Weighted median n as a function of wavelength for different morphological types of galaxies. Colour coding is the same as in Fig. 5. The error bars show the uncertainty of the median (calculated as , where σ is the standard deviation and N is the number of galaxies in the sample). The x-points are slightly shifted along the wavelength axis in order to make the errors readable. The numbers before the parenthesis show the total number of each galaxy type that are located in the inner region (middle panel) and inside high-local-density regions (bottom panel). The numbers inside parentheses denote the total number of each galaxy type that are in the outer region (middle panel) and inside low-local-density regions (bottom panel).
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