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Testing for w<-1 in the Solar System | | Jerome Martin
; Carlo Schimd
; Jean-Philippe Uzan
; | | Date: |
7 Oct 2005 | | Affiliation: | IAP | | Abstract: | In scalar-tensor theories of gravity, the equation of state of dark energy, w, can become smaller than -1 without violating any energy condition. The value of w today is tied to the level of deviations from general relativity which, in turn, is constrained by solar system and pulsars timing experiments. The conditions on these local constraints for w to be significantly less than -1 are established. It is demonstrated that this requires to consider theories that differ from the Jordan-Fierz-Brans-Dicke theory and that involve either a steep coupling function or a steep potential. It is also shown how a robust measurement of w could probe scalar-tensor theories. | | Source: | arXiv, astro-ph/0510208 | | Services: | Forum | Review | PDF | Favorites | |
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