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题名: Scaling relation between Sunyaev-Zel
作者: Yuan, Qiang ;  Wan, Hao-Yi ;  Zhang, Tong-Jie ;  Liu, Ji-Ren ;  Feng, Long-Long ;  Fang, Li-Zhi
刊名: NEW ASTRONOMY
出版日期: 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
学科分类: Physics
通讯作者: Zhang, TJ , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
部门归属: [Yuan, Q; Zhang, TJ] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; [Yuan, Q] Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China; [Zhang, TJ] Chinese Acad Sci, Kavli Inst Theoret Phys China, Inst Theoret Phys, Beijing 100080, Peoples R China; [Zhang, TJ; Liu, JR; Fang, LZ] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA; [Feng, LL] Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China; [Feng, LL] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China; [Wan, HY] Beijing Planetarium, Beijing 100044, Peoples R China
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.
资助者: World Laboratory; National Science Foundation of China[10473002, 10573036, 10545002]; US NSF AST[05-07340]
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5399
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Yuan, Qiang,Wan, Hao-Yi,Zhang, Tong-Jie,et al. Scaling relation between Sunyaev-Zel[J]. NEW ASTRONOMY,2009,14(2):152-159.
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