The effect of primordial non-Gaussianity on the topology of large-scale structure
The effect of primordial non-Gaussianity on the topology of large-scale structure
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原初非高斯性对大尺度结构拓扑的影响
DOI:
10.1111/j.1365-2966.2008.12944.x
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发表时间:
2008
影响因子:
4.8
通讯作者:
Hikage C
中科院分区:
文献类型:
--
作者:
Hikage C
We study the effect of primordial non-Gaussianity on the development of large-scale cosmic structure using high-resolutionN-body simulations. In particular, we focus on the topological properties of the ‘cosmic web’, quantitatively characterized by the Minkowski functionals (MFs), for models with quadratic non-linearities with different values of the usual non-Gaussianity parameterfNL. In the weakly non-linear regime (the amplitude of mass density fluctuations σ0< 0.1), we find that analytic formulae derived from perturbation theory agree with the numerical results within a few per cent of the amplitude of each MF when |fNL| < 1000. In the non-linear regime, the detailed behaviour of the MFs as functions of threshold density deviates more strongly from the analytical curves, while the overall amplitude of the primordial non-Gaussian effect remains comparable to the perturbative prediction. When smaller-scale information is included, the influence of primordial non-Gaussianity becomes increasingly significant statistically due to decreasing sample variance. We find that the effect of the primordial non-Gaussianity with |fNL| = 50 is comparable to the sample variance of mass density fields with a volume of 0.125(h−1Gpc)3when they are smoothed by Gaussian filter at a scale of 5h−1Mpc. The detectability of this effect in actual galaxy surveys will strongly depend on residual uncertainties in cosmological parameters and galaxy biasing.
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DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
X. Kang;P. Norberg;J. Silk
通讯作者:
J. Silk
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
T. Matsubara
通讯作者:
T. Matsubara
DOI:
10.1086/377220
发表时间:
2003-02
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
E. Komatsu;A. Kogut;M. Nolta;C. Bennett;M. Halpern;G. Hinshaw;N. Jarosik;M. Limon;S. Meyer;L. Page;D. Spergel;G. Tucker;L. Verde;Edward J. Wollack;E. L. W. Princeton;Nasa Gsfc;Ubc;U. Chicago;Brown;Ucla
通讯作者:
E. Komatsu;A. Kogut;M. Nolta;C. Bennett;M. Halpern;G. Hinshaw;N. Jarosik;M. Limon;S. Meyer;L. Page;D. Spergel;G. Tucker;L. Verde;Edward J. Wollack;E. L. W. Princeton;Nasa Gsfc;Ubc;U. Chicago;Brown;Ucla
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
F. Atrio;S. Gottlöber;J. P. Mücket
通讯作者:
J. P. Mücket
DOI:
10.1086/175542
发表时间:
1994
期刊:
arXiv: Astrophysics
影响因子:
--
作者:
F. Bernardeau;L. Kofman
通讯作者:
L. Kofman