Institute of Cosmology & Gravitation, University of Portsmouth, United Kingdom.
Phys Rev Lett. 2011 Aug 12;107(7):071303. doi: 10.1103/PhysRevLett.107.071303. Epub 2011 Aug 10.
In this Letter, we investigate the environmental dependence of dark matter halos in theories which attempt to explain the accelerated expansion of the Universe by modifying general relativity (GR). Using high-resolution N-body simulations in f(R) gravity models which recover GR in dense environments by virtue of the chameleon mechanism, we find a significant difference, which depends on the environment, between the lensing and dynamical masses of dark matter halos. This environmental dependence of the halo properties can be used as a smoking gun to test GR observationally.
在这封信件中，我们研究了通过修正广义相对论（GR）来解释宇宙加速膨胀的理论中暗物质晕的环境依赖性。利用高分辨率的 N 体模拟，在 f(R)引力模型中，通过变色龙机制在密集环境中恢复 GR，我们发现暗物质晕的引力和动力学质量之间存在显著的差异，这种差异取决于环境。这种暗物质晕性质的环境依赖性可以作为一种“确凿证据”，用于通过观测来检验 GR。
