS） - L $相关函数用于为中子星生成多个EOSS。然后，我们检查$ k _ {\ rm {sym}} - l $相关性在外壳核过渡密度和压力以及规范中子星的半径和潮汐变形上的效果。结果：$ k _ {\ rm {sym}} - l $相关性都显着影响地壳核过渡密度和压力。它还对规范中子星的半径和潮汐变形性具有强烈的烙印，尤其是在小L值下。来自Ligo/处女座和NOCER的可用数据为坡度L设置了一些有用的限制，但无法区分三个代表性的$ k _ {\ rm {sym}}} - l $相关性。
Background: The nuclear symmetry energy $E_{sym}(ρ)$ encodes information about the energy necessary to make nuclear systems more neutron-rich. While its slope parameter L at the saturation density $ρ_0$ of nuclear matter has been relatively well constrained by recent astrophysical observations and terrestrial nuclear experiments, its curvature $K_{\rm{sym}}$ characterizing the $E_{sym}(ρ)$ around $2ρ_0$ remains largely unconstrained. Over 520 calculations for $E_{sym}(ρ)$ using various nuclear theories and interactions in the literature have predicted several significantly different $K_{\rm{sym}}-L$ correlations. Purpose: If a unique $K_{\rm{sym}}-L$ correlation of $E_{sym}(ρ)$ can be firmly established, it will enable us to progressively better constrain the high-density behavior of $E_{sym}(ρ)$ using the available constraints on its slope parameter L. We investigate if and by how much the different $K_{\rm{sym}}-L$ correlations may affect neutron star observables. Method: A meta-model of nuclear Equation of States (EOSs) with three representative $K_{\rm{sym}}-L$ correlation functions is used to generate multiple EOSs for neutron stars. We then examine effects of the $K_{\rm{sym}}-L$ correlation on the crust-core transition density and pressure as well as the radius and tidal deformation of canonical neutron stars. Results:The $K_{\rm{sym}}-L$ correlation affects significantly both the crust-core transition density and pressure. It also has strong imprints on the radius and tidal deformability of canonical neutron stars especially at small L values. The available data from LIGO/VIRGO and NICER set some useful limits for the slope L but can not distinguish the three representative $K_{\rm{sym}}-L$ correlations considered.
