论文标题
广角尾（WAT）星系群Abell 562的动力学
The Dynamics of the Wide-Angle Tailed (WAT) galaxy cluster Abell 562
论文作者
论文摘要
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$^{-1}$.这个相对较大的速度分散剂表明，要么是非常庞大的群集（$ m_ {dyn}> 6.9 \ times $ 10 $^{14} $ $ $ m_ {sun} $）和/或/或合并系统。合并模型由非高斯星系速度分布，可能的簇构件的伸长空间分布以及拉长的X射线发射气体支持。这种情况将产生群集内介质的大量流动运动，该介质可以施加足够的RAM压力来弯曲无线电喷气机。因此，我们的观察结果支持了一个模型，在该模型中，最近的非轴合并事件产生了塑造Abell 562中WAT所需的群集范围。
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.
