The Dynamics of the Wide-Angle Tailed (WAT) galaxy cluster Abell 562
  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.
