Effects of correlation between merging steps on the global halo formation
文献类型：期刊论文
| 作者 | Pan, Jun1 ; Wang, Yougang2; Chen, Xuelei2; Teodoro, Luis F. A.3
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 389期号:1页码:461-468 |
| 关键词 | methods: analytical galaxies: haloes cosmology: theory large scale structure of the Universe |
| 英文摘要 | The excursion set theory of halo formation is modified by adopting the fractional Brownian motion, to account for possible correlation between merging steps. We worked out analytically the conditional mass function, halo merging rate and formation time distribution in the spherical collapse model. We also developed an approximation for the ellipsoidal collapse model and applied it to the calculation of the conditional mass function and the halo formation time distribution. For models in which the steps are positively correlated, the halo merger rate is enhanced when the accreted mass is less than similar to 25M*, while for the negatively correlated case this rate is reduced. Compared with the standard model in which the steps are uncorrelated, the models with positively correlated steps produce more aged population in small mass haloes and more younger population in large mass haloes, while for the models with negatively correlated steps the opposite is true. An examination of simulation results shows that a weakly positive correlation between successive merging steps appears to fit best. We have also found a systematic effect in the measured mass function due to the finite volume of simulations. In future work, this will be included in the halo model to accurately predict the three-point correlation function estimated from simulations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000270677800046 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7355]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland |
| 推荐引用方式 GB/T 7714 | Pan, Jun,Wang, Yougang,Chen, Xuelei,et al. Effects of correlation between merging steps on the global halo formation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,389(1):461-468. |
| APA | Pan, Jun,Wang, Yougang,Chen, Xuelei,&Teodoro, Luis F. A..(2008).Effects of correlation between merging steps on the global halo formation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,389(1),461-468. |
| MLA | Pan, Jun,et al."Effects of correlation between merging steps on the global halo formation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 389.1(2008):461-468. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。