论文标题
具有外在状态方程的超质量中子星的准平台序列
Quasi-stationary sequences of hyper massive neutron stars with exotic equations of state
论文作者
论文摘要
在这项工作中，我们研究了差异旋转，有限温度和陌生度对超质量中子星（HMN）的准静止序列的影响。我们生成差异旋转和均匀旋转恒星的恒定休息质量序列。与DD2参数集的相对论平均场模型的框架中描述了与恒星内部相关的核次物质。我们还考虑使用BHB $λC.$状态方程（EOS）考虑奇怪的$λ$超子。此外，我们在不同温度下使用这些组合物探测中子星（NS）的行为。我们报告说，在EOS中添加Hyperons可以显着增强旋转现象。此外，升高温度可以使旋转更强。我们还研究了陌生和热影响对T/W不稳定性的影响。最后，我们分析了从微分旋转到均匀旋转的稳定过渡后，A NS的平衡序列。与核子EOS相比，在此转换过程中，相对于角动量损失的频率下降显着较小。
In this work, we study the effect of differential rotation, finite temperature and strangeness on the quasi stationary sequences of hyper massive neutron stars (HMNS). We generate constant rest mass sequences of differentially rotating and uniformly rotating stars. The nucleonic matter relevant to the star interior is described within the framework of the relativistic mean field model with the DD2 parameter set. We also consider the strange $Λ$ hyperons using the BHB$Λϕ$ equation of state (EoS). Additionally, we probe the behaviour of neutron stars (NS) with these compositions at different temperatures. We report that the addition of hyperons to the EoS produces a significant boost to the spin-up phenomenon. Moreover, increasing the temperature can make the spin-up more robust. We also study the impact of strangeness and thermal effects on the T/W instability. Finally, we analyse equilibrium sequences of a NS following a stable transition from differential rotation to uniform rotation. The decrease in frequency relative to angular momentum loss during this transition is significantly smaller for EoS containing hyperons, compared to nucleonic EoS.
