Orbit properties of massive prolate galaxies in the Illustris simulation

doi:10.1093/mnras/sty3297

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	Orbit properties of massive prolate galaxies in the Illustris simulation
	Wang, Yougang 2; Mao, Shude 2,3,4,5; Li, Hongyu 2,6; Xu, Dandan 1; Chen, Xuelei 2; Springel, Volker 1,7,8
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-03-01
卷号	483 期号:3 页码:3048-3059
关键词	galaxies: evolution galaxies: formation galaxies: kinematics and dynamics galaxies: structure
ISSN号	0035-8711
DOI	10.1093/mnras/sty3297
英文摘要	We explore orbit properties of 35 prolate-triaxial galaxies selected from the Illustris cosmological hydrodynamic simulation. We present a detailed study of their orbit families, and also analyse relations between the relative abundance of the orbit families and the spin parameter, triaxiality, the ratio of the angular momentum, and the baryon fraction. We find that box orbits dominate the orbit structure for most prolate-triaxial galaxies, especially in the central region. The fraction of irregular orbits in the prolate-triaxial galaxies is small, and it increases with galaxy radius. Both the x-tube and z-tube orbits are important in prolate-triaxial galaxies, especially in the outer regions. The fraction of box orbits for prolate-triaxial galaxies (0.7 < T < 1) decreases with the triaxiality of the stars, while the fraction of x-tube orbits increases with the triaxiality for a given axis ratio. The fraction of box orbits increases and the fractions of x-tube and z-tube orbits weakly decrease with increasing baryon fraction. These results help to understand the structure of prolate-triaxial galaxies and provide cross-checks for constructing dynamical models of prolate-triaxial galaxies by using the Schwarzschild or the made-to-measure methods.
资助项目	National Science Foundation of China[11821303] ; National Science Foundation of China[11773034] ; National Science Foundation of China[11390372] ; National Science Foundation of China[11633004] ; National Science Foundation of China[QYZDJ-SSW-SLH017] ; National Science Foundation of China[11333003] ; National Science Foundation of China[11761131004] ; National Key Basic Research and Development Program of China[2018YFA0404501] ; Deutsche Forschungsgemeinschaft DFG[SP 709/5-1]
WOS关键词	MINOR-AXIS ROTATION ; ELLIPTIC GALAXIES ; ATLAS(3D) PROJECT ; TRIAXIAL GALAXIES ; INTRINSIC SHAPE ; SAURON PROJECT ; MODELS ; KINEMATICS ; CLASSIFICATION ; DENSITY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000462280000012
资助机构	National Science Foundation of China ; National Science Foundation of China ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Deutsche Forschungsgemeinschaft DFG ; Deutsche Forschungsgemeinschaft DFG ; National Science Foundation of China ; National Science Foundation of China ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Deutsche Forschungsgemeinschaft DFG ; Deutsche Forschungsgemeinschaft DFG ; National Science Foundation of China ; National Science Foundation of China ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Deutsche Forschungsgemeinschaft DFG ; Deutsche Forschungsgemeinschaft DFG ; National Science Foundation of China ; National Science Foundation of China ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; Deutsche Forschungsgemeinschaft DFG ; Deutsche Forschungsgemeinschaft DFG
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/25702]
专题	中国科学院国家天文台
通讯作者	Wang, Yougang
作者单位	1.Heidelberg Inst Theoret Studies, Schloss Wolfsbrunnenweg 35, D-69118 Heidelberg, Germany 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100012, Peoples R China 3.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 4.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 5.Univ Manchester, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Oxford Rd, Manchester M13 9PL, Lancs, England 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Heidelberg Univ, Zentrum Astron, ARI, Monchhofstr 12-14, D-69120 Heidelberg, Germany 8.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85740 Garching, Germany
推荐引用方式 GB/T 7714	Wang, Yougang,Mao, Shude,Li, Hongyu,et al. Orbit properties of massive prolate galaxies in the Illustris simulation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,483(3):3048-3059.
APA	Wang, Yougang,Mao, Shude,Li, Hongyu,Xu, Dandan,Chen, Xuelei,&Springel, Volker.(2019).Orbit properties of massive prolate galaxies in the Illustris simulation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,483(3),3048-3059.
MLA	Wang, Yougang,et al."Orbit properties of massive prolate galaxies in the Illustris simulation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483.3(2019):3048-3059.