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Cosmological primeval perturbation spectra in mildly non-linear regime
Li, XQ; Zhang, H
AbstractThe 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.
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000071045200001
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Document Type期刊论文
AffiliationAcad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
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.
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