Scale transformations, tree-level perturbation theory and the cosmological matter bispectrum

	Scale transformations, tree-level perturbation theory and the cosmological matter bispectrum
	Pan, Jun 1,2; Coles, Peter 2,3; Szapudi, Istvan 4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2007-12-21
卷号	382 期号:4 页码:1460-1464
关键词	cosmology : theory large-scale structure of universe
英文摘要	Scale transformations have played an extremely successful role in studies of cosmological large-scale structure by relating the non-linear spectrum of cosmological density fluctuations to the linear primordial power at longer wavelengths. Here, we generalize this approach to investigate the usefulness of scale transformations for non-linear higher order statistics, specifically the bispectrum. We find that the bispectrum predicted by perturbation theory at tree level can be rescaled to match the results of full numerical simulations in the weakly and intermediately non-linear regimes, especially at high redshifts, with an accuracy that is surprising given the simplicity of the procedure used. This discovery not only offers a simple practical way of calculating the matter bispectrum but also suggests that scale transformations may yet yield even deeper insights into the physics of hierarchical clustering.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	NONLINEAR EVOLUTION ; POWER SPECTRA ; HALO-MODEL ; SIMULATIONS
收录类别	SCI
语种	英语
WOS记录号	WOS:000251672100006
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/15865]
专题	紫金山天文台_南极天文中心
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 3.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales 4.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Pan, Jun,Coles, Peter,Szapudi, Istvan. Scale transformations, tree-level perturbation theory and the cosmological matter bispectrum[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,382(4):1460-1464.
APA	Pan, Jun,Coles, Peter,&Szapudi, Istvan.(2007).Scale transformations, tree-level perturbation theory and the cosmological matter bispectrum.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,382(4),1460-1464.
MLA	Pan, Jun,et al."Scale transformations, tree-level perturbation theory and the cosmological matter bispectrum".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 382.4(2007):1460-1464.