GOLDRUSH. IV. z~3-7 galaxies

The obtained luminosity functions at z~4-7 cover a very wide UV luminosity range of ~0.002-2000L_UV_^*^ combined with previous studies, confirming that the dropout luminosity function is a superposition of the active galactic nucleus (AGN) luminosity function dominant at M_UV_<~-24 mag and the galaxy luminosity function dominant at M_UV_>~-22 mag, consistent with galaxy fractions based on 1037 spectroscopically identified sources.

Galaxy luminosity functions estimated from the spectroscopic galaxy fractions show the bright-end excess beyond the Schechter function at >~2{sigma} levels, possibly made by inefficient mass quenching, low dust obscuration, and/or hidden AGN activity. By analyzing the correlation functions at z~2-6 with HOD models, we find a weak redshift evolution (within 0.3dex) of the ratio of the star formation rate (SFR) to the dark matter accretion rate, SFR/(dM/dt)_h_, indicating the almost constant star formation efficiency at z~2-6, as suggested by our earlier work at z~4-7.