⟨T_merge⟩ as a function of stellar mass. Contours represent the six different companion selection criteria and corresponding fitting coefficients from Kitzbichler & White (2008). These contours are all plotted at the median redshift of all pairs over all MC iterations (z ∼ 2.48). We also include the calculated ⟨T_merge⟩ values for Hyperion (red) and the field (blue) at each of projected separation criteria employed (i.e., r_proj ≤ 30 kpc (squares), 30 < r_proj ≤ 50 kpc (diamonds), and 50 < r_proj ≤ 150 kpc (crosses)). The ⟨T_merge⟩ values calculated for Hyperion are shorter in each bin due to the larger stellar masses of galaxies in Hyperion companion systems.