Phase-space diagram of the Coma cluster. Red, yellow, and blue circles mark our H I detections, while grey circles represent the underlying distribution of all spectroscopically confirmed Coma sources from Healy et al. (2021). Logarithmic histograms of appropriate colour along the horizontal and vertical axes show the marginalised distributions of cluster centre distance and line-of-sight velocities, respectively. The dashed line is drawn at the upper boundary of the statistically most virialised galaxy population from Eqs. (3) and (4) of Pasquali et al. (2019) using p = 1. The black curve is the cluster escape velocity as a function of distance from the centre, calculated via Eq. (2) of Jaffé et al. (2015). The black crosses highlight sources with UV (Smith et al. 2010) and/or H_α (Yagi et al. 2010) tails. Finally, the red circles indicate galaxies identified as AGN in previous literature (Mahajan et al. 2010; Gavazzi et al. 2011; Toba et al. 2014).