SEARCHING FOR DARK MATTER ISOCURVATURE INITIAL CONDITIONS WITH N-BODY SIMULATIONS
刘杰(理);Liu, J
刊名INTERNATIONAL JOURNAL OF MODERN PHYSICS D
2012
卷号21期号:3页码:1250021
关键词Dark matter isocurvature perturbations N-body simulation
学科分类Astronomy & Astrophysics
DOI10.1142/S0218271812500216
英文摘要Small fraction of isocurvature perturbations may exist and correlate with adiabatic perturbations in the primordial perturbations. Naively switching off isocurvature perturbations may lead to biased results. We study the effect of dark matter isocurvature on the structure formation through N-body simulations. From the best-fit values, we run four sets of simulation with different initial conditions and different box sizes. We find that, if the fraction of dark matter isocurvature is small, we cannot detect its signal through matter power spectrum and two-point correlation function with large scale survey. However, the halo mass function can give an obvious signal. Compared to 5% difference on matter power spectrum, it can get 37% at z = 3 on halo mass function. This indicates that future high precise cluster count experiment can give stringent constraints on dark matter isocurvature perturbations.
收录类别SCI
WOS记录号WOS:000302738200001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224695
专题中国科学院高能物理研究所_理论物理室_期刊论文
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Liu J. SEARCHING FOR DARK MATTER ISOCURVATURE INITIAL CONDITIONS WITH N-BODY SIMULATIONS[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2012,21(3):1250021.
APA 刘杰.(2012).SEARCHING FOR DARK MATTER ISOCURVATURE INITIAL CONDITIONS WITH N-BODY SIMULATIONS.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,21(3),1250021.
MLA 刘杰."SEARCHING FOR DARK MATTER ISOCURVATURE INITIAL CONDITIONS WITH N-BODY SIMULATIONS".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 21.3(2012):1250021.
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