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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