Probing Saraswati's heart: evaluating the dynamical state of the massive galaxy cluster A2631 through a comprehensive weak-lensing and dynamical analysis

被引：7

作者：

Monteiro-Oliveira, R. ^{[1
,2
]}

Soja, A. C. ^{[3
]}

Ribeiro, A. L. B. ^{[2
]}

Bagchi, J. ^{[4
]}

Sankhyayan, S. ^{[5
]}

Candido, T. O. ^{[3
]}

Flores, R. R. ^{[3
]}

机构：

[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, R Do Matao 1226, BR-05508090 Sao Paulo, SP, Brazil

[2] Univ Estadual Santa Cruz, Dept Ciencias Exatas & Tecnol, Lab Astrofis Teor & Observac, BR-45650000 Ilheus, BA, Brazil

[3] Inst Fed Mato Grosso do Sul, Campus Corumba,Rua Pedro Medeiros S-N, BR-79310110 Corumba, Brazil

[4] Interuniv Ctr Astron & Astrophys, Post Bag 4, Pune 411007, Maharashtra, India

[5] TIFR, Natl Ctr Radio Astrophys, Post Bag 3, Pune 411007, Maharashtra, India

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 501卷 / 01期

关键词：

gravitational lensing: weak; galaxies: clusters: individual: Abell 2631; dark matter; large-scale structure of Universe; DARK-MATTER; X-RAY; RICH CLUSTERS; XMM-NEWTON; ABELL; 1758; SUBSTRUCTURE; LOCUSS; DISTRIBUTIONS; ANISOTROPY; EVOLUTION;

D O I：

10.1093/mnras/staa3575

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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(wl) = 8.7(-2.9)(+2.5) x 10(14) M-circle dot. We also determined the mass based on the dynamics of spectroscopic members, corresponding to M-200(dy) = 12.2 +/- 3.0 x 10(14) M-circle dot, consistent within a 68 per cent CL with the weaklensing 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.

引用

页码：756 / 768

页数：13

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