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GAS CLUMPING IN THE OUTSKIRTS OF Lambda CDM CLUSTERS
文献类型：期刊论文
| 作者 | Nagai, Daisuke1; Lau, Erwin T.2 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2011-04-10 |
| 卷号 | 731期号:1页码:1 |
| 关键词 | cosmology: theory galaxies: clusters: general methods: numerical X-rays: galaxies: clusters |
| 英文摘要 | Recent Suzaku X-ray observations revealed that the observed entropy profile of the intracluster medium (ICM) deviates significantly from the prediction of hydrodynamical simulations of galaxy clusters. In this work, we show that gas clumping introduces significant biases in X-ray measurements of the ICM profiles in the outskirts of galaxy clusters. Using hydrodynamical simulations of galaxy cluster formation in a concordance Lambda CDM model, we demonstrate that gas clumping leads to an overestimate of the observed gas density and causes flattening of the entropy profile. Our results suggest that gas clumping must be taken into account when interpreting X-ray measurements of cluster outskirts. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ADAPTIVE MESH REFINEMENT ; X-RAY OBSERVATIONS ; GALAXY CLUSTERS ; INTRACLUSTER MEDIUM ; VIRIAL RADIUS ; COSMOLOGICAL SIMULATIONS ; MASS MEASUREMENTS ; TEMPERATURE ; SUZAKU ; ENTROPY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000293126600010 |
| 源URL | [http://119.78.226.72/handle/331011/28114]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Yale Univ, Dept Phys, New Haven, CT 06520 USA 2.Partner Grp MPA, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nagai, Daisuke,Lau, Erwin T.. GAS CLUMPING IN THE OUTSKIRTS OF Lambda CDM CLUSTERS[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,731(1):1. |
| APA | Nagai, Daisuke,&Lau, Erwin T..(2011).GAS CLUMPING IN THE OUTSKIRTS OF Lambda CDM CLUSTERS.ASTROPHYSICAL JOURNAL LETTERS,731(1),1. |
| MLA | Nagai, Daisuke,et al."GAS CLUMPING IN THE OUTSKIRTS OF Lambda CDM CLUSTERS".ASTROPHYSICAL JOURNAL LETTERS 731.1(2011):1. |
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来源：上海天文台
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