Dark matter from dark energy-baryonic matter couplings

Abstract

We present a scenario in which a scalar field dark energy is coupled to the trace of the energy momentum tensor of the baryonic matter fields. In the slow-roll regime, this interaction could give rise to the cosmological features of dark matter. We work out the cosmological background solutions and fit the parameters of the model using the Union 2 supernovae data set. Then, we develop the cosmological perturbations up to linear order, and we find that the perturbed variables have an acceptable behavior, in particular the density contrast of baryonic matter grows similar to that in the $\Lambda$CDM model for a suitable choice of the strength parameter of the coupling.

10 pages, 8 figures, in this version small typos are corrected and it matches the published version in Phys. Rev. D15, January 2011

References in corpus (33)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Cosmological Imprint of an Energy Component with General Equation of State
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Chameleon Fields: Awaiting Surprises for Tests of Gravity in Space
• Chameleon Cosmology
• Exponential potentials and cosmological scaling solutions
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• The String Dilaton and a Least Coupling Principle
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• Scaling solutions in general non-minimal coupling theories
• Detecting Dark Energy in Orbit -- the Cosmological Chameleon
• Interacting Dark Matter and Dark Energy
• Evading Equivalence Principle Violations, Cosmological and other Experimental Constraints in Scalar Field Theories with a Strong Coupling to Matter
• Dynamics of interacting dark energy
• Baryon bias and structure formation in an accelerating universe
• Clues from nearby galaxies to a better theory of cosmic evolution
• Constraining Interactions in Cosmology's Dark Sector
• Growth of perturbations in dark matter coupled with quintessence
• The dark degeneracy: On the number and nature of dark components
• Adiabatic instability in coupled dark energy-dark matter models
• The Structure of Structure Formation Theories
• Dilaton-derived quintessence scenario leading naturally to the late-time acceleration of the Universe
• A Viable Cosmology with a Scalar Field Coupled to the Trace of the Stress-Tensor
• Slow-Roll Suppression of Adiabatic Instabilities in Coupled Scalar Field-Dark Matter Models
• On the Degeneracy Inherent in Observational Determination of the Dark Energy Equation of State
• Constraining the dark fluid
• Cosmology with interaction in the dark sector

Cited by in corpus (20)

• Generalized curvature-matter couplings in modified gravity
• Extended $f(R,L_m)$ gravity with generalized scalar field and kinetic term dependences
• The dark degeneracy and interacting cosmic components
• Revisiting Generalized Chaplygin Gas as a Unified Dark Matter and Dark Energy Model
• Conservation laws in theories with universal gravity/matter coupling
• Irreversible thermodynamic description of interacting dark energy - dark matter cosmological models
• Modified Chaplygin Gas as a Unified Dark Matter and Dark Energy Model and Cosmic Constraints
• Unified Dark Fluid with Constant Adiabatic Sound Speed and Cosmic Constraints
• Extending the generalized Chaplygin gas model by using geometrothermodynamics
• Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data
• Unified Dark Fluid with Constant Adiabatic Sound Speed: Including Entropic Perturbations
• Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements
• Dissecting kinetically coupled quintessence: phenomenology and observational tests
• Distance-duality in theories with a nonminimal coupling to gravity
• Spherical Collapse of a Unified Dark Fluid with Constant Adiabatic Sound Speed
• Unified dark fluid with fast transition: including entropic perturbations
• Single scale factor for the universe from the creation of radiation and matter till the present
• Co-interacting dark matter and conformally coupled light scalars
• Fluids in cosmology
• Fullshape power spectrum for the Symmetron modified gravity model