Mean fractional accretion rate for the nine red spectroscopic subsamples h ₇₀ Gyr ⁻¹ dex ⁻¹. The thick lines are for mergers with red galaxies from the imaging sample and the thin lines are for mergers with blue galaxies from the imaging sample. The solid lines are the merger rate under assumption of t _{merge, i} = t _{KW, i} and the dashed lines are for the merger rate under assumption of t _{merge, i} = t _{BT, i} .