Aims.In order to investigate whether gravitational interactions between galaxies are able to modify their structural properties, we determine the Kormendy relation (KR) for a sample of isolated early-type galaxies (ETG) for which we have measured several photometric parameters. This relation is compared with that obtained for a sample of ETG of the Coma Cluster, and with that obtained for a sample of perturbed S0 galaxies contained within high-density environments.
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Nigoche-Netro et al. (2007) studied this question.
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