Ratio of the unobscured (LFUV) versus obscured star formation (3.89*L24), as a function of oxygen abundance, 12 +log (O/H), for the DGS sample. The multiplicative factor of 3.89 in the denominator arises from the calibration coefficient that corrects the observed FUV emission for extinction following Hao et al. (2011) (i.e., LFUV(corr) = LFUV (obs) + 3.89 × L24). Galaxies are color-coded according to metallicity with increasing oxygen abundances ranging from black then blue, green and yellow to red colors. Data points correspond to global galaxy fluxes.
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