Subhaloes going Notts: the subhalo-finder comparison project
文献类型：期刊论文
| 作者 | Onions, Julian1; Knebe, Alexander2; Pearce, Frazer R.1; Muldrew, Stuart I.1; Lux, Hanni1; Knollmann, Steffen R.2; Ascasibar, Yago2; Behroozi, Peter3,4,5; Elahi, Pascal6; Han, Jiaxin6,7,8 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2012-06-01 |
| 卷号 | 423期号:2页码:1200-1214 |
| 关键词 | methods: numerical galaxies: evolution galaxies: haloes cosmology: theory dark matter |
| 英文摘要 | We present a detailed comparison of the substructure properties of a single Milky Way sized dark matter halo from the Aquarius suite at five different resolutions, as identified by a variety of different (sub)halo finders for simulations of cosmic structure formation. These finders span a wide range of techniques and methodologies to extract and quantify substructures within a larger non-homogeneous background density (e.g. a host halo). This includes real-space-, phase-space-, velocity-space- and time-space-based finders, as well as finders employing a Voronoi tessellation, Friends-of-Friends techniques or refined meshes as the starting point for locating substructure. A common post-processing pipeline was used to uniformly analyse the particle lists provided by each finder. We extract quantitative and comparable measures for the subhaloes, primarily focusing on mass and the peak of the rotation curve for this particular study. We find that all of the finders agree extremely well in the presence and location of substructure and even for properties relating to the inner part of the subhalo (e.g. the maximum value of the rotation curve). For properties that rely on particles near the outer edge of the subhalo the agreement is at around the 20 per cent level. We find that the basic properties (mass and maximum circular velocity) of a subhalo can be reliably recovered if the subhalo contains more than 100 particles although its presence can be reliably inferred for a lower particle number limit of 20. We finally note that the logarithmic slope of the subhalo cumulative number count is remarkably consistent and <1 for all the finders that reached high resolution. If correct, this would indicate that the larger and more massive, respectively, substructures are the most dynamically interesting and that higher levels of the (sub)subhalo hierarchy become progressively less important. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DARK-MATTER HALOES ; GALACTIC HALO ; MILKY-WAY ; SUBSTRUCTURES ; SIMULATIONS ; EVOLUTION ; GALAXIES ; ANNIHILATION ; STREAMS ; MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000305070900015 |
| 源URL | [http://119.78.226.72/handle/331011/18094]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 2.Univ Autonoma Madrid, Dept Fis Teor, Fac Ciencias, E-28049 Madrid, Spain 3.Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA 4.Stanford Univ, Dept Phys, Stanford, CA 94305 USA 5.SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA 6.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 7.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China 8.Univ Durham, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England 9.Max Planck Inst Astrophys, D-85741 Garching, Germany 10.UNC, Inst Astron Teor & Expt CCT Cordoba, CONICET, Cordoba, Argentina |
| 推荐引用方式 GB/T 7714 | Onions, Julian,Knebe, Alexander,Pearce, Frazer R.,et al. Subhaloes going Notts: the subhalo-finder comparison project[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,423(2):1200-1214. |
| APA | Onions, Julian.,Knebe, Alexander.,Pearce, Frazer R..,Muldrew, Stuart I..,Lux, Hanni.,...&Tweed, Dylan.(2012).Subhaloes going Notts: the subhalo-finder comparison project.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,423(2),1200-1214. |
| MLA | Onions, Julian,et al."Subhaloes going Notts: the subhalo-finder comparison project".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 423.2(2012):1200-1214. |
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