论文标题
探测萨拉斯瓦蒂的心脏：通过全面的弱透镜和动力学分析评估大型星系群A2631的动态状态
Probing Saraswati's heart: evaluating the dynamical state of the massive galaxy cluster A2631 through a comprehensive weak-lensing and dynamical analysis
论文作者
论文摘要
在这项工作中，我们研究了位于Saraswati超集群核心的大型结构Abell 2631的动态状态。为此，我们首先解决了文献中有关集群的弱透明质量测定的张力。我们通过全面的弱透镜分析来做到这一点，探索剪切和放大数据集组合的功能。我们发现$ m_ {200}^{\ rm wl} = 8.7 _ { - 2.9}^{+2.5} \ times 10^{14} $ M $ _ \ odot $。我们还基于光谱构件的动力学确定了质量，对应于$ m_ {200}^{\ rm dy} = 12.2 \ pm3.0 \ pm3.0 \ times 10^{14} $ m $ _ \ odot $，在68％的Cl中保持弱透明估算值的68％。在合并后期观察到A2631的场景中，由X射线观测值与X射线观测结果相吻合的场景与X射线观测值相吻合。
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 $M_{200}^{\rm dy} = 12.2\pm3.0 \times 10^{14}$ 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.
