Mean value of the cosine of the angle between the orientation of the stars in the central galaxy and the direction of satellite galaxies as a function of the 3D galaxy separation, rescaled by the host halo |$r^{\rm crit}_{200}$|⁠. The central galaxies used for the left-hand panel are taken from the EAGLE L100 (11.3 < log₁₀(M_sub/[h⁻¹ M_⊙]) < 12.6) while in the right-hand panel they are taken from the cosmo-OWLS L200 simulation (12.6 < log₁₀(M_sub/[h⁻¹ M_⊙]) < 13.7). In both panels, the error bars represent 1σ bootstrap errors. Thicker lines indicate higher mass. The satellite distribution is aligned with the central galaxy out to |${\sim } 100r^{\rm crit}_{200}$|⁠. For |$r< 10r^{\rm crit}_{200}$| the alignment is substantially stronger for higher mass satellites.