The dynamical state and mass-concentration relation of galaxy clusters
文献类型：期刊论文
| 作者 | Ludlow, Aaron D.1; Navarro, Julio F.2; Li, Ming3,4; Angulo, Raul E.3; Boylan-Kolchin, Michael5; Bett, Philip E.1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 427期号:2页码:1322-1328 |
| 关键词 | galaxies: clusters: general cosmology: theory dark matter |
| ISSN号 | 0035-8711 |
| 英文摘要 | We use the Millennium Simulation series to study how the dynamical state of dark matter haloes affects the relation between mass and concentration. We find that a large fraction of massive systems are identified when they are substantially out of equilibrium and in a particular phase of their dynamical evolution: the more massive the halo, the more likely it is found at a transient stage of high concentration. This state reflects the recent assembly of massive haloes and corresponds to the first pericentric passage of recently accreted material when, before virialization, the kinetic and potential energies reach maximum and minimum values, respectively. This result explains the puzzling upturn in the mass-concentration relation reported in recent work for massive haloes; indeed, the upturn disappears when only dynamically relaxed systems are considered in the analysis. Our results warn against applying simple equilibrium models to describe the structure of rare, massive galaxy clusters and urge caution when extrapolating scaling laws calibrated on lower mass systems, where such deviations from equilibrium are less common. The evolving dynamical state of galaxy clusters ought to be carefully taken into account if cluster studies are to provide precise cosmological constraints. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | COLD DARK-MATTER ; HALO CONCENTRATIONS ; POWER SPECTRUM ; EVOLUTION ; SIMULATIONS ; CONSTRAINTS ; DEPENDENCE ; COSMOLOGY ; PROJECT ; SCATTER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000311413500037 |
| 公开日期 | 2013-01-31 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/7971]  |
| 专题 | 紫金山天文台_毫米波和亚毫米波技术实验室 |
| 作者单位 | 1.Argelander Inst Astron, D-53121 Bonn, Germany 2.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada 3.Max Planck Inst Astrophys, D-85740 Garching, Germany 4.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 5.Univ Calif Irvine, Ctr Galaxy Evolut, Irvine, CA 92697 USA |
| 推荐引用方式 GB/T 7714 | Ludlow, Aaron D.,Navarro, Julio F.,Li, Ming,et al. The dynamical state and mass-concentration relation of galaxy clusters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,427(2):1322-1328. |
| APA | Ludlow, Aaron D.,Navarro, Julio F.,Li, Ming,Angulo, Raul E.,Boylan-Kolchin, Michael,&Bett, Philip E..(2012).The dynamical state and mass-concentration relation of galaxy clusters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,427(2),1322-1328. |
| MLA | Ludlow, Aaron D.,et al."The dynamical state and mass-concentration relation of galaxy clusters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 427.2(2012):1322-1328. |
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来源：紫金山天文台
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