Escape Velocity Mass of Abell 1063

We measure the radius-velocity phase-space edge profile for Abell 1063 using galaxy redshifts from arXiv:1409.3507 and arXiv:2109.03305. Combined with a cosmological model and after accounting for interlopers and sampling effects, we infer the escape velocity profile. Using the Poisson equation, we then directly constrain the gravitational potential profile and find excellent agreement between three different density models. For the NFW profile, we find log₁₀(M₂₀₀, crit)= 15.40+0.06-0.12M_, consistent to within 1σ of six recently published lensing masses. We argue that this consistency is due to the fact that the escape technique shares no common systematics with lensing other than radial binning. These masses are 2-4σ lower than estimates using X-ray data, in addition to earlier velocity dispersion estimates. We measure the 1D velocity dispersion within r₂₀₀ to be σᵥ = 1477⁺⁸⁷₋₉₉ km/s, which combined with our escape velocity mass, brings the dispersion for A1063 in-line with hydrodynamic cosmological simulations for the first time.