Photometric and kinematic misalignments and their evolution among fast and slow rotators in the illustris simulation
文献类型：期刊论文
| 作者 | Yang, Lisiyuan1,2; Xu, Dandan1,2,3; Mao, Shude1,2,4; Springel, Volker5; Li, Hongyu4,6 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2019-10-01 |
| 卷号 | 489期号:1页码:534-547 |
| ISSN号 | 0035-8711 |
| 关键词 | galaxies: evolution galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: photometry galaxies: stellar content galaxies: structure |
| DOI | 10.1093/mnras/stz2156 |
| 英文摘要 | We use the Illustris simulation to study the distributions of ellipticities and kinematic misalignments of galactic projections, as well as the intrinsic shapes and rotation of the simulated galaxies. Our results for the projections of galaxies display clear trends of an overall increase of kinematic misalignment and a slight decrease of ellipticity for fast rotators with increasingmasses, while revealing no clear distinction between slow rotators of different mass. It is also found that the number of very slow rotators with large ellipticities is much larger than found in observations. The intrinsic properties of the galaxies are then analysed. The results for the intrinsic shapes of the galaxies are mostly consistent with previous results inferred from observational data. The distributions of intrinsic misalignment of the galaxies suggest that some of the galaxies produced by Illustris have significant rotation around their medium axes. Further analysis reveals that most of these galaxies display signs of non-equilibrium. We then study the evolution of the intrinsic misalignments and shapes of three specific Illustris galaxies, which we consider as typical ones, along the main progenitor line of their merger trees, revealing how mergers influence the intrinsic shapes and kinematics: the spin axis in general stays close to the shortest axis, and tends to quickly relax to such an equilibrium state within a few dynamical times of the galaxy after major perturbations; triaxiality and intrinsic flatness in general decrease with time, however, sometimes increases occur that are clearly seen to correlate with major merger events. |
| WOS关键词 | EARLY-TYPE GALAXIES ; STELLAR ANGULAR-MOMENTUM ; TO-LIGHT RATIO ; ATLAS(3D) PROJECT ; INTRINSIC SHAPE ; SAURON PROJECT ; MERGER REMNANTS ; MASSIVE SURVEY ; DARK-MATTER ; RADIUS |
| 资助项目 | Tsinghua University Initiative Scientific Research Program[20181080300] ; DFG[11761131004] ; NSFC[11761131004] ; National Key Basic Research and Development Program of China[2018YFA0404501] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000489292800039 |
| 资助机构 | Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Tsinghua University Initiative Scientific Research Program ; Tsinghua University Initiative Scientific Research Program ; DFG ; DFG ; NSFC ; NSFC ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28030]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Yang, Lisiyuan |
| 作者单位 | 1.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 2.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 3.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 5.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85740 Garching, Germany 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Lisiyuan,Xu, Dandan,Mao, Shude,et al. Photometric and kinematic misalignments and their evolution among fast and slow rotators in the illustris simulation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,489(1):534-547. |
| APA | Yang, Lisiyuan,Xu, Dandan,Mao, Shude,Springel, Volker,&Li, Hongyu.(2019).Photometric and kinematic misalignments and their evolution among fast and slow rotators in the illustris simulation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(1),534-547. |
| MLA | Yang, Lisiyuan,et al."Photometric and kinematic misalignments and their evolution among fast and slow rotators in the illustris simulation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.1(2019):534-547. |
入库方式： OAI收割
来源：国家天文台
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