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Abstract We quantify galaxy overdensities around three high-redshift quasars with known C ii 158 μ m companions: PJ231–20 ( z = 6.59), PJ308–21 ( z = 6.24), and J0305–3150 ( z = 6.61). Recent SCUBA2 imaging revealed the presence of 17 submillimeter galaxies (SMGs) with sky separations 0.′7 6 quasars and suggest that only wide-field observations, such as MUSE, ALMA, or JWST mosaics, can reveal a comprehensive picture of large-scale structure around quasars in the first billion years of the universe.
Meyer et al. (Tue,) studied this question.