The intracluster light as a tracer of the total matter density distribution: a view from simulations

被引：58

作者：

Asensio, Isaac Alonso ^{[1
,2
]}

Dalla Vecchia, Claudio ^{[1
,2
]}

Bahe, Yannick M. ^{[3
]}

Barnes, David J. ^{[4
]}

Kay, Scott T. ^{[5
]}

机构：

[1] Inst Astrofis Canarias, C Via Lactea S-N, E-38205 Tenerife, Spain

[2] Univ La Laguna, Dept Astrofis, Av Astrofis Francisco Sanchez S-N, E-38206 Tenerife, Spain

[3] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[4] MIT, Dept Phys, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[5] Univ Manchester, Jodrell Bank, Sch Nat Sci, Dept Phys & Astron,Ctr Astrophys, Manchester M13 9PL, Lancs, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 494卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

methods: numerical; galaxies: clusters: general; GALAXY FORMATION; EAGLE SIMULATIONS; CLUSTERS; RATES; EVOLUTION;

D O I：

10.1093/mnras/staa861

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

By using deep observations of clusters of galaxies, it has been recently found that the projected stellar mass density closely follows the projected total (dark and baryonic) mass density within the innermost similar to 140 kpc. In this work, we aim to test these observations using the Cluster-EAGLE simulations, comparing the projected densities inferred directly from the simulations. We compare the iso-density contours using the procedure of Montes & Trujillo, and find that the shape of the stellar mass distribution follows that of the total matter even more closely than observed, although their radial profiles differ substantially. The ratio between stellar and total matter density profiles in circular apertures shows a slope close to -1, with a small dependence on the cluster's total mass. We propose an indirect method to calculate the halo mass and mass density profile from the radial profile of the intracluster stellar mass density.

引用

页码：1859 / 1864

页数：6

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