TITLE

# Phantom Energy with Variable G and Î›

AUTHOR(S)
Arbab, Arbab I.
PUB. DATE
April 2009
SOURCE
AIP Conference Proceedings;4/17/2009, Vol. 1115 Issue 1, p230
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
We have investigated a cosmological model of a phantom energy with a variable cosmo-logical constant (Î›) depending on the energy density (Ï) as Î›âˆÏ-Î±, Î± = const. and a variable gravitational constant (G). The model requires Î±<0 and a negative gravitational constant. The cosmological constant evolves with time as, Î›âˆt-2. For Ï‰>-1 and Î±<-1 the cosmological constant, Î›<0, G>0 and Ï decrease with cosmic expansion. For ordinary matter (or dark matter), i.e., Ï‰>-1 we have -1<Î±<0 and Î²>0 so that G>0 increases with time and Ï decreases with time. Cosmic acceleration with dust particles is granted provided -23<Î±<0 and Î›>0.
ACCESSION #
38316290

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