Fraction of quasars with companions as a function of the aperture used for the search. The black, blue and green lines show this fraction in case of companions with different stellar masses (M_⋆> 10⁸M_⊙, >10^9.5M_⊙, >10¹⁰M_⊙, respectively), while the red lines represent the fraction of quasars with bright companions (SFR> 100 M_⊙ yr^-1) as a function of aperture, in the case of the Gonzalez-Perez14 (solid lines) and Gonzalez-Perez14.GRP (dashed lines) models.