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Compact groups of galaxies (CGs) show members with morphologicaldisturbances, mainly products of galaxy-galaxy interactions, thus making themideal systems to study galaxy evolution, in high-density environment. Tounderstand how this environment affects the properties of galaxies, we select asample of 340 CGs in the Stripe 82 region, for a total of 1083 galaxies, and asample of 2281 field galaxies as a control sample. By performing amulti-wavelength morphological fitting process using S-PLUS data, we divide oursample into early-type (ETG), late-type (LTG), and transition galaxies usingthe r-band S\'ersic index and the colour (u-r). We find a bimodal distributionin the plane of the effective radius-S\'ersic index, where a secondary"peculiar" galaxy population of smaller and more compact galaxies is found inCGs, which is not observed in the control sample. This indicates that galaxiesare undergoing a morphological transformation in CGs. In addition, we findsignificant statistical differences in the distribution of specific StarFormation Rate (sSFR) when we compare both environments for LTGs and ETGs. Wealso find a higher fraction of quenched galaxies and a lower median sSFR in CGsthan in the control sample, suggesting the existence of environmental effectsfavoring the cessation of star formation, regardless of galaxy type. Ourresults support the notion that CGs promote morphological and physicaltransformations, highlighting their potential as ideal systems for galaxypre-processing.

Galaxy evolution in compact groups I: Revealing a transitional galaxy population through a multiwavelength approach