6533b870fe1ef96bd12d053d

RESEARCH PRODUCT

Higher-order coupled quintessence

Laura Lopez-honorezOlga MenaGrigoris Panotopoulos

subject

PhysicsAstrofísicaNuclear and High Energy PhysicsParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Field (physics)Dark matterCosmic background radiationFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsBaryonTheoretical physicsCoupling (physics)AttractorDark energyQuintessenceAstrophysics - Cosmology and Nongalactic Astrophysics

description

We study a coupled quintessence model in which the interaction with the dark-matter sector is a function of the quintessence potential. Such a coupling can arise from a field dependent mass term for the dark-matter field. The dynamical analysis of a standard quintessence potential coupled with the interaction explored here shows that the system possesses a late-time accelerated attractor. In light of these results, we perform a fit to the most recent Supernovae Ia, Cosmic Microwave Background, and Baryon Acoustic Oscillation data sets. Constraints arising from weak equivalence principle violation arguments are also discussed.

yearjournalcountryeditionlanguage
2010-09-27
10.1103/physrevd.82.123525http://arxiv.org/abs/1009.5263