Structure formation and the origin of dark energy

Details Structure formation and the origin of dark energy Structure formation and the origin of dark energy

2007-09-21

arxiv.org/abs/0709.3490v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figs

Scientific paper

Cosmological constant a.k.a. dark energy problem is considered to be one major challenge in modern cosmology. Here we present a model where large scale structure formation causes spatially-flat FRW universe to fragment into numerous `FRW islands' surrounded by vacuum. We show that this mechanism can explain the origin of dark energy as well as the late time cosmic acceleration. This explanation of dark energy does not require any exotic matter source nor an extremely fine-tuned cosmological constant. This explanation is given within classical general relativity and relies on the fact that our universe has been undergoing structure formation since its recent past.

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