Scaling relation between Sunyaev-Zel

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	Scaling relation between Sunyaev-Zel
	Yuan, Qiang; Wan, Hao-Yi; Zhang, Tong-Jie; Liu, Ji-Ren; Feng, Long-Long; Fang, Li-Zhi; Zhang, TJ , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
刊名	NEW ASTRONOMY
	2009
卷号	14 期号:2 页码:152-159
关键词	Fully-developed Turbulence Log-poisson Statistics Galaxy Clusters Intergalactic Medium Intracluster Medium Distance Scale Universe Gas Intermittency Simulations
ISSN号	1384-1076
英文摘要	It has been revealed recently that, in the scale free range, i.e. from the scale of the onset of nonlinear evolution to the scale of dissipation, the velocity and mass density fields of cosmic baryon fluid are extremely well described by the self-similar log-Poisson hierarchy. As a consequence of this evolution, the relations among various physical quantities of cosmic baryon fluid should be scale invariant, if the physical quantities are measured in cells on scales larger than the dissipation scale, regardless the baryon fluid is in virialized dark halo, or in pre-virialized state. We examine this property with the relation between the Compton parameter of the thermal Sunyaev-Zel'dovich effect, y(r), and X-ray luminosity, L-x(r), where r being the scale of regions in which y and L-x are measured. According to the self-similar hierarchical scenario of nonlinear evolution, one should expect that (1) in the y(r) - L-x(r) relation, y(r) = 10(A(r))[Lx(r)](alpha(r)) the coefficients A(r) and a(r) are scale-invariant: (2) The relation y(r) = 10(A(r))[L-x(r)](alpha(r)) given by cells containing collapsed objects is also available for cells without collapsed objects, only if r is larger than the dissipation scale. These two predictions are well established with a scale decomposition analysis of observed data, and a comparison of observed y(r) - L,(r) relation with hydrodynamic simulation samples. The implication of this result on the characteristic scales of non-gravitational heating is also addressed. (C) 2008 Elsevier B.V. All rights reserved.
学科主题	Physics
URL标识	查看原文
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5399]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Zhang, TJ , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Qiang,Wan, Hao-Yi,Zhang, Tong-Jie,et al. Scaling relation between Sunyaev-Zel[J]. NEW ASTRONOMY,2009,14(2):152-159.
APA	Yuan, Qiang.,Wan, Hao-Yi.,Zhang, Tong-Jie.,Liu, Ji-Ren.,Feng, Long-Long.,...&Zhang, TJ , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.(2009).Scaling relation between Sunyaev-Zel.NEW ASTRONOMY,14(2),152-159.
MLA	Yuan, Qiang,et al."Scaling relation between Sunyaev-Zel".NEW ASTRONOMY 14.2(2009):152-159.