Recent Progress on Testing General Relativity at Cosmological Scales and Implications for Cosmic Acceleration

Cosmic acceleration can be caused by a cosmological constant/dark energy component in the universe or a modification to general relativity that takes effect at cosmological scales. An important question is to be able to distinguish between these two possibilities. I will report about some of our work on this topic including the framework developed and the results obtained using some recent available data sets. I will also report on our recent work to explore the robustness and decisiveness of this type of tests.