Scaling relation between Sunyaev-Zel'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field
Yuan, Qiang1,2; Wan, Hao-Yi7; Zhang, Tong-Jie1,3,4; Liu, Ji-Ren4; Feng, Long-Long5,6; Fang, Li-Zhi4
刊名NEW ASTRONOMY
2009-02-01
卷号14期号:2页码:152-159
关键词Cosmology: theory Large-scale structure of universe X-rays: galaxies: clusters Hydrodynamics Methods: numerical
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Astronomy & Astrophysics
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]FULLY-DEVELOPED TURBULENCE ; LOG-POISSON STATISTICS ; GALAXY CLUSTERS ; INTERGALACTIC MEDIUM ; INTRACLUSTER MEDIUM ; DISTANCE SCALE ; UNIVERSE ; GAS ; INTERMITTENCY ; SIMULATIONS
收录类别SCI
语种英语
WOS记录号WOS:000261022700007
公开日期2011-12-08
内容类型期刊论文
源URL[http://159.226.72.40/handle/332002/1595]  
专题紫金山天文台_星系中的恒星形成研究团组
作者单位1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2.Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Kavli Inst Theoret Phys China, Inst Theoret Phys, Beijing 100080, Peoples R China
4.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
5.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
7.Beijing Planetarium, Beijing 100044, 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'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field[J]. NEW ASTRONOMY,2009,14(2):152-159.
APA Yuan, Qiang,Wan, Hao-Yi,Zhang, Tong-Jie,Liu, Ji-Ren,Feng, Long-Long,&Fang, Li-Zhi.(2009).Scaling relation between Sunyaev-Zel'dovich effect and X-ray luminosity and scale-free evolution of cosmic baryon field.NEW ASTRONOMY,14(2),152-159.
MLA Yuan, Qiang,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):152-159.
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