Scaling relation between Sunyaev-Zel'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field
Yuan Q(袁强); Yuan, Q; Wan, HY; Zhang, TJ; Liu, JR; Feng, LL; Fang, LZ
刊名NEW ASTRONOMY
2009
卷号14期号:2页码:#REF!
关键词Cosmology: theory Large-scale structure of universe X-rays: galaxies: clusters Hydrodynamics Methods: numerical
学科分类Astronomy & Astrophysics
DOI10.1016/j.newast.2008.07.004
通讯作者Zhang, TJ (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
文章类型Article
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.
类目[WOS]Astronomy & Astrophysics
收录类别SCI
WOS记录号WOS:000261022700007
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226533
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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Yuan Q,Yuan, Q,Wan, HY,et al. Scaling relation between Sunyaev-Zel'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field[J]. NEW ASTRONOMY,2009,14(2):#REF!.
APA 袁强.,Yuan, Q.,Wan, HY.,Zhang, TJ.,Liu, JR.,...&Fang, LZ.(2009).Scaling relation between Sunyaev-Zel'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field.NEW ASTRONOMY,14(2),#REF!.
MLA 袁强,et al."Scaling relation between Sunyaev-Zel'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field".NEW ASTRONOMY 14.2(2009):#REF!.
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