$w_d=-1$ in interacting quintessence model

Details $w_d=-1$ in interacting quintessence model $w_d=-1$ in interacting quintessence model

2009-04-08

arxiv.org/abs/0904.1349v3

Eur.Phys.J.C66:445-449,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, references updated, some notes added, minor changes applied, accepted for publication in Eur. Phys. J. C

Scientific paper

10.1140/epjc/s10052-010-1266-x

A model consisting of quintessence scalar field interacting with cold dark matter is considered. Conditions required to reach $w_d=-1$ are discussed. It is shown that depending on the potential considered for the quintessence, reaching the phantom divide line puts some constraints on the interaction between dark energy and dark matter. This also may determine the ratio of dark matter to dark energy density at $w_d=-1$.

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