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Energetic feedback from Supernovae and stellar winds can drive galacticwinds. Dwarf galaxies, due to their shallower potential wells, are assumed tobe more vulnerable to this phenomenon. Metal loss through galactic winds isalso commonly invoked to explain the low metal content of dwarf galaxies. Ourmain aim in this paper is to show that galactic mass cannot be the onlyparameter determining the fraction of metals lost by a galaxy. In particular,the distribution of gas must play an equally important role. We perform 2-Dchemo-dynamical simulations of galaxies characterized by different gasdistributions, masses and gas fractions. The gas distribution can change thefraction of lost metals through galactic winds by up to one order of magnitude.In particular, disk-like galaxies tend to loose metals more easily thanroundish ones. Consequently, also the final metallicities attained by modelswith the same mass but with different gas distributions can vary by up to onedex. Confirming previous studies, we also show that the fate of gas and freshlyproduced metals strongly depends on the mass of the galaxy. Smaller galaxies(with shallower potential wells) more easily develop large-scale outflows,therefore the fraction of lost metals tends to be higher.

The fate of heavy elements in dwarf galaxies - the role of mass and geometry