2021MNRAS.501..756M

In this work, we investigate the dynamical state of the galaxy cluster Abell 2631, a massive structure located at the core of the Saraswati supercluster. To do this, we first solve a tension found in the literature regarding the weak-lensing mass determination of the cluster. We do this through a comprehensive weak-lensing analysis, exploring the power of the combination of shear and magnification data sets. We find M₂₀₀^wl = 8.7_–2.9^+2.5 ×10¹⁴ M_☉. We also determined the mass based on the dynamics of spectroscopic members, corresponding to M₂₀₀^ dy^ = 12.2±3.0 ×10¹⁴ M_☉, consistent within a 68 per cent CL with the weak-lensing estimate. The scenarios provided by the mass distribution and dynamics of galaxies are reconciled with those provided by X-ray observations in a scenario where A2631 is observed at a late stage of merging.