The non-linear matter and velocity power spectra in f(R) gravity
文献类型：期刊论文
| 作者 | Li, Baojiu1; Hellwing, Wojciech A.1,2,3; Koyama, Kazuya4; Zhao, Gong-Bo4,5 ; Jennings, Elise6,7; Baugh, Carlton M.1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2013 |
| 卷号 | 428期号:1页码:743-755 |
| 关键词 | methods: numerical cosmology: theory cosmology: dark energy cosmology: large-scale structure of Universe |
| 英文摘要 | We study the matter and velocity divergence power spectra in a f(R) gravity theory and their time evolution measured from several large-volume N-body simulations with varying box sizes and resolution. We find that accurate prediction of the matter power spectrum in f(R) gravity places stronger requirements on the simulation than is the case with Lambda cold dark matter (Lambda CDM) because of the non-linear nature of the fifth force. Linear perturbation theory is shown to be a poor approximation for the f(R) models, except when the chameleon effect is very weak. We show that the relative differences from the fiducial Lambda CDM model are much more pronounced in the non-linear tail of the velocity divergence power spectrum than in the matter power spectrum, which suggests that future surveys which target the collection of peculiar velocity data will open new opportunities to constrain modified gravity theories. A close investigation of the time evolution of the power spectra shows that there is a pattern in the evolution history, which can be explained by the properties of the chameleon-type fifth force in f(R) gravity. Varying the model parameter vertical bar f(R0)vertical bar, which quantifies the strength of the departure from standard gravity, mainly varies the epoch marking the onset of the fifth force, as a result of which the different f(R) models are in different stages of the same evolutionary path at any given time. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000318227900069 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5992]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Durham, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England 2.Univ Warsaw, Interdisciplinary Ctr Math & Computat Modelling I, PL-02106 Warsaw, Poland 3.Univ Zielona Gora, Inst Astron, PL-65001 Zielona Gora, Poland 4.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 6.Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA 7.Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA |
| 推荐引用方式 GB/T 7714 | Li, Baojiu,Hellwing, Wojciech A.,Koyama, Kazuya,et al. The non-linear matter and velocity power spectra in f(R) gravity[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,428(1):743-755. |
| APA | Li, Baojiu,Hellwing, Wojciech A.,Koyama, Kazuya,Zhao, Gong-Bo,Jennings, Elise,&Baugh, Carlton M..(2013).The non-linear matter and velocity power spectra in f(R) gravity.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,428(1),743-755. |
| MLA | Li, Baojiu,et al."The non-linear matter and velocity power spectra in f(R) gravity".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 428.1(2013):743-755. |
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