The Vainshtein mechanism in the cosmic web
文献类型：期刊论文
| 作者 | Falck, Bridget1; Koyama, Kazuya1; Zhao, Gong-bo1,2 ; Li, Baojiu3
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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| 出版日期 | 2014-07-01 |
| 期号 | 7 |
| 关键词 | modified gravity cosmological simulations cosmic web |
| 英文摘要 | We investigate the dependence of the Vainshtein screening mechanism on the cosmic web morphology of both dark matter particles and halos as determined by ORIGAMI. Unlike chameleon and symmetron screening, which come into effect in regions of high density, Vainshtein screening instead depends on the dimensionality of the system, and screened bodies can still feel external fields. ORIGAMI is well-suited to this problem because it defines morphologies according to the dimensionality of the collapsing structure and does not depend on a smoothing scale or density threshold parameter. We find that halo particles are screened while filament, wall, and void particles are unscreened, and this is independent of the particle density. However, after separating halos according to their large scale cosmic web environment, we find no difference in the screening properties of halos in filaments versus halos in clusters. We find that the fifth force enhancement of dark matter particles in halos is greatest well outside the virial radius. We confirm the theoretical expectation that even if the internal field is suppressed by the Vainshtein mechanism, the object still feels the fifth force generated by the external fields, by measuring peculiar velocities and velocity dispersions of halos. Finally, we investigate the morphology and gravity model dependence of halo spins, concentrations, and shapes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339802700059 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6477]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Durham, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England |
| 推荐引用方式 GB/T 7714 | Falck, Bridget,Koyama, Kazuya,Zhao, Gong-bo,et al. The Vainshtein mechanism in the cosmic web[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2014(7). |
| APA | Falck, Bridget,Koyama, Kazuya,Zhao, Gong-bo,&Li, Baojiu.(2014).The Vainshtein mechanism in the cosmic web.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(7). |
| MLA | Falck, Bridget,et al."The Vainshtein mechanism in the cosmic web".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .7(2014). |
入库方式： OAI收割
来源：国家天文台
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