Cosmological primeval perturbation spectra in mildly non-linear regime

	Cosmological primeval perturbation spectra in mildly non-linear regime
	Li, XQ; Zhang, H
刊名	ASTROPHYSICS AND SPACE SCIENCE
	1997
卷号	250 期号:2 页码:175-188
关键词	TURBULENCE
ISSN号	0004-640X
英文摘要	The linear equation (2.14) describing the dynamical evolution of density perturbation in an expanding universe is not able to determine the form of power-spectrum \delta(k)\(2), i.e. the energy distribution with respect to wave numbers k. However, in the case of weak turbulence, we may construct the kinetic equation for the wave modes of an oscillating universe with k > k(J) (the Jean wavenumber). For the growing modes with long-wavelength in the range k < k(J) after recombination, the perturbations are of vortex-like and their relative amplitudes are large (but we still study the case delta rho/rho < 1); owing to the non-linear interactions, the system of the perturbations will finally towards a statistical equilibrium. In cases of both above, we obtain the primeval spectra in the form of [\delta(k)\(2)] similar to k(0), which are fitting to the self-similar clustering picture.
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]	TURBULENCE
收录类别	SCI
语种	英语
WOS记录号	WOS:000071045200001
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8426]
专题	紫金山天文台_期刊（老文献）
作者单位	Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Li, XQ,Zhang, H. Cosmological primeval perturbation spectra in mildly non-linear regime[J]. ASTROPHYSICS AND SPACE SCIENCE,1997,250(2):175-188.
APA	Li, XQ,&Zhang, H.(1997).Cosmological primeval perturbation spectra in mildly non-linear regime.ASTROPHYSICS AND SPACE SCIENCE,250(2),175-188.
MLA	Li, XQ,et al."Cosmological primeval perturbation spectra in mildly non-linear regime".ASTROPHYSICS AND SPACE SCIENCE 250.2(1997):175-188.