Alternative Dark Energy Models: An Overview

Abstract

A large number of recent observational data strongly suggest that we live in a flat, accelerating Universe composed of $\sim$ 1/3 of matter (baryonic + dark) and $\sim$ 2/3 of an exotic component with large negative pressure, usually named {\bf Dark Energy} or {\bf Quintessence}. The basic set of experiments includes: observations from SNe Ia, CMB anisotropies, large scale structure, X-ray data from galaxy clusters, age estimates of globular clusters and old high redshift galaxies (OHRG's). Such results seem to provide the remaining piece of information connecting the inflationary flatness prediction (${\Omega }_{\mathrm{T}}=1$) with astronomical observations. Theoretically, they have also stimulated the current interest for more general models containing an extra component describing this unknown dark energy, and simultaneously accounting for the present accelerating stage of the Universe. An overlook in the literature shows that at least five dark energy candidates have been proposed in the context of general relativistic models. Since the cosmological constant and rolling scalar field models have already been extensively discussed, in this short review we focus our attention to the three remaining candidates, namely: a decaying vacuum energy density (or $\mathbf{\Lambda }(\mathbf{t})$ {\bf models}), the {\bf X-matter}, and the so-called {\bf Chaplygin-type gas}. A summary of their main results is given and some difficulties underlying the emerging dark energy paradigm are also briefly examined.

11 pages, 4 figures, Invited talk at XXIII Brazilian National Meeting on Particles and Fields, Aguas de Lindoia, Sao Paulo, Brazil. To appear in Brazilian Journal of Physics (2004)

Cited by in corpus (90)

• Dark Energy
• Holographic dark energy and cosmic coincidence
• Cosmological constant and vacuum energy: old and new ideas
• Dark energy and the generalized second law
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Observational constraints on interacting quintessence models
• Cosmological constraints on f(R) gravity theories within the Palatini approach
• Kinematic Constraints to the Transition Redshift from SNe Ia Union Data
• Transition Redshift: New Kinematic Constraints from Supernovae
• Interpreting Cosmological Vacuum Decay
• Expansion History with Decaying Vacuum: A Complete Cosmological Scenario
• Holographic dark energy in Brans-Dicke theory
• Interacting models may be key to solve the cosmic coincidence problem
• Complete Cosmic History with a dynamical Lambda(H) term
• Accelerating Cold Dark Matter Cosmology (${\Omega }_{\Lambda }\equiv 0$)
• CDM Accelerating Cosmology as an Alternative to LCDM model
• Thermodynamics, Spectral Distribution and the Nature of Dark Energy
• An Accelerating Cosmology Without Dark Energy
• Interacting dark energy in $f(R)$ gravity
• Dynamics of Interacting Quintessence Models: Observational Constraints
• New Cosmic Accelerating Scenario without Dark Energy
• Gödel solution in $f(R,T)$ gravity
• Dual interacting cosmologies and late accelerated expansion
• Cosmological model with energy transfer
• Lookback time as a test for brane cosmology
• Eddington-Born-Infeld action for dark energy and dark matter
• An old quasar in a young dark energy-dominated universe?
• Age of High Redshift Objects - a Litmus Test for the Dark Energy Models
• Constraints on the DGP Model from Recent Supernova Observations and Baryon Acoustic Oscillations
• Energy Conditions and Segre Classification of Phantom Fields
• Supernova constraints on decaying vacuum cosmology
• Could the cosmic acceleration be transient? A cosmographic evaluation
• On Phantom Thermodynamics
• Constraints on Cold Dark Matter Accelerating Cosmologies and Cluster Formation
• Cosmic acceleration without dark energy: Background tests and thermodynamic analysis
• Extended Spherical Collapse and the Accelerating Universe
• Studying the decay of the vacuum energy with the observed density fluctuation spectrum
• Bayesian Analysis and Constraints on Kinematic Models from Union SNIa
• From inflation to dark energy through a dynamical Lambda: an attempt at alleviating fundamental cosmic puzzles
• New coupled quintessence cosmology
• Nonsingular Decaying Vacuum Cosmology and Entropy Production
• Scalar field cosmology modified by the Generalized Uncertainty Principle
• A new approach on the stability analysis in ELKO cosmology
• Cartan symmetries and global dynamical systems analysis in a higher-order modified teleparallel theory
• Thermodynamical aspects of running vacuum models
• Effective equation of state for running vacuum: "mirage" quintessence and phantom dark energy
• Chemical Potential and the Nature of the Dark Energy: The case of phantom
• Bianchi Type-I Cosmological Models with Variable G and 4Λ$-Terms in General Relativity
• Reconstructing the interaction rate in holographic models of dark energy
• The Integrated Sachs-Wolfe Effect in Interacting Dark Energy Models
• Bulk Viscous LRS Biachi-I Universe with variable $G$ and decaying $\Lambda$
• Solution of Dirac equation and greybody radiation around a regular Bardeen black hole surrounded by quintessence
• Can Old Galaxies at High Redshifts and Baryon Acoustic Oscillations Constrain H_0?
• Measuring the Chaplygin gas equation of state from angular and luminosity distances
• Clustering, Angular Size and Dark Energy
• Constraining $H_0$ from Sunyaev-Zel'dovich effect, Galaxy Clusters X-ray data, and Baryon Oscillations
• Testing the DGP model with gravitational lensing statistics
• Soft coincidence in late acceleration
• Complementary Constraints on Brane Cosmology
• Some remarks on the attractor behaviour in ELKO cosmology
• On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies
• Is $\Lambda$CDM an effective CCDM cosmology?
• Holographic dark energy and late cosmic acceleration
• New Constraints on the Variable Equation of State Parameter from X-Ray Gas Mass Fractions and SNe Ia
• Constraining the dark energy and smoothness-parameter with supernovae
• Black Hole Formation with an Interacting Vacuum Energy Density
• Constraints on the Cardassian Expansion from the Cosmic Lens All-Sky Survey Gravitational Lens Statistics
• CCDM model from quantum particle creation: constraints on dark matter mass
• Dynamics and Constraints of the Massive Gravitons Dark Matter Flat Cosmologies
• Constraining H0 in General Dark Energy Models from Sunyaev-Zeldovich/X-ray Technique and Complementary Probes
• Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects
• Is Thick Brane Model Consistent with the Recent Observations?
• Horava-Lifshitz gravity and Godel Universe
• Gravitational Matter Creation, Multi-fluid Cosmology and Kinetic Theory
• Inhomogeneous models of interacting dark matter and dark energy
• Phantom Accretion by Black Holes and the Generalized Second Law of Thermodynamics
• Relic gravitational waves and the generalized second law
• Simplified Quartessence Cosmology
• Observational constraints on the braneworld model with brane-bulk energy exchange
• Constraints from the Old Quasar APM 08279+5255 on Two Classes of $\Lambda ($t$)$-Cosmologies
• Phenomenological Dark Energy model with hybrid dynamic Cosmological Constant
• Decaying Vacuum Inflationary Cosmologies: A Complete Scenario Including Curvature Effects
• Can Dark Matter be a Scalar Field?
• The Maxwell--Boltzmann gas with non-standard self--interactions: a novel approach to galactic dark matter
• Analytical considerations about the cosmological constant and dark energy
• Extended Metastable Dark Energy
• Interacting dark sector with quadratic coupling: theoretical and observational viability
• Extended datasamples under the lens of Brane World Theory
• On Gauge Choice of Spherically Symmetric 3-Branes
• Matter-antimatter asymmetry and other cosmological puzzles via running vacuum cosmologies