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Fig. 2.
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Number density of active SMBHs per unit comoving volume, nAGN(z), in the ILLUSTRISTNG100 simulation (solid blue lines) vs. the observational values at redshift zero for unobscured (hydrogen column density NH ≲ 1023 cm−2) high-luminosity (L ≥ 1043.2 erg s−1) AGNs.
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