In Search of New Gravity: testing advanced theories of gravity with cosmological data

在过去的几十年里，宇宙学中最令人震惊的发现是宇宙正在加速膨胀。这个显著的事实表明，我们的引力理论可能需要修正。我们现在的理论，爱因斯坦的广义相对论，在我们的太阳系中站得住脚。如果这个理论在大尺度上崩溃，导致加速膨胀，那么理论改变的地方一定有一些“交叉”尺度。该项目将对那些包含交叉的模型进行理论预测，并根据目前和即将进行的澳大利亚宇宙学调查的现有数据对其进行测试。它将决定我们目前的引力理论是否是一个令人满意的理论，如果不是，哪种新理论应该取代它。

The most startling discovery in cosmology in the last few decades has been that the Universe is accelerating. This remarkable fact indicates that our theory of gravity may need revision. Our current theory, Einstein’s theory of General Relativity, stands up in our solar system. If this theory breaks down on large scales, leading to the accelerating expansion, there must be some ‘cross-over’ scale where the theory changes. This project will make theoretical predictions for those models that contain a cross-over and test them against current data for current and upcoming Australian cosmological surveys. It will determine if our current theory of gravity is a satisfactory theory, and if it is not, which new theory should replace it.