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Reexamining the universality of the Burkert profile on cluster scales: Dark matter cores
Xue, YJ; Wu, XP
2001-04-01
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS D
卷号10期号:2页码:239-244
摘要The Burkert profile is a competing candidate for the analytic approximation of virialized dark halos especially when dark matter particles have a finite cross-section for elastic collisions. In this paper we reexamine its universality in massive systems, using an ensemble of 45 nearby X-ray clusters and 20 distant X-ray/lensing clusters. Despite the fact that this empirical profile turns out a great success on galactic scales and also reproduces approximately the X-ray observed surface brightness profiles of clusters, the dark matter cores of clusters predicted by the Burkert profile are too large to be reconciled with the strong gravitational lensing measurements. Specifically, the typical dark halo cores of clusters represented by the Burkert profile are about 0.2 Mpc, and only a small fraction (similar to 1/4) Of clusters can have compact cores smaller than 0.1 Mpc. This will constitute a critical challenge to the Burkert profile as a universal dark matter density law over entire mass ranges.
收录类别SCI
语种英语
WOS记录号WOS:000168216100005
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8567
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Beijing Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Xue, YJ,Wu, XP. Reexamining the universality of the Burkert profile on cluster scales: Dark matter cores[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2001,10(2):239-244.
APA Xue, YJ,&Wu, XP.(2001).Reexamining the universality of the Burkert profile on cluster scales: Dark matter cores.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,10(2),239-244.
MLA Xue, YJ,et al."Reexamining the universality of the Burkert profile on cluster scales: Dark matter cores".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 10.2(2001):239-244.
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