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arXiv 1206.2238astro-ph.HE
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太阳辐射的热辐射和非热辐射:物理学的启示

Thermal and Non-thermal radiation from pulsars: hints of physics

Shi Dai, Renxin Xu

摘要:

恒星的热辐射和非热辐射携带着来自表面的重要信息,对致密恒星中致密物质的状态有着深刻的影响。对于非热射电辐射,子脉冲漂移现象表明脉冲星极帽上存在Ruderman-Sutherland型间隙放电和强的粒子束缚。传统的中子星模型很难提供如此高的结合能,而夸克团星的强自约束表面自然可以解决这个问题。至于热的,无特征的X射线光谱的恒星可能表明一个裸露的表面没有大气,和超相对论火球的伽马射线暴和超新星也将需要强大的自约束表面。脉冲星质量和质量-半径关系测量的最新成果进一步表明了一个刚性的状态方程和一个自约束表面。因此,我们推测脉冲星类致密星内部的物质可能处于夸克团相。夸克团恒星的表面是有色的,最初可能是裸露的。这样的表面不仅可以解释上述特征,而且可能促进了一个成功的核塌缩超新星,表面上方电子海的水回旋振荡可能是X射线光谱中检测到的这些吸收特征的原因。

英文摘要:

Thermal and non-thermal radiation from pulsars carries significant information from surface and would have profound implications on the state of dense matter in compact stars. For the non-thermal radio emission, subpulse drifting phenomena suggest the existence of Ruderman-Sutherland-like gap-sparking and strong binding of particles on pulsar polar caps. While conventional neutron star models can hardly provide such a high binding energy, the strong self-bound surface of quark-cluster stars can naturally solve this problem. As for the thermal one, the featureless X-ray spectra of pulsars may indicate a bare surface without atmosphere, and the ultrarelativistic fireball of gamma-ray bursts and supernovae would also require strong self-bound surfaces. Recent achievements in measuring pulsar mass and mass-radius relation further indicate a stiff equation of state and a self-bound surface. Therefore, we conjecture that matters inside pulsar-like compact stars could be in a quark-cluster phase. The surface of quark-cluster stars is chromatically confined and could initially be bare. Such a surface can not only explain above features, but may also promote a successful core-collapse supernova, and the hydro-cyclotron oscillation of the electron sea above the surface could be responsible for those absorption features detected in the X-ray spectrum.

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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