The optimal gravitational softening length for cosmological N-body simulations
文献类型：期刊论文
| 作者 | Zhang, Tianchi1,2; Liao, Shihong1; Li, Ming1; Gao, Liang1,2,3 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2019-07-01 |
| 卷号 | 487期号:1页码:1227-1232 |
| ISSN号 | 0035-8711 |
| 关键词 | methods: numerical dark matter |
| DOI | 10.1093/mnras/stz1370 |
| 英文摘要 | Gravitational softening length is one of the key parameters to properly set up a cosmological N-body simulation. In this paper, we perform a large suit of high-resolution N-body simulations to revise the optimal softening scheme proposed by Power et al. (P03). Our finding is that P03 optimal scheme works well but is over conservative. Using smaller softening lengths than that of P03 can achieve higher spatial resolution and numerically convergent results on both circular velocity and density profiles. However using an over small softening length overpredicts matter density at the inner most region of dark matter haloes. We empirically explore a better optimal softening scheme based on P03 form and find that a small modification works well. This work will be useful for setting up cosmological simulations. |
| WOS关键词 | LARGE-SCALE STRUCTURE ; DARK-MATTER ; DISC GALAXIES ; INNER STRUCTURE ; HALOES ; EVOLUTION ; PROJECT |
| 资助项目 | national Key Program for Science and Technology Research Development[2017YFB0203300] ; NSFC[11503032] ; NSFC[11133003] ; NSFC[11425312] ; Newton Advanced Fellowship ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows[2015LH0014] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000474907100095 |
| 资助机构 | national Key Program for Science and Technology Research Development ; national Key Program for Science and Technology Research Development ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; national Key Program for Science and Technology Research Development ; national Key Program for Science and Technology Research Development ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; national Key Program for Science and Technology Research Development ; national Key Program for Science and Technology Research Development ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; national Key Program for Science and Technology Research Development ; national Key Program for Science and Technology Research Development ; NSFC ; NSFC ; Newton Advanced Fellowship ; Newton Advanced Fellowship ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS joint Foundation for Excellent Postdoctoral Fellows |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/26930]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhang, Tianchi |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Univ Durham, South Rd, Durham DH1 3LE, England |
| 推荐引用方式 GB/T 7714 | Zhang, Tianchi,Liao, Shihong,Li, Ming,et al. The optimal gravitational softening length for cosmological N-body simulations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,487(1):1227-1232. |
| APA | Zhang, Tianchi,Liao, Shihong,Li, Ming,&Gao, Liang.(2019).The optimal gravitational softening length for cosmological N-body simulations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,487(1),1227-1232. |
| MLA | Zhang, Tianchi,et al."The optimal gravitational softening length for cosmological N-body simulations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 487.1(2019):1227-1232. |
入库方式： OAI收割
来源：国家天文台
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