中子星并合中夸克-强子交叉状态方程的全同性关系
Neutron Star Merger Universality Relations for a Quark--Hadron Crossover Equation of State
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中文总结 AI 辅助
该研究探讨中子星并合中强子-夸克交叉相变对引力波的影响，发现QHC21状态方程下长时标引力波发射更显著，并指出某些可观测量的全同性关系偏差可作为相变发生的观测信号。
中文摘要 AI 辅助
在中子星并合过程中，从强子物质到夸克物质的交叉相变可能在产生的引力辐射中引发有趣的观测后果。特别是，交叉密度区域（核饱和密度的2-5倍）内压力的增加，可能导致并合后阶段高频（约2-3.5千赫兹）引力波发射的持续时间延长。我们基于QHC19和QHC21状态方程，研究了一系列包含或不包含到夸克物质交叉相变的状态方程的全同性关系。我们发现，在QHC21状态方程中，长持续时间并合后引力波发射更为显著。随后，我们考虑了在强子状态方程模拟中已识别的各种可观测量之间的全同性关系。我们表明，某些量的全同性关系存在偏差，这些偏差最终可能提供观测信号，表明这种相变已经发生。
英文摘要
A crossover transition from hadronic to quark matter during the merger of neutron stars can lead to interesting observational consequences in the emergent gravitational radiation. In particular, the increased pressure in the crossover density region ($2-5$ times the nuclear saturation density) can lead to an extended duration of high-frequency ($\sim 2-3.5$ kHz) gravitational wave emission during the post-merger epoch. We study the universality relations for a variety of equations of state with and without a crossover transition to a quark mater based upon the QHC19 and QHC21 EoSs. We find that the long-duration post-merger gravitational-wave emission is more pronounced in the QHC21 EoS. We then consider universality relations among various observable quantities that have been identified in simulations with hadronic equations of state. We show that there are deviations from the universality relations for some quantities that may ultimately provide an observational signal that such a transition has occurred.
发表机构
- University of Notre Dame（圣母大学）
- North Carolina Central University（北卡罗来纳中央大学）
机构由 AI 辅助整理，请以论文原文为准。
