论文标题
对称能量对杂交恒星特性的影响
Symmetry energy effects on the properties of hybrid stars
论文作者
论文摘要
对称能量是同义不对称物质状态方程的重要组成部分。然而，对称能量的巨大不确定性仍然存在于膨胀密度下，在这种情况下，很可能会考虑强烈相互作用物质和夸克物质对称能的相变。在这项工作中，我们通过将混合恒星与强子Quark相跃迁一起研究对称能的性质。杂种恒星中奇怪的夸克物质（SQM）之间的相互作用是基于具有不同矢量和异载体通道的3味NJL模型，而核物质的状态方程（EOS）是通过考虑通过改变参数x，y和z的IMMDI-ST相互作用而获得的。我们的结果表明，来自IMMDI-ST和NJL模型的相互作用的各种参数和耦合常数可能导致强体Quark混合阶段中的对称能的趋势与强烈的趋势以及强体Quark相过渡的不同趋势。此外，已经发现，杂化恒星的半径和潮汐变形大多限制了对称能的密度依赖性，而观察到的杂化恒星的最大质量主要限制了对称核和夸克物质的EOS。
Symmetry energy is an important part of the equation of state of isospin asymmetry matter. However, the huge uncertainties of symmetry energy remain at suprasaturation densities, where the phase transitions of strongly interacting matter and the quark matter symmetry energy are likely to be taken into account. In this work, we investigate the properties of symmetry energy by using a hybrid star with the hadron-quark phase transition. The interaction among strange quark matter (SQM) in hybrid stars is based on a 3-flavor NJL model with different vector and isovector channels, while the equation of state (EOS) of the nuclear matter is obtained by considering the ImMDI-ST interaction by varying the parameters x, y, and z. Our results indicate that the various parameters and coupling constants of the interactions from the ImMDI-ST and NJL model can lead to widely different trends for the symmetry energy in the hadron-quark mixed phase and the different onsets of the hadron-quark phase transition. In addition, it has been found that the radii and tidal deformabilities of hybrid stars constrain mostly the density dependence of symmetry energy while the observed maximum masses of hybrid stars constrain mostly the EOS of symmetric nuclear and quark matter.
