Effects of spacetime anisotropy on the galaxy rotation curves

Effects of spacetime anisotropy on the galaxy rotation curves
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时空各向异性对星系旋转曲线的影响

DOI:
10.1140/epjc/s10052-013-2447-1
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发表时间:
2013-05
影响因子:
4.4
通讯作者:
Wang, Sai
Wang, Sai
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chang, Zhe;Li, Ming-Hua;Li, Xin;Lin, Hai-Nan;Wang, Sai

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对星系旋转曲线的观测显示了与牛顿理论的显著差异。这个问题可以用时空各向异性的影响来解释。相反,时空各向异性也可能受到星系旋转曲线的限制。芬斯勒几何本质上是一种各向异性几何。在芬斯勒时空中,我们研究了星系尺度下时空各向异性的影响。研究发现,芬斯勒模型与Milgrom的MOND有密切的关系。通过对星系旋转曲线进行最佳拟合,我们发现当牛顿加速度ngm /r2小于临界加速度a0时,时空的各向异性效应变得显著。有趣的是,临界加速度a0,虽然在不同的星系之间是不同的,但在数量级上。
The observations on galaxy rotation curves show significant discrepancies from the Newtonian theory. This issue could be explained by the effect of the anisotropy of the spacetime. Conversely, the spacetime anisotropy could also be constrained by the galaxy rotation curves. Finsler geometry is a kind of intrinsically anisotropic geometry. In this paper, we study the effect of the spacetime anisotropy at galactic scales in the Finsler spacetime. It is found that the Finslerian model has close relations with the Milgrom’s MOND. By performing the best-fit procedure to the galaxy rotation curves, we find that the anisotropic effects of the spacetime become significant when the Newtonian accelerationGM/r2is smaller than the critical accelerationa0. Interestingly, the critical accelerationa0, although varies between different galaxies, is in the order of magnitude.
DOI: 10.1086/161131
发表时间: 1983-07
期刊: The Astrophysical Journal
影响因子: --
作者:
M. Milgrom
通讯作者: M. Milgrom
DOI: 10.1086/158003
发表时间: 1980-06
期刊: The Astrophysical Journal
影响因子: --
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影响因子: --
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GRAAL 实验对时空各向异性和洛伦兹破坏的约束
DOI: 10.1140/epjc/s10052-013-2337-6
发表时间: 2013-02
影响因子: 4.4
作者:
Chang, Zhe;Wang, Sai
通讯作者: Wang, Sai