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We study the interplay between several properties determined from Optical anda combination of Optical/Radio measurements, such as the effective Oxygen yield(y_eff), the star formation efficiency, gas metallicity, depletion time, gasfraction, and baryonic mass(M_bar), among others. We use spectroscopic datafrom the SDSS survey, and HI information from the ALFALFA survey to build astatistically significant sample of more than 5,000 galaxies. Furthermore, wecomplement our analysis with data from the GASS and COLD GASS surveys, and witha sample of star-forming galaxies from the Virgo cluster. Additionally, we havecompared our results with predictions from the EAGLE simulations, finding avery good agreement when using the high-resolution run. We explore in detailthe M_bar-y_eff relation, finding a bimodal trend that can be separated whenthe stellar age of galaxies is considered. On one hand, y_eff increases withM_bar for young galaxies(log(t_r) < 9.2 yr), while y_eff shows ananti-correlation with M_bar for older galaxies (log(t_r) > 9.4 yr). While acorrelation between M_bar and y_eff has been observed and studied before,mainly for samples of dwarfs and irregular galaxies, their anti-correlatedcounterpart for massive galaxies has not been previously reported. The EAGLEsimulations indicate that AGN feedback must have played an important role intheir history by quenching their star formation rate, whereas low mass galaxieswould have been affected by a combination of outflows and infall of gas.

Oxygen yields as a constraint on feedback processes in galaxies