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Fig. 2


Behavior of the LF Φ and M parameters as a function of the QSO redshift. The dark continuous line shows the fit model used in our simulations. The light gray markers show the best fit parameters for Φ and M when fitting the LF separately in each redshift bin, without any evolution model constraints. When constraining the evolution of the characteristic density, the best parameters are found to be log Φ∗ ,lowz = −5.85, αΦ = −0.77 ± 0.31, and zref = 2.09 ± 0.28.

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