Fig. 6
V − R (left panel) and R − I (right panel) color map of I Zw 18, displayed in the range between 0 and 0.4 mag and –0.9 and 0 mag, respectively. Crosses mark the SF regions NW and SE. The region termed ω by P02 (cf. Fig. 1) is indicated at the southeastern part of the image. The insets in the left panel show a magnified view of a shell ≈ 5′′ northward of region NW.
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