Crossing the Phantom divide line in the Chaplygin gas model

Abstract

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.

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

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• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Super-acceleration in non-minimal derivative coupling model
• Cosmic accelerated expansion and the entropy corrected holographic dark energy
• New mechanism to cross the phantom divide
• Constraining H0 in General Dark Energy Models from Sunyaev-Zeldovich/X-ray Technique and Complementary Probes
• Observational constraints on Chaplygin cosmology in a braneworld scenario with induced gravity and curvature effect
• Modified holographic Ricci dark energy coupled to interacting relativistic and non-relativistic dark matter in the nonflat universe
• Power Law Entropy Corrected New-Agegraphic Dark Energy in Hořava-Lifshitz Cosmology
• Phantom Divide Crossing with General Non-minimal Kinetic Coupling