Model for a Universe described by a non-minimally coupled scalar field and interacting dark matter

Abstract

In this work it is investigated the evolution of a Universe where a scalar field, non-minimally coupled to space-time curvature, plays the role of quintessence and drives the Universe to a present accelerated expansion. A non-relativistic dark matter constituent that interacts directly with dark energy is also considered, where the dark matter particle mass is assumed to be proportional to the value of the scalar field. Two models for dark matter pressure are considered: the usual one, pressureless, and another that comes from a thermodynamic theory and relates the pressure with the coupling between the scalar field and the curvature scalar. Although the model has a strong dependence on the initial conditions, it is shown that the mixture consisted of dark components plus baryonic matter and radiation can reproduce the expected red-shift behavior of the deceleration parameter, density parameters and luminosity distance.

11 pages and 6 figures. To appear in GRG

References in corpus (18)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• The Cosmological Constant
• Coupled Quintessence
• Can the dark energy equation-of-state parameter w be less than -1?
• Scaling solutions in general non-minimal coupling theories
• The Cosmic Energy Inventory
• Interacting Dark Matter and Dark Energy
• Cosmological scaling solutions of non-minimally coupled scalar fields
• Scalar-tensor gravity in an accelerating universe
• Quintessence, the Gravitational Constant, and Gravity
• Testing dark energy beyond the cosmological constant barrier
• Scalar--Tensor Theories of Gravity with \PHI Dependent Masses
• Gradient instability for w < -1
• A crucial ingredient of inflation
• On the stability of gravity in the presence of a non-minimally coupled scalar field
• Applications to cosmological models of a complex scalar field coupled to a U(1) vector gauge field

Cited by in corpus (20)

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• Cosmological model with non-minimally coupled fermionic field
• Cosmological model with interactions in the dark sector
• The spherical collapse model in time varying vacuum cosmologies
• Cosmological implications and structure formation from a time varying vacuum
• Constraining non-minimally coupled tachyon fields by Noether symmetry
• Solving the main cosmological puzzles with a generalized time varying vacuum energy
• Could Dark Matter Interactions be an Alternative to Dark Energy ?
• Dark energy interacting with neutrinos and dark matter: a phenomenological theory
• Dark Matter-Dark Energy Interaction and the Shape of Cosmic Voids
• Fermion field as inflaton, dark energy and dark matter
• Bulk viscous cosmological model with interacting dark fluids
• Dark Sector from Interacting Canonical and Non-Canonical Scalar Fields
• Coupled Quintessence scalar field model in light of observational datasets
• Effects of dark matter pressure on the ellipticity of cosmic voids
• Cosmological models with interacting components and mass-varying neutrinos
• Accelerated expansion of the Universe in the Presence of Dark Matter Pressure
• Conformal coupling associated with the Noether symmetry and its connection with the $\Lambda$CDM dynamics