Crossing the Phantom divide line in the Chaplygin gas model

Details Crossing the Phantom divide line in the Chaplygin gas model Crossing the Phantom divide line in the Chaplygin gas model

2009-09-05

arxiv.org/abs/0909.1002v2

Phys.Lett.B687:114-118,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, references updated, explanations added. To be published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2010.03.011

The role of the interaction in reaching and crossing the phantom divide line
in the Chaplygin gas model is discussed. We obtain some necessary properties of
the interaction that allow the model to arrive at or cross the phantom divide
line. We show that these properties put some conditions on the ratio of dark
matter to dark energy density in the present epoch.

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