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Fig. 3


Left panel. Fraction of red (U − B > 1.0) galaxies as a function of the density contrast, in equipopulated density bins, for a luminosity-selected volume-limited sample with MB ≤ −19.3 − z in the redshift range 0.5 ≤ z ≤ 0.7. Density is computed with the 5th nearest neighbour method, using volume limited tracers (MB ≤ −19.3 − z). The values on the x axis represent the median density values in each density bin. Red squares are for density based on counts (“CWD”, see text), while orange triangles for density weighted by stellar mass (“MWD”). Vertical error bars are computed applying the binomial formula. Solid line is the linear fit of squares, dashed line the linear fit of triangles. The slopes of the fits with their errors are quoted in the text. Right panel. As in the left panel, but in this case, before computing the MWD to each galaxy it has been assigned the entire set of properties (mass, colour etc.) of another galaxy near in redshift, chosen randomly. This way galaxy positions and redshift are not correlated with galaxy properties. See the text for further details.

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