广角拖尾（WAT）星系团Abell 562的动力学
The Dynamics of the Wide-Angle Tailed (WAT) galaxy cluster Abell 562
摘要：
我们提出了第一个深入的动力学分析的原型广角尾（WAT）集群阿贝尔562。我们结合双子座观测与档案数据从文献中形成一个样本的76个集群成员和推导出的平均红移$0.1088 \pm 0.0004$和速度色散$919 \pm 116$公里秒$^{-1}$。这种相对较大的速度色散表明，要么是一个非常大的星团（$M_{dyn} > 6.9 \times$ 10 $^{14}$ $M_{sun}$）和/或合并系统。合并模型的支持下，一个非高斯星系的速度分布，拉长的空间分布可能的集群成员，和拉长的X射线发射气体。这种情况将产生集群内介质的整体流动运动，可以施加足够的冲压压力来弯曲无线电射流。因此，我们的观察支持的模型，其中最近的离轴合并事件产生的集群范围内的条件需要塑造的WAT在阿贝尔562。
英文摘要：
We present the first in depth dynamical analysis of the archetypal Wide-Angle Tailed (WAT) cluster Abell 562. We have combined Gemini observations with archival data from the literature to form a sample of 76 cluster members and derived a mean redshift of $0.1088 \pm 0.0004$ and a velocity dispersion of $919 \pm 116$ km s$^{-1}$. This relatively large velocity dispersion suggests either a very massive cluster ($M_{dyn} > 6.9 \times$ 10$^{14}$ $M_{sun}$) and/or a merger system. The merger model is supported by a non-Gaussian galaxy velocity distribution, an elongated spatial distribution of likely cluster members, and an elongated X-ray emitting gas. This scenario would generate the bulk flow motion of the intra-cluster medium that can exert enough ram pressure to bend the radio jets. Thus, our observations support the model in which a recent off-axis merger event produced the cluster wide conditions needed to shape the WAT in Abell 562.
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