Two Component Model of Dark Energy
arXiv:0708.2977 · doi:10.1103/PhysRevD.76.123007
Abstract
We consider the possibility that the dark energy is made up of two or more independent components, each having a different equation of state. We fit the model with supernova and gamma-ray burst (GRB) data from resent observations, and use the Markov Chain Monte Carlo (MCMC) technique to estimate the allowed parameter regions. We also use various model selection criteria to compare the two component model with the LCDM, one component dark energy model with static or variable w(XCDM), and with other multi-component models. We find that the two component models can give reasonably good fit to the current data. For some data sets, and depending somewhat on the model selection criteria, the two component model can give better fit to the data than XCDM with static w and XCDM with variable w parameterized by w = w_0 + w_az/(1+z).
10 pages, 8 figures, 3 tables; Version accepted by PRD
References in corpus (60)
- 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
- Cosmological parameters from SDSS and WMAP
- Cosmological Imprint of an Energy Component with General Equation of State
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
- Cosmology and the Fate of Dilatation Symmetry
- Quintessence, Cosmic Coincidence, and the Cosmological Constant
- The Cosmological Constant
- An alternative to quintessence
- The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
- Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
- A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
- Essentials of k-essence
- New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
- Cosmological Tracking Solutions
- Exponential potentials and cosmological scaling solutions
- Kinetically Driven Quintessence
- Dark Energy Constraints from the Cosmic Age and Supernova
- Quintessence and the Rest of the World
- Information criteria for astrophysical model selection
- Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up
- Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
- Observational Constraints on the Nature of the Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey
- Cosmology with a Primordial Scaling Field
- Unifying phantom inflation with late-time acceleration: scalar phantom-non-phantom transition model and generalized holographic dark energy
- Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
- A Precise Distance Indicator: Type Ia Supernova Multicolor Light Curve Shapes
- Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
- Structure formation with a self-tuning scalar field
- How many cosmological parameters?
- Unified phantom cosmology: inflation, dark energy and dark matter under the same standard
- The Hubble Diagram to Redshift >6 from 69 Gamma-Ray Bursts
- Comparison of the Legacy and Gold SnIa Dataset Constraints on Dark Energy Models
- A Nested Sampling Algorithm for Cosmological Model Selection
- Applications of Bayesian model selection to cosmological parameters
- SALT: a Spectral Adaptive Light curve Template for Type Ia Supernovae
- Model-Independent Multi-Variable Gamma-Ray Burst Luminosity Indicator and Its Possible Cosmological Implications
- A comparison of cosmological models using recent supernova data
- Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
- Constraining and Dark Energy with Gamma-Ray Bursts
- Gamma Ray Bursts: new rulers to measure the Universe
- Measuring the effective complexity of cosmological models
- Gamma Ray Bursts as standard candles to constrain the cosmological parameters
- CMB component separation by parameter estimation
- Tension and Systematics in the Gold06 SnIa Dataset
- Which cosmological model with dark energy -- phantom or LambdaCDM
- Can Gamma-Ray Bursts Be Used to Measure Cosmology? A Further Analysis
- Analyze This! A Cosmological Constraint Package for CMBEASY
- Model selection as a science driver for dark energy surveys
- Information-theoretic model selection applied to supernovae data
- Forecasting the Bayes factor of a future observation
- Efficient Cosmological Parameter Estimation with Hamiltonian Monte Carlo
- Comparison of cosmological models using Bayesian theory
- Cosmological constraints combining H(z), CMB shift and SNIa observational data
- Bayesian Evidence for a Cosmological Constant using new High-Redshift Supernovae Data
- What Can Gamma Ray Bursts Teach Us About Dark Energy?
- Can brane dark energy model be probed observationally by distant supernovae?
Cited by in corpus (23)
- Bayes in the sky: Bayesian inference and model selection in cosmology
- On the Origin of Near-Infrared Extragalactic Background Light Anisotropy
- Features of holographic dark energy under the combined cosmological constraints
- Constraints on Cosmological Models and Reconstructing the Acceleration History of the Universe with Gamma-Ray Burst Distance Indicators
- Cosmological Constraints on Invisible Decay of Dark Matter
- Axion decay and anisotropy of near-IR extragalactic background light
- Couplings between holographic dark energy and dark matter
- Cosmology with Photometric Surveys of Type Ia Supernovae
- A divergence-free parametrization for dynamical dark energy
- Observational constraints on conformal time symmetry, missing matter and double dark energy
- Cosmological Implications of 5-dimensional Brans-Dicke Theory
- Cross-Correlation of Near and Far-Infrared Background Anisotropies as Traced by Spitzer and Herschel
- Multi-fluid cosmology in Einstein gravity: analytical solutions
- Standardizing the Gamma-ray burst as a standard candle and applying to the cosmological probes: constraints on the two-component dark energy model
- Constraining deviations from CDM in the Hubble expansion rate
- Cosmological test of an extended quintessence model
- The consistency test on the cosmic evolution
- Primordial Non-Gaussianity from LAMOST Surveys
- Constraints on Multicomponent Dark Energy from Cosmological Observations
- Cosmological constraints on the big bang quantum cosmology model
- Cosmological Constraints on the Undulant Universe
- Cosmological Constraints on the DGP Model in light of DESI DR2 2025 Data
- Delineating cosmic expansion history with recent supernova data: A Bayesian model-independent approach