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Register a new userProbing Saraswatis heart: evaluating the dynamical state of the massive galaxy cluster A2631 through a comprehensive weak-lensing and dynamical analysis
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Added by
Rog\\'erio Monteiro-Oliveira
Publication date
2020
fields
Physics
and research's language is
English
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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 $M_{200}^{rm wl} = 8.7_{-2.9}^{+2.5} times 10^{14}$ M$_odot$. We also determined the mass based on the dynamics of spectroscopic members, corresponding to $M_{200}^{rm dy} = 12.2pm3.0 times 10^{14}$ M$_odot$, 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.
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