Phase-space diagram showing the relative line-of-sight velocities of cluster member galaxies as a function of distance from the cluster center. The red circles show the CO(2–1) emitters. The blue symbols show the [O II] emitters without CO(2–1) detection, among which the filled circles represent the spectroscopically confirmed ones, while the open circles are those with redshifts estimated from the ratio of emission line fluxes of two adjacent narrowband filters (NB912 and NB921), and the crosses are those detected only either in NB912 or NB921 (Hayashi et al. 2014). We set those redshifts to be 1.44 (for NB912) and 1.47 (for NB921), respectively. Green circles show the other spectroscopically confirmed cluster members (Hilton et al. 2010; Hayashi et al. 2014). The gray region shows a virialized area defined by Jaffé et al. (2015). The gray lines show the curves of constant v × R values (Noble et al. 2016). (right panel) Redshift histograms of spectroscopically confirmed galaxies. (upper panel) Cumulative fraction of the number of galaxies as a function of radius from the cluster center.