ITP OpenIR  > SCI期刊论文
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
Scaling relation between Sunyaev-Zel
Source PublicationNEW ASTRONOMY
KeywordFully-developed Turbulence Log-poisson Statistics Galaxy Clusters Intergalactic Medium Intracluster Medium Distance Scale Universe Gas Intermittency Simulations
AbstractIt 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.
2009
ISSN1384-1076
Volume14Issue:2Pages:152-159
Subject AreaPhysics
Indexed BySCI
Funding OrganizationWorld Laboratory; National Science Foundation of China[10473002, 10573036, 10545002]; US NSF AST[05-07340] ; World Laboratory; National Science Foundation of China[10473002, 10573036, 10545002]; US NSF AST[05-07340] ; World Laboratory; National Science Foundation of China[10473002, 10573036, 10545002]; US NSF AST[05-07340] ; World Laboratory; National Science Foundation of China[10473002, 10573036, 10545002]; US NSF AST[05-07340]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5399
CollectionSCI期刊论文
Corresponding AuthorZhang, TJ , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
Recommended Citation
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.
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