Lbol is the bolometric luminosity produced by star formation and possible accretion on black holes, and LE is the Eddington luminosity of the system considering its total mass and taking into account the presence of dust in the ejected gas. We find a strong anticorrelation with the Eddington ratio lamba_E and the optical depth measured at 1500 Angstrom tau_1500: tau_1500 scales as lambda_E to -0.63. We also find that lambdaE increases with redshift. We can then conclude that in the case where all light is produced by star formation, galaxies exceeding a specific star formation rate sSFR > 13 Gyr-1 develop powerful radiation fluxes that are able to clean the galaxy of its dust. This result is supported by the failure to detect the continuum due to heated dust from star formation in observations by ALMA of three super-early systems.
