期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 731, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/731/1/L10
关键词
cosmology: theory; galaxies: clusters: general; methods: numerical; X-rays: galaxies: clusters
资金
- NSF [AST-1009811]
- NASA ATP [NNX11AE07G]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1009811] Funding Source: National Science Foundation
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据