Comparing dark matter models, modified Newtonian dynamics and modified gravity in accounting for galaxy rotation curves
文献类型：期刊论文
| 作者 | Li, X (reprint author), Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China.; Li, X; Tang, L; Lin, HN; Li, X (reprint author), Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China. |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2017 |
| 卷号 | 41期号:5页码:55101 |
| 关键词 | Galaxies: Kinematics And Dynamics Galaxies: Photometry Galaxies: Spiral |
| DOI | http://dx.doi.org/10.1088/1674-1137/41/5/055101 |
| 英文摘要 | We compare six models (including the baryonic model, two dark matter models, two modified Newtonian dynamics models and one modified gravity model) in accounting for galaxy rotation curves. For the dark matter models, we assume NFW profile and core-modified profile for the dark halo, respectively. For the modified Newtonian dynamics models, we discuss Milgrom's MOND theory with two different interpolation functions, the standard and the simple interpolation functions. For the modified gravity, we focus on Moffat's MSTG theory. We fit these models to the observed rotation curves of 9 high-surface brightness and 9 low-surface brightness galaxies. We apply the Bayesian Information Criterion and the Akaike Information Criterion to test the goodness-of-fit of each model. It is found that none of the six models can fit all the galaxy rotation curves well. Two galaxies can be best fitted by the baryonic model without involving nonluminous dark matter. MOND can fit the largest number of galaxies, and only one galaxy can be best fitted by the MSTG model. Core-modified model fits about half the LSB galaxies well, but no HSB galaxies, while the NFW model fits only a small fraction of HSB galaxies but no LSB galaxies. This may imply that the oversimplified NFW and core-modified profiles cannot model the postulated dark matter haloes well. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/22063]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Li, X (reprint author), Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China.; Li, X (reprint author), Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, X ,Li, X,Tang, L,et al. Comparing dark matter models, modified Newtonian dynamics and modified gravity in accounting for galaxy rotation curves[J]. CHINESE PHYSICS C,2017,41(5):55101. |
| APA | Li, X ,Li, X,Tang, L,Lin, HN,&Li, X .(2017).Comparing dark matter models, modified Newtonian dynamics and modified gravity in accounting for galaxy rotation curves.CHINESE PHYSICS C,41(5),55101. |
| MLA | Li, X ,et al."Comparing dark matter models, modified Newtonian dynamics and modified gravity in accounting for galaxy rotation curves".CHINESE PHYSICS C 41.5(2017):55101. |
入库方式： OAI收割
来源：理论物理研究所
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