Median specific star formation rate as a function of redshift for four models with a 68% confidence limit based on the whole probability distribution function with comparison of results from different studies (Noeske et al. 2007; Daddi et al. 2007; Stark et al. 2009; Reddy et al. 2012b) and results from studies accounting for nebular emission effect (Stark et al. 2013; Smit et al. 2013). At z ~ 6, we show results with +NEB+Lyα option for declining and rising SFHs. Typical errors are ~ 0.3 dex. The dashed line shows the relation expected from Bouché et al. (2010) for an exponentially increasing star formation at a fixed M⋆ = 109.5 M⊙. The dotted line given by sSFR = 2 Gyr-1 is shown to guide the eye.
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