[Mg IV] vs. Hu-12 luminosities of the selected regions (top) and for every spaxel (bottom). Different colors and symbols are used to identify the regions of each object. In the top panel, the labels of the points are the names of the regions. The Spearman correlation coefficient, r_s, is indicated. The solid and dashed red lines are the best fit (log y = 0.30 + 0.98log x) and best linear fit (log y = ( − 0.29 ± 0.18)+log x), respectively, to the luminosities of the regions.