冷却混合星中伴随自旋下降压缩的解除禁闭特征
Signature of deconfinement with spin down compression in cooling hybrid stars
摘要：
中子星的热演化与它们的自旋下降以及由此产生的结构和化学成分的变化相耦合。这种耦合将恒星表面温度与旋转状态以及时间联系起来。我们报告了一个广泛的调查之间的耦合自旋下降和冷却的混合星经历了相变，以deconfined夸克物质在高密度存在于低旋转频率的恒星。重新分析了中子星的热平衡，将相变和相关的潜热自洽，并进行了数值计算，同时演变的恒星结构和温度分布。我们发现，在恒星的结构和化学成分的变化与引进一个纯夸克物质相的核心延迟冷却，并产生一个时期的增加表面温度的强和中等磁场强度的强超流星。如果夸克物质是超流的，那么解除禁闭的潜热会加强这种特征，并且它可以在纯夸克物质核心的形成过程中主导热平衡。在其他时候，它不太重要，不会显着改变热演化。
英文摘要：
The thermal evolution of neutron stars is coupled to their spin down and the resulting changes in structure and chemical composition. This coupling correlates stellar surface temperatures with rotational state as well as time. We report an extensive investigation of the coupling between spin down and cooling for hybrid stars which undergo a phase transition to deconfined quark matter at the high densities present in stars at low rotation frequencies. The thermal balance of neutron stars is re-analyzed to incorporate phase transitions and the related latent heat self-consistently, and numerical calculations are undertaken to simultaneously evolve the stellar structure and temperature distribution. We find that the changes in stellar structure and chemical composition with the introduction of a pure quark matter phase in the core delay the cooling and produce a period of increasing surface temperature for strongly superfluid stars of strong and intermediate magnetic field strength. The latent heat of deconfinement is found to reinforce this signature if quark matter is superfluid and it can dominate the thermal balance during the formation of a pure quark matter core. At other times it is less important and does not significantly change the thermal evolution.
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