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PERTURBATION THEORY OF THE COSMOLOGICAL LOG-DENSITY FIELD
Wang, Xin1,2,3; Neyrinck, Mark2; Szapudi, Istvan4; Szalay, Alex2; Chen, Xuelei1,5; Lesgourgues, Julien6,7; Riotto, Antonio6,8; Sloth, Martin6
2011-07-01
发表期刊ASTROPHYSICAL JOURNAL
卷号735期号:1
摘要The matter density field exhibits a nearly lognormal probability density distribution after entering into the nonlinear regime. Recently, it has been shown that the shape of the power spectrum of a logarithmically transformed density field is very close to the linear density power spectrum, motivating an analytic study of it. In this paper, we develop cosmological perturbation theory for the power spectrum of this field. Our formalism is developed in the context of renormalized perturbation theory, which helps to regulate the convergence behavior of the perturbation series, and of the Taylor series expansion we use for the logarithmic mapping. This approach allows us to handle the critical issue of density smoothing in a straightforward way. We also compare our perturbative results with simulation measurements.
关键词Cosmology: Theory Large-scale Structure Of Universe
DOI10.1088/0004-637X/735/1/32
收录类别SCI
语种英语
WOS记录号WOS:000291788300032
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8051
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
4.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
5.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
6.CERN, PII TII Div, CH-1211 Geneva 23, Switzerland
7.Ecole Polytech Fed Lausanne, ITP, CH-1015 Lausanne, Switzerland
8.Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
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Wang, Xin,Neyrinck, Mark,Szapudi, Istvan,et al. PERTURBATION THEORY OF THE COSMOLOGICAL LOG-DENSITY FIELD[J]. ASTROPHYSICAL JOURNAL,2011,735(1).
APA Wang, Xin.,Neyrinck, Mark.,Szapudi, Istvan.,Szalay, Alex.,Chen, Xuelei.,...&Sloth, Martin.(2011).PERTURBATION THEORY OF THE COSMOLOGICAL LOG-DENSITY FIELD.ASTROPHYSICAL JOURNAL,735(1).
MLA Wang, Xin,et al."PERTURBATION THEORY OF THE COSMOLOGICAL LOG-DENSITY FIELD".ASTROPHYSICAL JOURNAL 735.1(2011).
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