论文标题
中子恒星内部直接URCA和超流量的影响在I型X射线爆发和X射线超爆发
Impacts of the direct URCA and Superfluidity inside a Neutron Star on Type-I X-Ray Bursts and X-Ray Superbursts
论文作者
论文摘要
我们研究了中微子冷却机制内部中微子恒星（NS）核心对I型X射线爆发和X射线超爆的光曲线的影响。从NS热演化的几个观察结果，可以指出快速中微子冷却的物理过程，例如直接URCA（DU）过程。它们显着降低了NSS的表面温度，尽管核子超流体可以抑制冷却效果。在本研究中，着重于DU过程和核子超流体，我们使用一般性的恒星进化代码研究了NS冷却对X射线爆发的影响。我们发现DU过程导致发现较长的复发时间和较高的峰值光度，这可能会被中子超流体阻碍。我们还将爆发模型应用于与{\ it Clocked burster} gs 1826 $ - $ 24的比较，以及由碳点火触发的Superburst的复发时间。这些效果在一定范围的二进制参数和国家方程的不确定性中很重要。
We investigate the impacts of neutrino cooling mechanism inside the neutron star (NS) core on the light curves of type-I X-ray bursts and X-ray superbursts. From several observations of NS thermal evolution, physical processes of fast neutrino cooling, such as the direct Urca (DU) process, are indicated. They significantly decrease the surface temperature of NSs, though the cooling effect could be suppressed by nucleon superfluidity. In the present study, focusing on the DU process and nucleon superfluidity, we investigate the effects of NS cooling on the X-ray bursts using a general-relativistic stellar-evolution code. We find that the DU process leads find the longer recurrence time and the higher peak luminosity, which could be obstructed by the neutrons superfluidity. We also apply our burst models to the comparison with {\it Clocked burster} GS 1826$-$24, and to the recurrence time of superburst triggered by carbon ignition. These effects are significant within a certain range of binary parameters and uncertainty of the NS equation of state.
