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The Bayesian MAMPOSSt mass/orbit modeling algorithm is used to jointly fitthe distribution of elliptical, spiral (and irregular), and lenticular galaxiesin projected phase space, on 3 stacked clusters (with normalized positions andvelocities) of 54 regular clusters from the WINGS survey, with at least 30member velocities. Our stacked clusters contain ~5000 galaxies with availablevelocities and morphological types. 30 runs of MAMPOSSt with different priorsare presented. The highest MAMPOSSt likelihoods are obtained for generalizedNFW models with steeper inner slope, free-index Einasto models, and double NFWmodels for the cluster and the brightest cluster galaxy. However, there is nostrong Bayesian evidence for a steeper profile than the NFW model. The massconcentration matches the predictions from cosmological simulations.Ellipticals usually trace best the mass distribution, while S0s are close.Spiral galaxies show increasingly radial orbits at increasing radius, as do S0son two stacks, and ellipticals on one stack. The inner orbits of all threetypes in the 3 stacks are consistent with isotropy. Spiral galaxies shouldtransform rapidly into early-types given their much larger extent in clusters.Outer radial orbits are expected for the spirals, a consequence of their recentradial infall into the cluster. The less radial orbits we find for early-typescould be related to the longer time spent by these galaxies in the cluster. Wedemonstrate that two-body relaxation is too slow to explain the inner isotropyof the early types, which suggests that inner isotropy is the consequence ofviolent relaxation during major cluster mergers or dynamical friction and tidalbraking acting on subclusters. We propose that the inner isotropy of theshort-lived spirals is a selection effect of spirals passing only once throughpericenter before being transformed into early-type morphologies.

Structural and dynamical modeling of WINGS clusters. II. The orbital anisotropies of elliptical, spiral and lenticular galaxies