We build upon the remarkable, model independent constraints on the equation of state of dense baryonic matter established recently by Annala et al. [1]. Using the quark-meson coupling model, an approach to nuclear structure based upon the self-consistent adjustment of hadron structure to the local meson fields, we show that, once hyperons are allowed to appear in dense matter in β-equilibrium, the equation of state is consistent with those constraints. As a result, while one cannot rule out the occurrence of quark matter in the cores of massive neutron stars, the available constraints are also compatible with the presence of hyperons.

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关于高音星的声速

我们建立在Annala等人最近建立的稠密重子物质状态方程的显着模型无关约束的基础上。[1]。使用夸克-介子耦合模型，一种基于强子结构对局部介子场的自洽调整的核结构方法，我们表明，一旦允许超子出现在β平衡的致密物质中，则方程状态与那些约束一致。结果，虽然不能排除大量中子星核心中存在夸克物质，但可用的约束条件也与超子的存在兼容。