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arXiv 1003.0263astro-ph.SR
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热演化中子星中夸克退禁闭加热信号

Signal of quark deconfinement in thermal evolution neutron stars with deconfinement heating

Kang Miao, Wang Xiao-dong, Zheng Xiao-ping

摘要:

随着中子星自旋下降和收缩,退禁闭相变可以继续发生,导致能量释放(所谓的退禁闭加热)的情况下的一级相变。将相变与能量释放自洽地结合起来,研究了中子星的热演化。我们发现,自旋下降过程中解禁闭加热的出现不仅导致了冷却延迟,而且导致了恒星表面温度的升高。对于中等和弱磁场强度的恒星,可能存在一个表面温度升高的时期。特别是在具有弱磁场的恒星中,当核内出现夸克物质时,可以产生表面温度的急剧跳变。我们认为,这可能是解禁闭夸克物质存在的证据。结果表明,在中子星的热演化过程中,退禁闭加热促进了这种特征信号的出现。

英文摘要:

As neutron stars spin-down and contract, the deconfinement phase transition can continue to occur, resulting in energy release(so-called deconfinement heating) in case of the first-order phase transition. The thermal evolution of neutron stars is investigated to combine phase transition and the related energy release self-consistently. We find that the appearance of deconfinement heating during spin-down result in not only the cooling delay but also the increase of surface temperature of stars. For stars characterized by intermediate and weak magnetic field strength, a period of increasing surface temperature could exist. Especially, a sharp jump in surface temperature can be produced as soon as quark matter appears in the core of stars with a weak magnetic field. We think that this may serve as evidence for the existence of deconfinement quark matter. The results show that deconfinement heating facilitates the emergence of such characteristic signature during the thermal evolution process of neutron stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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