Exploring Vainshtein mechanism on adaptively refined meshes
文献类型：期刊论文
| 作者 | Li, Baojiu1; Zhao, Gong-Bo2,3 ; Koyama, Kazuya2
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2013-05-01 |
| 期号 | 5 |
| 关键词 | modified gravity power spectrum cosmological simulations particle physics - cosmology connection |
| 英文摘要 | There has been a lot of research interest in modified gravity theories which utilise the Vainshtein mechanism to recover standard general relativity in regions with high matter density, such as the Dvali-Gabadadze-Porrati and Galileon models. The strong nonlinearity in the field equations of these theories implies that accurate theoretical predictions could only be made using high-resolution cosmological simulations. Previously, such simulations were usually done on regular meshes, which limits both their performance and the accuracy. In this paper, we report the development of a new algorithm and code, based on ECOSMOG that uses adaptive mesh refinements to improve the efficiency and precision in simulating the models with Vainshtein mechanism. We have made various code tests against the numerical reliability, and found consistency with previous simulations. We also studied the velocity field in the self-accelerating branch of the DGP model. The code, parallelised using PPI, is suitable for large cosmological simulations of Galileon-type modified gravity theories. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000320161400025 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5896]  |
| 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 Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Baojiu,Zhao, Gong-Bo,Koyama, Kazuya. Exploring Vainshtein mechanism on adaptively refined meshes[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013(5). |
| APA | Li, Baojiu,Zhao, Gong-Bo,&Koyama, Kazuya.(2013).Exploring Vainshtein mechanism on adaptively refined meshes.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5). |
| MLA | Li, Baojiu,et al."Exploring Vainshtein mechanism on adaptively refined meshes".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2013). |
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来源：国家天文台
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