Luminosity function from our simulation at z = 4 for three different lines of sight. The observer is set along the x-axis (circles), y-axis (boxes), and z-axis (diamonds), respectively. Triangles without error bars show the distribution of the intrinsic luminosity, hollow circles the observed luminosity function for z = 4.5 (Wang et al. 2009), and the flipped triangles the luminosity function for z = 3.7 as observed by Ouchi et al. (2008). The line depicts the log-linear fit to the data, yielding a power law with α = − 1.19. Number density is in units of Mpc-3/log (L).
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