标题： 星团-亚团合并与窄角尾射电源的形成 显示英文标题

标题： Cluster-subcluster Mergers and the Formation of Narrow-angle Tailed Radio Sources

摘要： 我们研究了一组包含15个阿贝尔星团的样本中的15个窄角尾(NAT)射电源的ROSAT PSPC X射线性质，这些星团中共有23个NAT射电源。 我们发现，拥有NAT射电源的星团比具有类似射电源数量但无明显射电源的星团显示出显著更高的次结构水平，这表明NAT射电源倾向于位于动力学复杂的系统中。 此外，NAT星系的速度分布与其他星团成员的速度分布相似；这些速度不足以产生弯曲射电喷流所需的冲击压力。 因此，我们提出了一个新的NAT形成模型，在该模型中，NAT与经历合并事件的动力学复杂星团相关联。 U形的NAT形态部分是由由于合并引起的ICM的整体运动弯曲了射电喷流而形成的。 显示英文摘要

摘要： We have examined the ROSAT PSPC X-ray properties of a sample of 15 Abell clusters containing 23 narrow-angle tailed (NAT) radio galaxies. We find that clusters with NATs show a significantly higher level of substructure than a similar sample of radio-quiet clusters, indicating that NAT radio sources are preferentially located in dynamically complex systems. Also, the velocity distribution of the NAT galaxies is similar to that of other cluster members; these velocities are inadequate for producing the ram pressure necessary to bend the radio jets. We therefore propose a new model for NAT formation, in which NATs are associated with dynamically complex clusters undergoing merger events. The U-shaped NAT morphology is produced in part by the merger-induced bulk motion of the ICM bending the jets.