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Fig. 3.


Top: Gini-M20 diagram for the final sample of starburst and main sequence galaxies analyzed in this work (in red filled circles and blue empty squares, respectively). Galaxies above the black continuous line are morphological mergers, according to Lotz et al. (2008). The typical uncertainties of Gini and M20 are shown by the representative error bars in the lower left corner. Bottom: histogram distribution (for SBs and MS) of the mergerness parameter, defined as the difference between the measured Gini coefficient and that required to classify the galaxy as a morphological merger. It shows that the majority of galaxies classified as mergers according to this criterion are also starbursts.

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