CHARACTERIZING GALAXY CLUSTERS WITH GRAVITATIONAL POTENTIAL
文献类型：期刊论文
| 作者 | Lau, Erwin T.1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2011-08-01 |
| 卷号 | 736期号:2页码:1 |
| 关键词 | cosmology: theory galaxies: clusters: general methods: numerical X-rays: galaxies: clusters |
| 英文摘要 | We propose a simple estimator for the gravitational potential of cluster-size halos using the temperature and density profiles of the intracluster gas based on the assumptions of hydrostatic equilibrium and spherical symmetry. Using high-resolution cosmological simulations of galaxy clusters, we show that the scaling relation between this estimator and the gravitational potential has a small intrinsic scatter of similar to 8%-15%, and it is insensitive to baryon physics outside the cluster core. The slope and the normalization of the scaling relation vary weakly with redshift, and they are relatively independent of the choice of radial range used and the dynamical states of the clusters. The results presented here provide a possible way for using the cluster potential function as an alternative to the cluster mass function in constraining cosmology using galaxy clusters. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | LAMBDA-CDM CLUSTERS ; DARK-MATTER HALOES ; X-RAY-CLUSTERS ; MASS FUNCTION ; INTRACLUSTER MEDIUM ; SUNYAEV-ZELDOVICH ; COSMOLOGICAL CONSTRAINTS ; OBSERVED GROWTH ; LOCAL SUPERCLUSTER ; GAS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000292977400070 |
| 源URL | [http://119.78.226.72/handle/331011/28105]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lau, Erwin T.. CHARACTERIZING GALAXY CLUSTERS WITH GRAVITATIONAL POTENTIAL[J]. ASTROPHYSICAL JOURNAL,2011,736(2):1. |
| APA | Lau, Erwin T..(2011).CHARACTERIZING GALAXY CLUSTERS WITH GRAVITATIONAL POTENTIAL.ASTROPHYSICAL JOURNAL,736(2),1. |
| MLA | Lau, Erwin T.."CHARACTERIZING GALAXY CLUSTERS WITH GRAVITATIONAL POTENTIAL".ASTROPHYSICAL JOURNAL 736.2(2011):1. |
入库方式： OAI收割
来源：上海天文台
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