混合星的反应界面模型无关分析
A model-agnostic analysis of hybrid stars with reactive interfaces
AI总结：
本研究构建模型无关状态方程，分析混合星界面转化速度对稳定性的影响，发现慢转化可产生新型稳定混合星，并探讨其形成机制与观测特征。
摘要：
我们研究了混合星，考虑了尖锐界面处强子-夸克转化速度对恒星稳定性的影响。状态方程通过结合模型无关的强子描述与夸克物质的恒声速模型构建。我们表明，当前LIGO/Virgo、NICER、低密度核物理和高密度微扰QCD的约束可以在两种情景下得到满足，分别对应低和高转变压力。如果界面处的转化速度较慢，则可能出现一类新的动力学稳定的混合天体，并且非常刚硬的强子状态方程不能被排除。这些天体中心可能达到核饱和密度数十倍的密度。我们讨论了这类新型混合星的可能形成机制及其观测识别的确凿证据。
英文摘要：
We study hybrid stars considering the effects on stellar stability of the hadron-quark conversion speed at the sharp interface. The equation of state is constructed by combining a model-agnostic hadronic description with a constant speed of sound model for quark matter. We show that current LIGO/Virgo, NICER, low-density nuclear and high-density perturbative QCD constraints can be satisfied in two scenarios, with low and high transition pressures. If the conversion speed at the interface is slow, a new class of dynamically stable hybrid objects is possible and very stiff hadronic equations of state cannot be discarded. Densities tens of times larger than the nuclear saturation density are possible at the center of these objects. We discuss possible formation mechanisms for the new class of hybrid stars and smoking guns for their observational identification.
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