The build up of the correlation between halo spin and the large-scale structure
文献类型:期刊论文
作者 | Wang, Peng1,2; Kang, Xi1 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2018 |
卷号 | 473期号:2页码:1562-1569 |
ISSN号 | 0035-8711 |
关键词 | methods: numerical methods: statistical Galaxy: halo galaxies: haloes dark matter |
DOI | 10.1093/mnras/stx2466 |
英文摘要 | Both simulations and observations have confirmed that the spin of haloes/galaxies is correlated with the large-scale structure (LSS) with a mass dependence such that the spin of low-mass haloes/galaxies tend to be parallel with the LSS, while that of massive haloes/galaxies tend to be perpendicular with the LSS. It is still unclear how this mass dependence is built up over time. We use N-body simulations to trace the evolution of the halo spin-LSS correlation and find that at early times the spin of all halo progenitors is parallel with the LSS. As time goes on, mass collapsing around massive halo is more isotropic, especially the recent mass accretion along the slowest collapsing direction is significant and it brings the halo spin to be perpendicular with the LSS. Adopting the fractional anisotropy (FA) parameter to describe the degree of anisotropy of the large-scale environment, we find that the spin-LSS correlation is a strong function of the environment such that a higher FA (more anisotropic environment) leads to an aligned signal, and a lower anisotropy leads to a misaligned signal. In general, our results show that the spin-LSS correlation is a combined consequence of mass flow and halo growth within the cosmic web. Our predicted environmental dependence between spin and large-scale structure can be further tested using galaxy surveys. |
WOS关键词 | DARK-MATTER HALOES ; COSMIC WEB ; ANGULAR-MOMENTUM ; GALAXY DISTRIBUTION ; FILAMENTS ; ALIGNMENT ; CLUSTERS ; EVOLUTION ; ORIENTATION ; SWINGS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000423731200010 |
源URL | [http://libir.pmo.ac.cn/handle/332002/22199] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Wang, Peng; Kang, Xi |
作者单位 | 1.Partner Grp MPI Astron, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Grad Sch, 19A Yuquan Rd, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Peng,Kang, Xi. The build up of the correlation between halo spin and the large-scale structure[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,473(2):1562-1569. |
APA | Wang, Peng,&Kang, Xi.(2018).The build up of the correlation between halo spin and the large-scale structure.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,473(2),1562-1569. |
MLA | Wang, Peng,et al."The build up of the correlation between halo spin and the large-scale structure".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 473.2(2018):1562-1569. |
入库方式: OAI收割
来源:紫金山天文台
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。