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When a galaxy falls into a cluster, its outermost parts are the most affectedby the environment. In this paper, we are interested in studying the influenceof a dense environment on different galaxy's components to better understandhow this affects the evolution of galaxies. We use, as laboratory for thisstudy, the Hydra cluster which is close to virialization; yet it still showsevidence of substructures. We present a multi-wavelength bulge-discdecomposition performed simultaneously in 12 bands from S-PLUS data for 52galaxies brighter than m$_{r}$= 16. We model the galaxies with a Sersic profilefor the bulge and an exponential profile for the disc. We find that thesmaller, more compact, and bulge-dominated galaxies tend to exhibit a reddercolour at a fixed stellar mass. This suggests that the same mechanisms(ram-pressure stripping and tidal stripping) that are causing the compaction inthese galaxies are also causing them to stop forming stars. The bulge size isunrelated to the galaxy's stellar mass, while the disc size increases withgreater stellar mass, indicating the dominant role of the disc in the overallgalaxy mass-size relation found. Furthermore, our analysis of the environmentunveils that quenched galaxies are prevalent in regions likely associated withsubstructures. However, these areas also harbour a minority of star-forminggalaxies, primarily resulting from galaxy interactions. Lastly, we find that~37 percent of the galaxies exhibit bulges that are bluer than their discs,indicative of an outside-in quenching process in this type of denseenvironments.

Bulge-disc decomposition of the Hydra cluster galaxies in 12 bands