Modelling peculiar velocities of dark matter haloes
文献类型：期刊论文
| 作者 | Hamana, T; Kayo, I; Yoshida, N; Suto, Y; Jing, YP |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2003-08-21 |
| 卷号 | 343期号:4页码:1312-1318 |
| 关键词 | galaxies : clusters : general cosmology : theory dark matter large-scale structure of Universe |
| 英文摘要 | We present a simple model that accurately describes various statistical properties of peculiar velocities of dark matter haloes. We pay particular attention to the following two effects. First, the evolution of the halo peculiar velocity depends on the local matter density, instead of the global density. Secondly, dark matter haloes are biased tracers of the underlying mass distribution, thus haloes tend to be located preferentially at high density regions. For the former, we develop an empirical model calibrated with N -body simulations while, for the latter, we use a conventional halo bias model based on the extended Press-Schechter model combined with an empirical lognormal probability distribution function of the mass density distribution. We find that, compared with linear theory, the present model significantly improves the accuracy of predictions of statistical properties of the halo peculiar velocity field including the velocity dispersion, the probability distribution function, and the pairwise velocity dispersion at large separations. Thus, our model predictions may be useful in analysing future observations of the peculiar velocities of galaxy clusters. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | N-BODY SIMULATIONS ; GALAXY CLUSTERS ; LOGNORMAL MODEL ; BULK FLOWS ; ONE-POINT ; FLUCTUATIONS ; MOTIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000184665600028 |
| 源URL | [http://119.78.226.72/handle/331011/18273]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Inst Astrophys, F-75014 Paris, France 2.Natl Astron Observ Japan, Tokyo 1818588, Japan 3.Univ Tokyo, Dept Phys, Tokyo 1130033, Japan 4.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 5.Univ Tokyo, Sch Sci, Res Ctr Early Universe, Tokyo 1130033, Japan 6.MPI Astrophys, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hamana, T,Kayo, I,Yoshida, N,et al. Modelling peculiar velocities of dark matter haloes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2003,343(4):1312-1318. |
| APA | Hamana, T,Kayo, I,Yoshida, N,Suto, Y,&Jing, YP.(2003).Modelling peculiar velocities of dark matter haloes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,343(4),1312-1318. |
| MLA | Hamana, T,et al."Modelling peculiar velocities of dark matter haloes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 343.4(2003):1312-1318. |
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来源：上海天文台
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