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Following close on the heels of new study shows Dark Matter isn't needed? Relativty explains it? we have Back-Reaction: A Cosmological Panacea which does for Dark Energy what General Relativity Resolves Galactic Rotation Without Exotic Dark Matter tries to do for Dark Matter.
It now seems that both Dark Energy and Dark Matter are artifacts of incomplete application of General Relativity and nothing further is required.
Comments?
Garth
We present a solution to the dark energy problem in terms of the Effective Energy Momentum Tensor (EMT) of cosmological perturbations. The approach makes use of the gravitational back-reaction of long wavelength (super-Hubble) fluctuation modes on the background metric. Our results indicate that, following preheating, the energy density associated with back-reaction is sub-dominant and behaves as a tracker during the radiation era. At the onset of matter domination, however, the effects of back-reaction begin to grow relative to the matter density and the associated equation of state quickly approaches that of a cosmological constant. Using standard values for the preheating temperature and the amplitude of the inflaton following preheating, we show that this mechanism leads to a very natural explanation of dark energy. We comment on other recent attempts to explain the dark energy using back-reaction and their relation to our work.
It now seems that both Dark Energy and Dark Matter are artifacts of incomplete application of General Relativity and nothing further is required.
Comments?
Garth