Fig. 1.
Colour–magnitude diagrams of SDSS+GALEX galaxies at z < 0.2, uncorrected (top panel) and corrected (bottom panel) by intrinsic extinction caused by dust. The horizontal dashed lines represent the green valley region. Each contour line represents approximately the same number of galaxies. The colours in the vertical bar on both panels identify the number of galaxies for each bin within the diagrams.
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