论文标题
二进制中子星合并，作为状态夸克 - 戴隆跨界方程的探针
Binary neutron star mergers as a probe of quark-hadron crossover equations of state
论文作者
论文摘要
预计从二元中子星（NS）合并中检测到的未来重力波（GW）检测器中检测到的重力辐射可以探测状态的高密度方程（EOS）。我们执行第一个二进制合并的模拟，这些模拟采用了夸克 - 哈德隆跨界（QHC）EOS的各种参数化。这些是由HADRONIC EOS（$ N_ {B} <2〜N_0 $）和Quark-Matter EOS（$ N_ {B}> 〜5〜N_0 $）的组合构建的，其中$ N_ {B} $和$ n_0 $是Baryon Number Mentem and Baryon Number Mentive和核饱和度密度。在交叉密度（$ 2〜n_0 <n_ {b} <5〜n_0 $）上，QHC eoss不断变软，同时保持较硬的速度比HADRONIC和一阶相过渡EOSS，从而达到了强烈相关的夸克物质的刚度。这种增强的刚度可导致邮政NS的寿命明显更长，而对于纯Hadronic EOS而言。我们发现这些eoss的双重性质使得它们的最大chirp gw频率$ f_ {max} $属于软EOS的类别，而Postmerger阶段的主要峰值频率（$ f_ {peak} $）落在柔软的僵硬的Hadronic EOS之间。在特征性GW频率中对这种双重性质的观察将为QCD的交叉密度存在强烈相互作用的夸克物质提供至关重要的证据。
It is anticipated that the gravitational radiation detected in future gravitational wave (GW) detectors from binary neutron star (NS) mergers can probe the high-density equation of state (EOS). We perform the first simulations of binary NS mergers which adopt various parametrizations of the quark-hadron crossover (QHC) EOS. These are constructed from combinations of a hadronic EOS ($n_{b} < 2~n_0$) and a quark-matter EOS ($n_{b} >~5~n_0$), where $n_{b}$ and $n_0$ are the baryon number density and the nuclear saturation density, respectively. At the crossover densities ($2~ n_0 < n_{b} < 5~ n_0$) the QHC EOSs continuously soften, while remaining stiffer than hadronic and first-order phase transition EOSs, achieving the stiffness of strongly correlated quark matter. This enhanced stiffness leads to significantly longer lifetimes of the postmerger NS than that for a pure hadronic EOS. We find a dual nature of these EOSs such that their maximum chirp GW frequencies $f_{max}$ fall into the category of a soft EOS while the dominant peak frequencies ($f_{peak}$) of the postmerger stage fall in between that of a soft and stiff hadronic EOS. An observation of this kind of dual nature in the characteristic GW frequencies will provide crucial evidence for the existence of strongly interacting quark matter at the crossover densities for QCD.
