Dark energy as an elastic strain fluid

作者：Radicella N^*; Sereno M; Tartaglia A

来源：Monthly Notices of the Royal Astronomical Society, 2013, 429(2): 1149-1155.

DOI：10.1093/mnras/sts400

• cosmology: theory
• dark energy

The origin of the accelerated expansion of the Universe is still unclear and new physics is needed on cosmological scales. We propose and test a novel interpretation of dark energy as originated by an elastic strain due to a cosmic defect in an otherwise Euclidean space-time. The strain modifies the expansion history of the universe. This new effective contribution tracks radiation at early times and mimics a cosmological constant at late times. The theory is tested against observations, from nucleosynthesis to the cosmic microwave background and formation and evolution of large-scale structure to supernovae. Data are very well reproduced with Lame parameters of the order of 10(-52) m(-2).

• 出版日期2013-2