Unifying all mass discrepancies with one effective gravity law
Unifying all mass discrepancies with one effective gravity law
复制标题
用一个有效的重力定律统一所有质量差异
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
B. Famaey
中科院分区：
文献类型：
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作者：
HongSheng Zhao;B. Famaey
在各种大小的星系中，由重子产生的牛顿引力与实际引力之间存在着非常紧密的关系。这可以解释为取决于加速度的单一有效力定律的效果。然而，在具有更深的势威尔斯的较大系统中，例如星系团，情况并非如此。在这里，我们探讨的可能性，一个有效的力法再现质量差异时，在所有河外星系的加速度和深度的潜力。我们展示，至少在现象学水平上，在经典引力势理论中的一个这样的可能的结构。有趣的是，这个被称为EMOND的框架能够再现星系和星系团中观测到的质量差异，并产生多中心系统，其重力峰值与重子分布峰值之间存在偏移。
A remarkably tight relation is observed between the Newtonian gravity sourced by the baryons and the actual gravity in galaxies of all sizes. This can be interpreted as the effect of a single effective force law depending on acceleration. This is however not the case in larger systems with much deeper potential wells, such as galaxy clusters. Here we explore the possibility of an effective force law reproducing mass discrepancies in all extragalactic systems when depending on both acceleration and the depth of the potential well. We exhibit, at least at a phenomenological level, one such possible construction in the classical gravitational potential theory. Interestingly, the framework, dubbed EMOND, is able to reproduce the observed mass discrepancies in both galaxies and galaxy clusters, and to produce multi-center systems with offsets between the peaks of gravity and the peaks of the baryonic distribution.