论文标题
Quark Deconfinept在中子星和混合恒星合并中的影响
Impact of quark deconfinement in neutron star mergers and hybrid star mergers
论文作者
论文摘要
我们描述了一个明确的重力波签名，以确定从辐射物质到脱凝的夸克物质的强相变的发生。与纯HADRONIC模型相比，这种相跃迁导致状态方程的强烈软化以及更紧凑的合并残留物。如果在合并过程中发生相变，则相对于潮汐变形频率，这会导致主导后重力波频率的特征增加。通过比较来自不同纯Hadronic和杂化模型的结果，我们表明可以从单一的同时测量前后的重力波中鉴定出强相变。此外，我们为混合恒星合并提供了新的结果，这些结果在灵感阶段中包含夸克物质。同样，对于这些系统，我们发现与纯Hadronic模型相比，Postmerger GW频率增加。因此，我们得出的结论是，同样在相对较低的密度下以强子夸克相过渡开始的混合恒星合并可能会导致在Postmerger GW信号中与在合并过程中进行相变的系统相同的特征特征。
We describe an unambiguous gravitational-wave signature to identify the occurrence of a strong phase transition from hadronic matter to deconfined quark matter in neutron star mergers. Such a phase transition leads to a strong softening of the equation of state and hence to more compact merger remnants compared to purely hadronic models. If a phase transition takes place during merging, this results in a characteristic increase of the dominant postmerger gravitational-wave frequency relative to the tidal deformability characterizing the inspiral phase. By comparing results from different purely hadronic and hybrid models we show that a strong phase transition can be identified from a single, simultaneous measurement of pre- and postmerger gravitational waves. Furthermore, we present new results for hybrid star mergers, which contain quark matter already during the inspiral stage. Also for these systems we find that the postmerger GW frequency is increased compared to purely hadronic models. We thus conclude that also hybrid star mergers with an onset of the hadron-quark phase transition at relatively low densities may lead to the very same characteristic signature of quark deconfinement in the postmerger GW signal as systems undergoing the phase transition during merging.
