Lopsidedness of Self-consistent Galaxies Caused by the External Field Effect of

doi:10.3847/1538-4357/aa7b8a

	Lopsidedness of Self-consistent Galaxies Caused by the External Field Effect of
	Zhao, HongSheng 2,3; Wu, Xufen 1,2,7; Wang, Yougang3 ; Feix, Martin 4,5,6
刊名	ASTROPHYSICAL JOURNAL
	2017-08-01
卷号	844 期号:2
关键词	Galaxies: Kinematics And Dynamics Galaxies: Elliptical And Lenticular Gravitation Cd Methods:Numerical
DOI	10.3847/1538-4357/aa7b8a
文献子类	Article
英文摘要	Adopting Schwarzschild's orbit-superposition technique, we construct a series of self-consistent galaxy models, embedded in the external field of galaxy clusters in the framework of Milgrom's MOdified Newtonian Dynamics (MOND). These models represent relatively massive ellipticals with a Hernquist radial profile at various distances from the cluster center. Using N-body simulations, we perform a first analysis of these models and their evolution. We find that self-gravitating axisymmetric density models, even under a weak external field, lose their symmetry by instability and generally evolve to triaxial configurations. A kinematic analysis suggests that the instability originates from both box and nonclassified orbits with low angular momentum. We also consider a self-consistent isolated system that is then placed in a strong external field and allowed to evolve freely. This model, just like the corresponding equilibrium model in the same external field, eventually settles to a triaxial equilibrium as well, but has a higher velocity radial anisotropy and is rounder. The presence of an external field in the MOND universe generically predicts some lopsidedness of galaxy shapes.
WOS关键词	MODIFIED NEWTONIAN DYNAMICS ; RADIAL-ORBIT INSTABILITY ; DWARF ELLIPTIC GALAXIES ; N-BODY SIMULATIONS ; DARK-MATTER HALOS ; OFF-CENTER NUCLEI ; STELLAR-SYSTEMS ; TRIAXIAL GALAXIES ; MILKY-WAY ; SPIRAL GALAXIES
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000406652900008
资助机构	NSFC(11503025 ; NSFC(11503025 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; European Community-Research Infrastructure Action under the FP8 "Structuring the European Research Area" program(211437) ; European Community-Research Infrastructure Action under the FP8 "Structuring the European Research Area" program(211437) ; Hundred Talents Project of Anhui Province ; Hundred Talents Project of Anhui Province ; Scottish Universities Physics Alliance (SUPA) ; Scottish Universities Physics Alliance (SUPA) ; 973 Program(2014CB845703) ; 973 Program(2014CB845703) ; I-CORE Program of the Planning and Budgeting Committee ; I-CORE Program of the Planning and Budgeting Committee ; Israel Science Foundation(1829/12 ; Israel Science Foundation(1829/12 ; Asher Space Research Institute ; Asher Space Research Institute ; Minerva Foundation ; Minerva Foundation ; 11421303 ; 11421303 ; 203/09) ; 203/09) ; 11390372 ; 11390372 ; 1163004) ; 1163004) ; NSFC(11503025 ; NSFC(11503025 ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; European Community-Research Infrastructure Action under the FP8 "Structuring the European Research Area" program(211437) ; European Community-Research Infrastructure Action under the FP8 "Structuring the European Research Area" program(211437) ; Hundred Talents Project of Anhui Province ; Hundred Talents Project of Anhui Province ; Scottish Universities Physics Alliance (SUPA) ; Scottish Universities Physics Alliance (SUPA) ; 973 Program(2014CB845703) ; 973 Program(2014CB845703) ; I-CORE Program of the Planning and Budgeting Committee ; I-CORE Program of the Planning and Budgeting Committee ; Israel Science Foundation(1829/12 ; Israel Science Foundation(1829/12 ; Asher Space Research Institute ; Asher Space Research Institute ; Minerva Foundation ; Minerva Foundation ; 11421303 ; 11421303 ; 203/09) ; 203/09) ; 11390372 ; 11390372 ; 1163004) ; 1163004)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20078]
专题	国家天文台_光学天文研究部
作者单位	1.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China 2.Univ St Andrews, Sch Phys & Astron, North Haugh KY16 9SS, Fife, Scotland 3.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100012, Peoples R China 4.CNRS, UMR 7095, 98 Bis Blvd Arago, F-75014 Paris, France 5.UPMC, Inst Astrophys Paris, 98 Bis Blvd Arago, F-75014 Paris, France 6.Israel Inst Technol Technion, Dept Phys, IL-32000 Haifa, Israel 7.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhao, HongSheng,Wu, Xufen,Wang, Yougang,et al. Lopsidedness of Self-consistent Galaxies Caused by the External Field Effect of[J]. ASTROPHYSICAL JOURNAL,2017,844(2).
APA	Zhao, HongSheng,Wu, Xufen,Wang, Yougang,&Feix, Martin.(2017).Lopsidedness of Self-consistent Galaxies Caused by the External Field Effect of.ASTROPHYSICAL JOURNAL,844(2).
MLA	Zhao, HongSheng,et al."Lopsidedness of Self-consistent Galaxies Caused by the External Field Effect of".ASTROPHYSICAL JOURNAL 844.2(2017).