Noether symmetry for Gauss-Bonnet dilatonic gravity

Autor:	Sanyal, Abhik Kumar, Rubano, Claudio, Piedipalumbo, Ester
Rok vydání:	2011
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1007/s10714-011-1207-5
Popis:	Noether symmetry for Gauss-Bonnet-Dilatonic interaction exists for a constant dilatonic scalar potential and a linear functional dependence of the coupling parameter on the scalar field. The symmetry with the same form of the potential and coupling parameter exists all in the vacuum, radiation and matter dominated era. The late time acceleration is driven by the effective cos- mological constant rather than the Gauss-Bonnet term, while the later compensates for the large value of the effective cosmological constant giving a plausible answer to the well-known coincidence problem. Comment: 17 pages, 5 figures, in press on GRG
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1107.0560 Zobrazit plný text záznamu View this record from Arxiv