Coupled quintessence and vacuum decay

Abstract

We discuss observational consequences of a class of cosmological models characterized by the dilution of pressureless matter attenuated with respect to the usual $a^{-3}$ scaling due to the decay of vacuum energy. We carry out a joint statistical analysis of observational data from the new \emph{gold} sample of 182 SNe Ia, recent estimates of the CMB shift parameter, and BAO measurements from the SDSS to show that such models favor the decay of vacuum only into the dark matter sector, and that the separately conserved baryons cannot be neglected. In order to explore ways to more fundamentally motivated models, we also derive a coupled scalar field version for this general class of vacuum decay scenarios.

6 pages, 3 figures, LaTeX

References in corpus (64)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• The Cosmological Constant and Dark Energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• Cosmological Constant - the Weight of the Vacuum
• The Case for a Positive Cosmological Lambda-term
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Coupled Quintessence
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Observational Constraints on the Nature of the Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey
• Interacting Quintessence
• Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
• Evolution of the Scale Factor with a Variable Cosmological Term
• Interacting quintessence solution to the coincidence problem
• Cosmological scaling solutions of non-minimally coupled scalar fields
• Galaxy Cluster Virial Masses and Omega
• Dark Energy: Vacuum Fluctuations, the Effective Phantom Phase, and Holography
• Probing the Coupling between Dark Components of the Universe
• Nonminimal coupling and quintessence
• A theoretician's analysis of the supernova data and the limitations in determining the nature of dark energy
• Cosmological parameters from supernova observations: A critical comparison of three data sets
• The scaling evolution of cosmological constant
• A comparison of cosmological models using recent supernova data
• On the scaling behavior of the cosmological constant and the possible existence of new forces and new light degrees of freedom
• Can vacuum decay in our Universe?
• Observational constraints on interacting quintessence models
• Variable Cosmological Constant as a Planck Scale Effect
• Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications
• Consequences on variable Lambda-models from distant Type Ia supernovae and compact radio sources
• Scaling Cosmology
• Testing dark energy beyond the cosmological constant barrier
• Stationary dark energy with a baryon-dominated era: solving the coincidence problem with a linear coupling
• Decaying Vacuum Energy and Deflationary Cosmology in Open and Closed Universes
• Interpreting Cosmological Vacuum Decay
• Cosmological Constraints from Hubble Parameter versus Redshift Data
• Growth of perturbations in dark matter coupled with quintessence
• A study of the angular size-redshift relation for models in which $\Lambda$ decays as the energy density
• Constraining Dark Energy with X-ray Galaxy Clusters, Supernovae and the Cosmic Microwave Background
• Testing the running of the cosmological constant with Type Ia Supernovae at high z
• Expected constraints on the generalized Chaplygin equation of state from future supernova experiments and gravitational lensing statistics
• Friedmann cosmology with decaying vacuum density
• Dynamical dark energy or variable cosmological parameters?
• Quintessence Model With Double Exponential Potential
• An estimate of Ω_m without priors
• Constraints on the coupled quintessence from cosmic microwave background anisotropy and matter power spectrum
• Constraints on Cardassian Expansion from Distant type Ia Supernovae
• Generalized Chen-Wu type cosmological model
• Study of the Magnitude-Redshift Relation for type Ia Supernovae in a Model resulting from a Ricci-Symmetry
• Dark Energy and Some Alternatives: a Brief Overview
• Constraints on the DGP Model from Recent Supernova Observations and Baryon Acoustic Oscillations
• Decaying Lambda cosmology, varying G and holography
• Supernova constraints on decaying vacuum cosmology
• Decaying $\Lambda$ cosmologies and statistical properties of gravitational lenses
• Phase Space Analysis of Quintessence Cosmologies with a Double Exponential Potential
• The Existence of an Old Quasar at $z=3.91$ and its Implications for $\Lambda (t)$ Deflationary Cosmologies
• Scalar field description of decaying-$\Lambda$ cosmologies
• Studying the decay of the vacuum energy with the observed density fluctuation spectrum
• CMB constraints on interacting cosmological models
• Current and future supernova constraints on decaying $\Lambda$ cosmologies
• Cosmic acceleration in brane cosmology
• Complementary Constraints on Brane Cosmology
• Deflationary cosmology: constraints from angular size and ages of globular clusters

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• A parametric model for dark energy
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• Modified Gravity with a Non-minimal Gravitational Coupling to Matter
• Cosmological consequences of a possible $\Lambda$-dark matter interaction
• AIC, BIC, Bayesian evidence against the interacting dark energy model
• From inflation to dark energy through a dynamical Lambda: an attempt at alleviating fundamental cosmic puzzles
• New coupled quintessence cosmology
• On the Chameleon Brans-Dicke Cosmology
• Observational tests for Λ(t)CDM cosmology
• Evolution of density perturbations in decaying vacuum cosmology: The case of non-zero perturbations in the cosmological term
• Cosmology with interaction in the dark sector
• On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies
• Black Hole Formation with an Interacting Vacuum Energy Density
• Cosmic Acceleration in Brans-Dicke Cosmology
• An interacting model for the cosmological dark sector
• Dynamical system approach to running $\Lambda$ cosmological models
• Constraints on dark energy from baryon acoustic peak and galaxy cluster gas mass measurements
• Number Counts and Dynamical Vacuum Cosmologies
• Coupled quintessence with a possible transient accelerating phase
• $H(z)$ diagnostics on the nature of dark energy
• A low-$z$ test for interacting dark energy
• Particle Production and Universal Thermodynamics
• Deflation of the cosmological constant associated with inflation and dark energy
• Deflation of Vacuum Energy During Inflation Due to Bulk-Brane Interaction
• ZKDR Distance, Angular Size and Phantom Cosmology
• Emergent gravity and Dark Energy
• A possible analogy between the dynamics of a skydiver and a scalar field: cosmological consequences