Fig. 15
BPT diagram for radio sources in XXL-S. The red points are those for which EW([O III]) < 5 Å, and the black points are those for which EW([O III]) > 5 Å. The error bars were calculated according to Eqs. (13) and (14). The solid red line is the extreme starburst line from Kewley et al. (2001) and the dashed blue line is the star-forming galaxy line from Kauffmann et al. (2003).
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