Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-08-05
Phys.Rev.D76:083501,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
19 pages, 1 figure, to appear on Phys. Rev. D
Scientific paper
10.1103/PhysRevD.76.083501
Recently proposed theories based on the cosmic presence of a vectorial field are compared and contrasted. In particular the so called Einstein aether theory is discussed in parallel with a recent proposal of a strained space-time theory (Cosmic Defect theory). We show that the latter fits reasonably well the cosmic observed data with only one, or at most two, adjustable parameters, whilst other vector theories use much more. The Newtonian limits are also compared. Finally we show that the CD theory may be considered as a special case of the aether theories, corresponding to a more compact and consistent paradigm.
Radicella Ninfa
Tartaglia Angelo
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