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Li, X; Tang, L; Lin, HN; 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.
Comparing dark matter models, modified Newtonian dynamics and modified gravity in accounting for galaxy rotation curves
Source PublicationCHINESE PHYSICS C
Language英语
KeywordGalaxies: Kinematics And Dynamics Galaxies: Photometry Galaxies: Spiral
AbstractWe 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.
2017
Volume41Issue:5Pages:55101
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1088/1674-1137/41/5/055101
Funding OrganizationFundamental Research Funds for the Central Universities [106112016CDJCR301206] ; Fundamental Research Funds for the Central Universities [106112016CDJCR301206] ; Fundamental Research Funds for the Central Universities [106112016CDJCR301206] ; Fundamental Research Funds for the Central Universities [106112016CDJCR301206] ; National Natural Science Fund of China [11305181, 11547305, 11603005] ; National Natural Science Fund of China [11305181, 11547305, 11603005] ; National Natural Science Fund of China [11305181, 11547305, 11603005] ; National Natural Science Fund of China [11305181, 11547305, 11603005] ; Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF181CJ1] ; Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF181CJ1] ; Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF181CJ1] ; Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y5KF181CJ1]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/22063
Collection理论物理所科研产出_SCI论文
Corresponding AuthorLi, 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.
Recommended Citation
GB/T 7714
Li, X,Tang, L,Lin, HN,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,Tang, L,Lin, HN,Li, X ,&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.
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