2DARK天文志

脉冲星是夸克星的可能证据 

徐仁新（北京大学） 2007.9.11 第2版 

Kambrian译

摘要：尽管脉冲星的发现已经有40年的历史，但由于在超出原子核密度下冷物质方面研究的不确定性，我们至今仍无法断定脉冲星这类星体中物质的真正状态。早在70年前朗道的时代，核物质（和中子星相关）便被认为是脉冲星内层物质的候选者之一。而另一方面，19世纪60年代发展起来的粒子物理标准模型中提出了夸克间相互作用的渐进自由度，据此夸克物质（联系于夸克星）成了另外一个候选者。因此，人们不得不把注意力集中于天体物理的观测以回答脉冲星的本质问题。在这篇文章里，我将对支持夸克星理论的证据和线索做一个总结，同时提出未来实验中能够实现的夸克星的明确证据。

Original Text:

Possible evidence that pulsars are quark stars

Renxin Xu (PKU)

Abstract: It is a pity that the real state of matter in pulsar-like stars is still not determined confidently because of the uncertainty about cold matter at supranuclear density, even 40 years after the discovery of pulsar. Nuclear matter (related to neutron stars) is one of the speculations for the inner constitution of pulsars even from the Landau's time more than 70 years ago, but quark matter (related to quark stars) is an alternative due to the fact of asymptotic freedom of interaction between quarks as the standard model of particle physics develops since 1960s. Therefore, one has to focus on astrophysical observations in order to answer what the nature of pulsars is. In this presentation, I would like to summarize possible observational evidence/hints that pulsar-like stars could be quark stars, and to address achievable clear evidence for quark stars in the future experiments.