Subhaloes gone Notts: subhaloes as tracers of the dark matter halo shape
文献类型：期刊论文
| 作者 | Hoffmann, Kai1; Planelles, Susana2,3; Gaztanaga, Enrique1; Knebe, Alexander4; Pearce, Frazer R.5; Lux, Hanni5,6; Onions, Julian5; Muldrew, Stuart I.5,7; Elahi, Pascal8,9; Behroozi, Peter10 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2014-08-01 |
| 卷号 | 442期号:2页码:1197-1210 |
| 关键词 | methods: numerical galaxies: haloes cosmology: miscellaneous |
| 英文摘要 | We study the shapes of subhalo distributions from four dark-matter-only simulations of Milky Way-type haloes. Comparing the shapes derived from the subhalo distributions at high resolution to those of the underlying dark matter fields, we find the former to be more triaxial if the analysis is restricted to massive subhaloes. For three of the four analysed haloes, the increased triaxiality of the distributions of massive subhaloes can be explained by a systematic effect caused by the low number of objects. Subhaloes of the fourth halo show indications for anisotropic accretion via their strong triaxial distribution and orbit alignment with respect to the dark matter field. These results are independent of the employed subhalo finder. Comparing the shape of the observed Milky Way satellite distribution to those of high-resolution subhalo samples from simulations, we find agreement for samples of bright satellites, but significant deviations if faint satellites are included in the analysis. These deviations might result from observational incompleteness. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MILKY-WAY SATELLITES ; COSMOLOGICAL SIMULATIONS ; ANISOTROPIC DISTRIBUTION ; SPATIAL-DISTRIBUTION ; GALACTIC SATELLITES ; ANGULAR MOMENTA ; BARYONS MATTER ; DWARF GALAXIES ; DISC GALAXIES ; LOCAL GROUP |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339423100022 |
| 源URL | [http://119.78.226.72/handle/331011/18177]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.CSIC, IEEC, ICE, E-08193 Bellaterra, Barcelona, Spain 2.Univ Trieste, Dept Phys, Astron Unit, I-34131 Trieste, Italy 3.Osserv Astron Trieste, INAF, I-34131 Trieste, Italy 4.Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, E-28049 Madrid, Spain 5.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 6.Univ Oxford, Dept Phys, Oxford OX1 3RH, England 7.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England 8.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 9.Univ Sydney, Inst Astron, Sydney, NSW 2006, Australia 10.Space Telescope Sci Inst, Baltimore, MD 21218 USA |
| 推荐引用方式 GB/T 7714 | Hoffmann, Kai,Planelles, Susana,Gaztanaga, Enrique,et al. Subhaloes gone Notts: subhaloes as tracers of the dark matter halo shape[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,442(2):1197-1210. |
| APA | Hoffmann, Kai.,Planelles, Susana.,Gaztanaga, Enrique.,Knebe, Alexander.,Pearce, Frazer R..,...&Sgro, Mario A..(2014).Subhaloes gone Notts: subhaloes as tracers of the dark matter halo shape.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,442(2),1197-1210. |
| MLA | Hoffmann, Kai,et al."Subhaloes gone Notts: subhaloes as tracers of the dark matter halo shape".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 442.2(2014):1197-1210. |
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来源：上海天文台
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