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Structure finding in cosmological simulations: the state of affairs
文献类型：期刊论文
| 作者 | Knebe, Alexander1; Pearce, Frazer R.2; Lux, Hanni2,3; Ascasibar, Yago1; Behroozi, Peter4,5,6; Casado, Javier1; Moran, Christine Corbett7; Diemand, Juerg7; Dolag, Klaus8,9; Dominguez-Tenreiro, Rosa1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2013-10-01 |
| 卷号 | 435期号:2页码:1618-1658 |
| 关键词 | galaxies: evolution galaxies: haloes galaxies: luminosity function mass function galaxies: statistics cosmology: theory dark matter |
| 英文摘要 | The ever increasing size and complexity of data coming from simulations of cosmic structure formation demand equally sophisticated tools for their analysis. During the past decade, the art of object finding in these simulations has hence developed into an important discipline itself. A multitude of codes based upon a huge variety of methods and techniques have been spawned yet the question remained as to whether or not they will provide the same (physical) information about the structures of interest. Here we summarize and extent previous work of the 'halo finder comparison project': we investigate in detail the (possible) origin of any deviations across finders. To this extent, we decipher and discuss differences in halo-finding methods, clearly separating them from the disparity in definitions of halo properties. We observe that different codes not only find different numbers of objects leading to a scatter of up to 20 per cent in the halo mass and V-max function, but also that the particulars of those objects that are identified by all finders differ. The strength of the variation, however, depends on the property studied, e.g. the scatter in position, bulk velocity, mass and the peak value of the rotation curve is practically below a few per cent, whereas derived quantities such as spin and shape show larger deviations. Our study indicates that the prime contribution to differences in halo properties across codes stems from the distinct particle collection methods and - to a minor extent - the particular aspects of how the procedure for removing unbound particles is implemented. We close with a discussion of the relevance and implications of the scatter across different codes for other fields such as semi-analytical galaxy formation models, gravitational lensing and observables in general. |
| 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 ; N-BODY SIMULATIONS ; LAMBDA-CDM COSMOLOGY ; MILKY-WAY SATELLITES ; GAUSSIAN INITIAL CONDITIONS ; PRIMORDIAL NON-GAUSSIANITY ; FINDER COMPARISON PROJECT ; DIGITAL SKY SURVEY ; ADAPTIVE MESH REFINEMENT ; SAGITTARIUS DWARF GALAXY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325264600053 |
| 源URL | [http://119.78.226.72/handle/331011/18010]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, E-28049 Madrid, Spain 2.Univ Nottingham, Sch Phys Astron, Nottingham NG7 2RD, England 3.Univ Oxford, Dept Phys, Oxford OX1 3RH, England 4.Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA 5.Stanford Univ, Dept Phys, Stanford, CA 94305 USA 6.SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA 7.Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland 8.Max Planck Inst Astrophys, D-85741 Garching, Germany 9.Univ Observ Munchen, D-81679 Munich, Germany 10.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Knebe, Alexander,Pearce, Frazer R.,Lux, Hanni,et al. Structure finding in cosmological simulations: the state of affairs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,435(2):1618-1658. |
| APA | Knebe, Alexander.,Pearce, Frazer R..,Lux, Hanni.,Ascasibar, Yago.,Behroozi, Peter.,...&Zemp, Marcel.(2013).Structure finding in cosmological simulations: the state of affairs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,435(2),1618-1658. |
| MLA | Knebe, Alexander,et al."Structure finding in cosmological simulations: the state of affairs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 435.2(2013):1618-1658. |
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