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Morphology is often used to infer the state of relaxation of galaxy clusters.The regularity, symmetry, and degree to which a cluster is centrallyconcentrated inform quantitative measures of cluster morphology. The ClusterLensing and Supernova survey with Hubble Space Telescope (CLASH) used weak andstrong lensing to measure the distribution of matter within a sample of 25clusters, 20 of which were deemed to be relaxed based on their X-ray morphologyand alignment of the X-ray emission with the BCG. Towards a quantitativecharacterization of this important sample of clusters, we present uniformlyestimated X-ray morphological statistics for all 25 CLASH clusters. We compareX-ray morphologies of CLASH clusters with those identically measured for alarge sample of simulated clusters from the MUSIC-2 simulations, selected bymass. We confirm a threshold in X-ray surface brightness concentration of C>0.4for cool-core clusters, where C is the ratio of X-ray emission inside 100kpc/h70 compared to inside 500 kpc/h70. We report and compare morphologies ofthese clusters inferred from Sunyaev-Zeldovich Effect (SZE) maps of the hot gasand in from projected mass maps based on strong and weak lensing. We find astrong agreement in alignments of the orientation of major axes for thelensing, X-ray, and SZE maps of nearly all of the CLASH clusters at radii of500 kpc (approximately 0.5R500 for these clusters). We also find a strikingalignment of clusters shapes at the 500 kpc scale, as measured with X-ray, SZE,and lensing, with that of the near-infrared stellar light at 10 kpc scales forthe 20 "relaxed" clusters. This strong alignment indicates a powerful couplingbetween the cluster- and galaxy-scale galaxy formation processes.

The Morphologies and Alignments of Gas, Mass, and the Central Galaxies of CLASH Clusters of Galaxies