N-body simulations for testing the stability of triaxial galaxies in MOND
文献类型：期刊论文
| 作者 | Wu, Xufen1; Zhao, HongSheng1,2; Wang, Yougang3 ; Llinares, Claudio4; Knebe, Alexander4,5
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2009-06-11 |
| 卷号 | 396期号:1页码:109-120 |
| 关键词 | methods: N-body simulations galaxies: kinematics and dynamics |
| 英文摘要 | We perform a stability test of triaxial models in Modified Newtonian Dynamics (MOND) using N-body simulations. The triaxial models considered here have densities that vary with r(-1) in the centre and r(-4) at large radii. The total mass of the model varies from 108 to 10(10)M(circle dot), representing the mass scale of dwarfs to medium-mass elliptical galaxies, respectively, from deep MOND to quasi-Newtonian gravity. We build triaxial galaxy models using the Schwarzschild technique, and evolve the systems for 200 Keplerian dynamical times (at the typical length-scale of 1.0 kpc). We find that the systems are virial overheating, and in quasi-equilibrium with the relaxation taking approximately 5 Keplerian dynamical times (1.0 kpc). For all systems, the change of the inertial (kinetic) energy is less than 10 per cent (20 per cent) after relaxation. However, the central profile of the model is flattened during the relaxation and the (overall) axis ratios change by roughly 10 per cent within 200 Keplerian dynamical times (at 1.0 kpc) in our simulations. We further find that the systems are stable once they reach the equilibrium state. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000266610000031 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7575]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ St Andrews, SUPA, Haugh KY16 9SS, Fife, Scotland 2.Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Astrophys Inst Potsdam, D-14482 Potsdam, Germany 5.Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain |
| 推荐引用方式 GB/T 7714 | Wu, Xufen,Zhao, HongSheng,Wang, Yougang,et al. N-body simulations for testing the stability of triaxial galaxies in MOND[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,396(1):109-120. |
| APA | Wu, Xufen,Zhao, HongSheng,Wang, Yougang,Llinares, Claudio,&Knebe, Alexander.(2009).N-body simulations for testing the stability of triaxial galaxies in MOND.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,396(1),109-120. |
| MLA | Wu, Xufen,et al."N-body simulations for testing the stability of triaxial galaxies in MOND".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 396.1(2009):109-120. |
入库方式： OAI收割
来源：国家天文台
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