Transient Crossing of Phantom divide line $w_{\Lambda }=-1$ under Gauss-Bonnet interaction

Abstract

Smooth double crossing of the phantom barrier $w_{\Lambda }=-1$ has been found possible in cosmological model with Gauss-Bonnet-scalar interaction, in the presence of background cold dark matter. Such crossing has been observed to be a sufficiently late time phenomena and independent of the sign of Gauss-Bonnet-scalar interaction. The luminosity distance versus redshift curve shows a perfect fit with the $\Lambda CDM$ model up to $z=3.5$.

arXiv comment9 pages, 9 figures

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