Results for stack 1 (green) and stack 2 (red) in the IRX-β_UV and IRX-M_∗ plane. Left panel: IRX-β_UV diagram, for reference see Fig. 9. The stack 1 results are shown as diamonds, the tonalities of green represent the increase of the M_∗ from 9.75 (light green) to 11.50 (dark green). The filled red circles are the results from stack 2, the tonalities of red represent the two different bins in M_∗, 9.75 < log (M_∗ [ M_⊙ ] ) < 10.5 (light red) and 10.5 < log (M_∗ [ M_⊙ ] ) < 11.5 (dark red). Right panel: IRX-M_∗ diagram, for reference see Fig. 10. The stack 1 results are shown as diamonds, the tonalities of green represent the two different bins in β_UV, −1.7 <β_UV< −0.5 (light green) and −0.5 <β_UV< 0.5 (dark green). The filled red circles are the results from stack 2, the tonalities of red represent the increase of the β_UV from −1.7 (light red) to 0.5 (dark red).