Modified Newtonian dynamics as an alternative to dark matter
Modified Newtonian dynamics as an alternative to dark matter
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DOI：
10.1146/annurev.astro.40.060401.093923
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发表时间：
2002-04
影响因子：
33.3
通讯作者：
R. Sanders;S. McGaugh
中科院分区：
文献类型：
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作者：
R. Sanders;S. McGaugh
▪ 摘要 修正牛顿动力学(MOND) 是米尔格罗姆建议的对牛顿引力或惯性的一种基于经验的修正，作为宇宙暗物质的替代方案。基本思想是，当加速度低于 ao ≈ 10−8 cm/s2 ≈ cHo/6 时，有效引力接近 ，其中 gn 是通常的牛顿加速度。这个简单的算法产生螺旋星系的平坦旋转曲线和 M ∝ V4 形式的质量-旋转速度关系，该关系构成了观测到的光度-旋转速度关系（塔利-费舍尔定律）的基础。我们回顾了 MOND 在从矮球状星系到超星系团等尺度上取得的现象学成功，并证明暗物质的证据可以与 MOND 的证据同样得到很好的解释。我们讨论基于加速度的牛顿动力学修正的可能物理基础以及 MOND 到宇宙学和结构形成的扩展。
▪ Abstract Modified Newtonian dynamics (MOND) is an empirically motivated modification of Newtonian gravity or inertia suggested by Milgrom as an alternative to cosmic dark matter. The basic idea is that at accelerations below ao ≈ 10−8 cm/s2 ≈ cHo/6 the effective gravitational attraction approaches , where gn is the usual Newtonian acceleration. This simple algorithm yields flat rotation curves for spiral galaxies and a mass-rotation velocity relation of the form M ∝ V4 that forms the basis for the observed luminosity–rotation velocity relation—the Tully-Fisher law. We review the phenomenological success of MOND on scales ranging from dwarf spheroidal galaxies to superclusters and demonstrate that the evidence for dark matter can be equally well interpreted as evidence for MOND. We discuss the possible physical basis for an acceleration-based modification of Newtonian dynamics as well as the extention of MOND to cosmology and structure formation.