Fig. 3.
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Diagram explaining the definition of the SFR gradient. Using the output SFH from CIGALE, the SFR and M* obtained ti Myr ago are used to place the galaxy at the position where it was ti Myr ago on the SFR–M* plane. The SFR gradient is the angle between the line linking the position of the galaxy ti Myr ago and its position now and the line drawn from a constant SFR.
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