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首页> 外文期刊>The Astrophysical journal >A Chandra Observation of Abell 13: Investigating the Origin of the Radio Relic
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A Chandra Observation of Abell 13: Investigating the Origin of the Radio Relic

机译:钱德拉对阿贝尔13的观察:调查无线电遗物的起源

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We present results from the Chandra X-ray observation of Abell 13, a galaxy cluster that contains an unusual noncentral radio source, also known as a radio relic. This is the first pointed X-ray observation of Abell 13, providing a more sensitive study of the properties of the X-ray gas. The X-ray emission from Abell 13 is extended to the northwest of the X-ray peak and shows substructure indicative of a recent merger event. The cluster X-ray emission is centered on the bright galaxy H of Slee et al. We find no evidence for a cooling flow in the cluster. A knot of excess X-ray emission is coincident with the other bright elliptical galaxy F. This knot of emission has properties similar to the enhanced emission associated with the large galaxies in the Coma Cluster. With these Chandra data we are able to compare the properties of the hot X-ray gas with those of the radio relic from VLA data, to study the interaction of the X-ray gas with the radio-emitting electrons. Our results suggest that the radio relic is associated with cooler gas in the cluster. We suggest two explanations for the coincidence of the cooler gas and radio source. First, the gas may have been uplifted by the radio relic from the cluster core. Alternatively, the relic and cool gas may have been displaced from the central galaxy during the cluster merger event.
机译:我们介绍了Chandra X射线对Abell 13的观测结果,Abell 13是一个包含不寻常的非中心无线电源(也称为无线电遗迹)的星系团。这是对Abell 13的首次有针对性的X射线观察,为X射线气体的性质提供了更为敏感的研究。来自Abell 13的X射线辐射扩展到X射线峰的西北部,并显示了指示最近合并事件的子结构。 X射线团簇的发射集中在Slee等人的明亮星系H上。我们没有发现集群中有冷却流的证据。多余的X射线发射结与另一个明亮的椭圆形星系F一致。这种发射结具有与昏迷星系中大型星系相关的增强发射相似的特性。利用这些Chandra数据,我们能够将热X射线气体的特性与VLA数据中的放射性遗迹的特性进行比较,以研究X射线气体与放射电子的相互作用。我们的结果表明,无线电文物与星团中的低温气体有关。我们建议用两种解释来说明较冷的气体和无线电源的重合。首先,气体可能已被星团核心的无线电遗迹所吸引。可替代地,在集群合并事件期间,文物和冷气可能已从中央星系中移出。

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