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arXiv 1302.1328astro-ph.HE
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X射线偏振法判别中子星模型

To differentiate neutron star models by X-ray polarimetry

Jiguang Lu, Renxin Xu, Hua Feng

摘要:

由于基本强相互作用的非微扰效应,脉冲星的性质至今仍不清楚,因此提出了不同的脉冲星内部结构模型,无论是常规的中子星还是夸克星。此外,在超核密度下,冷物质的夸克团物质状态被证明是夸克团物质,因此,夸克星可能是夸克团星。除了了解不同的表现形式,最重要的问题是找到一种有效的方法来观察区分这些模型。X射线偏振测量法在这里将发挥重要作用。本文主要研究夸克/夸克团星的热X射线偏振。在正常的中子星模型中,热X射线线偏振百分比通常高于~10%,而夸克/夸克团星的百分比几乎为零。因此,软X射线偏振测量法可能成为一种有效的夸克/夸克团星鉴别方法。因此,我们期望在未来几十年内探测到热X射线偏振。

英文摘要:

The nature of pulsar is still unknown because of non-perturbative effects of the fundamental strong interaction, and different models of pulsar inner structures are then suggested, either conventional neutron stars or quark stars. Additionally, a state of quark-cluster matter is conjectured for cold matter at supranuclear density, as a result pulsars could thus be quark-cluster stars. Besides understanding different manifestations, the most important issue is to find an effective way to observationally differentiate those models. X-ray polarimetry would play an important role here. In this letter, we focus on the thermal X-ray polarization of quark/quark-cluster stars. While the thermal X-ray linear polarization percentage is typically higher than ~10% in normal neutron star models, the percentage of quark/quark-cluster stars is almost zero. It could then be an effective method to identify quark/quark-cluster stars by soft X-ray polarimetry. We are therefore expecting to detect thermal X-ray polarization in the coming decades.

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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