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Using 324 numerically modelled galaxy clusters we investigate the radial andgalaxy-halo alignment of dark matter subhaloes and satellite galaxies orbitingwithin and around them. We find that radial alignment depends on distance tothe centre of the galaxy cluster but appears independent of the dynamical stateof the central host cluster. Furthermore, we cannot find a relation betweenradial alignment of the halo or galaxy shape with its own mass. We report thatbacksplash galaxies, i.e. objects that have already passed through the clusterradius but are now located in the outskirts, show a stronger radial alignmentthan infalling objects. We further find that there exists a population of wellradially aligned objects passing very close to the central cluster's centrewhich were found to be on highly radial orbit.

The Three Hundred project: shapes and radial alignment of satellite, infalling, and backsplash galaxies