| Abstract
| - We present results from optical, X-ray and radio observations of two X-ray bright ( $L_{\rm X} \sim 10^{45}$ erg s -1) galaxy clusters. Abell 1451 is at redshift $z=0.1989$ and has line-of-sight velocity dispersion $\sigma_{\rm v} = 1330$ km s -1 as measured from 57 cluster galaxies. It has regular X-ray emission without signs of substructure, a Gaussian velocity distribution, lack of a cooling flow region and significant deviations from the observed scaling laws between luminosity, temperature and velocity dispersion, indicating a possible merging shock. There is only one spectroscopically confirmed cluster radio galaxy, which is close to the X-ray peak. 1RXS J131423.6-251521 (for short RXJ1314-25) has $z=0.2474$ and $\sigma_{\rm v} = 1100$ km s -1 from 37 galaxies. There are two distinct galaxy groups with a projected separation of ≈700 kpc. The velocity histogram is bi-modal with a redshift-space separation of ~1700 km s -1, and the X-ray emission is double peaked. Although there are no spectroscopically confirmed cluster radio galaxies, we have identified a plausible relic source candidate.
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