4.7 Article

Chandra observations of the lensing cluster EMSS 1358+6245:: Implications for self-interacting dark matter

期刊

ASTROPHYSICAL JOURNAL
卷 572, 期 1, 页码 66-78

出版社

UNIV CHICAGO PRESS
DOI: 10.1086/340296

关键词

dark matter; galaxies : clusters : individual (EMSS 1358+6245); X-rays : galaxies

向作者/读者索取更多资源

We present Chandra observations of EMSS 1358+ 6245, a relaxed cooling flow cluster of galaxies at z = 0.328. We employ a new deprojection technique to construct temperature, gas, and dark matter profiles. We confirm the presence of cool gas in the cluster core, and our deprojected temperature profile for the hot component is isothermal over 30 kpc < r < 0.8 Mpc. Fitting the mass pro le to a Navarro-Frenk-White model yields r(s) = 153(-83)(+161) kpc and c = 8.4(-2.3)(+3.4) We find good agreement between our dark matter pro le and weak gravitational lensing measurements. We place an upper limit of 42 kpc (90% confidence limit) on the size of any constant-density core. We compare this result to recent simulations and place a conservative upper limit on the dark matter particle-scattering cross section of 0.1 cm(2) g(-1). This limit implies that the cross section must be velocity-dependent if the relatively shallow core mass profiles of dwarf galaxies are a direct result of dark matter self-interaction.

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。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据