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Fig. 10.

image

NGC4470 in the 12 J-PLUS bands. This nearby galaxy is ideal to illustrate how a typical HII galaxy is seen by J-PLUS, with many young star-forming knots highlighted on the bluest filters (u and J0378; covering [O II] emission line) and J0660 (covering Hα and [N II] emission lines). As expected, these knots are essentially absent in the reddest bands, which instead trace the underlying old stellar population of the galaxy.

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