Cosmological constraints on a dark matter -- dark energy interaction

Abstract

It is generally assumed that the two dark components of the energy density of the universe, a smooth component called dark energy and a fluid of nonrelativistic weakly interacting particles called dark matter, are independent of each other and interact only through gravity. In this paper, we consider a class of models in which the dark matter and dark energy interact directly. The dark matter particle mass is proportional to the value of a scalar field, and the energy density of this scalar field comprises the dark energy. We study the phenomenology of these models and calculate the luminosity distance as a function of redshift and the CMB anisotropy spectrum for several cases. We find that the phenomenology of these models can differ significantly from the standard case, and current observations can already rule out the simplest models.

28 pages, 6 figures; references added, minor corrections

References in corpus (30)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• The Cosmological Constant and Dark Energy
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• The Cosmological Constant
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Essentials of k-essence
• Coupled Quintessence
• Cosmological Results from High-z Supernovae
• Can the dark energy equation-of-state parameter w be less than -1?
• DASI First Results: A Measurement of the Cosmic Microwave Background Angular Power Spectrum
• Interacting Quintessence
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• Interacting quintessence solution to the coincidence problem
• Interacting Dark Matter and Dark Energy
• The State of the Dark Energy Equation of State
• Tracking and coupled dark energy as seen by WMAP
• Dark Energy and Dark Matter
• Non-perturbative effects of vacuum energy on the recent expansion of the universe
• Acceleration at z>1?
• Scaling Cosmology
• Loop Corrections to Scalar Quintessence Potentials
• Dark Matter and Energy in the Universe
• Determination of Cosmological Parameters
• Perturbation evolution with a non-minimally coupled scalar field
• Dark Matter with Time-Dependent Mass
• Dark Matter and Structure Formation in the Universe
• Dark Group: Dark Energy and Dark Matter
• Dark Matter as Dark Energy
• The Case for LambdaCDM

Cited by in corpus (7)

• Dark Energy from Mass Varying Neutrinos
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Constraints on interacting dark energy models through cosmic chronometers and Gaussian process
• Generating cosmological perturbations with mass variations
• Cosmic Acceleration Data and Bulk-Brane Energy Exchange
• A Thousand Problems in Cosmology: Interaction in the Dark Sector
• Manifestations of String Theory in Astrophysical Data and at the LHC