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Fig. 4


Fraction of star-forming galaxies as a function of redshift, defined according to a threshold of sSFR = 10-10/yr. Data from Haines et al. (2009) at low-z yield fractions computed by defining fixed (orange shaded) or resdshift-variable (cyan shaded) thresholds to star-forming activity estimated from LIR and thoroughly converted to SFR assuming a Kennicutt law.

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