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arXiv 2111.04791astro-ph.HE
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临近中子星的X射线目录

Towards an X-ray inventory of nearby neutron stars

Armin Vahdat, Bettina Posselt, Andrea Santangelo, George G. Pavlov

摘要:

中子星的X射线辐射使我们能够探测它们的温度、几何形状和磁层特性。目前的X射线发射中子星的数量不足以排除观测偏差,这种偏差可能是由于对中子星的距离、年龄或位置知之甚少而产生的。克服这种偏差的一种方法是创建一个距离有限的样本,并进行足够深入的观察。为了更好地对附近的($\lesssim$ 2kpc)中子星群体进行采样,我们开始了对中子星的XMM-牛顿巡天,以测量它们的X射线通量或导出相应的约束上限。我们使用不同的能带和探测器研究了附近14个可能的X射线对应物。除了我们新的XMM-Newton数据,我们还考虑了档案数据和目录。我们讨论了源属性,并检查了X射线源的替代对应物。在我们新的XMM-牛顿数据中,我们发现了两个脉冲星对应物候选者与$4σ$以上的显着性和一个候选者与$3.5σ$结合EPIC相机检测似然。我们还报告了在4XMM-DR 10目录中探测到8个射电望远镜的潜在X射线对应物,这些文献中还没有报道。

英文摘要:

The X-ray emission of neutron stars enables a probe of their temperatures, geometries, and magnetospheric properties. The current number of X-ray emitting pulsars is insufficient to rule out observational biases that may arise from poorly known distance, age, or location of the neutron stars. One approach to overcome such biases is to create a distance-limited sample with sufficiently deep observations. With the aim of better sampling of the nearby ($\lesssim$ 2kpc) neutron stars population, we started an XMM-Newton survey of pulsars to measure their X-ray fluxes or derive respective constraining upper limits. We investigated 14 nearby pulsars for potential X-ray counterparts using different energy bands and detectors. In addition to our new XMM-Newton data, we also considered archival data and catalogs. We discuss source properties and also check for alternative counterparts to the X-ray sources. In our new XMM-Newton data, we found two pulsar counterpart candidates with significance above over $4σ$ and one candidate with $3.5σ$ by combining EPIC camera detection likelihoods. We also report the detection of potential X-ray counterparts to 8 radio pulsars in the 4XMM-DR10 catalog which have not been reported in the literature.

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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