Phase-space diagram for Coma. The black dashed lines represent the escape velocity for Coma, calculated using a concentration index (c) of 5, M₂₀₀ = 5.1 × 10¹⁴ M_⊙ and r₂₀₀ = 1.8 Mpc (Gavazzi et al. 2009). Galaxies inside the escape velocity ‘trumpet’ are considered to be within the cluster, while galaxies on the outside edge of the trumpet are considered to be falling into the cluster. The light grey shaded cone represents the virialised zone (Oman et al. 2013). The g − r colour of each galaxy is given by the colour scale in colourbar.