论文标题
使用排除体积模型的夸克恒星的质量和半径关系
Mass and radius relations of quarkyonic stars using an excluded volume model
论文作者
论文摘要
受ISOSPIN对称夸克物质的排除体积模型的启发，我们为电荷中性夸克阶段构建了一个“排除体积”模型，该夸克中性相位仅包含中子。我们将此模型称为夸克中性物质。我们计算该模型的状态方程，并求解Tolman-Oppenhermer-Volkoff方程，以获得与中子星相关的质量和半径关系。对称Quarkyonic物质的模型最直接的扩展到夸克中性物质并不能满足中子星测量的质量半径约束。但是，我们表明，通过将适当的核相互作用纳入排除的体积模型中，可以产生质量 - 拉迪乌斯关系，该关系位于从二元中子恒星合并的重力波获得的约束中，以及中子星的最大质量测量。
Inspired by the excluded volume model for isospin symmetric quarkyonic matter, we construct an `excluded volume' model for a charge neutral quarkyonic phase whose hadronic sector contains only neutrons. We refer to this model as quarkyonic neutron matter. We compute the equation of state for this model and solve the Tolman-Oppenhermer-Volkoff equations to obtain mass and radius relations relevant for neutron stars. The most straightforward extension of the model for symmetric quarkyonic matter to quarkyonic neutron matter does not satisfy the mass radius constraints from neutron star measurements. However, we show that by incorporating appropriate nuclear interactions in the excluded volume model one can produce mass-radius relations that lie within the constraints obtained from gravitational waves of binary neutron star mergers and maximum mass measurements of neutron stars.
