Dark energy models with variable equation of state parameter

Abstract

The dark energy models with variable equation of state parameter $\omega$ is investigated by using law of variation of Hubble's parameter that yields the constant value of deceleration parameter. The equation of state parameter $\omega$ is found to be time dependent and its existing range for this model is consistent with the recent observations of SN Ia data, SN Ia data (with CMBR anisotropy) and galaxy clustering statistics. The physical significance of the dark energy models has also been discussed.

8 pages, 6 figures

References in corpus (35)

• 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
• The Cosmological Constant and Dark Energy
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Cosmological parameters from SDSS and WMAP
• Cosmological Imprint of an Energy Component with General Equation of State
• The Case for a Positive Cosmological Lambda-term
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• The 3D power spectrum of galaxies from the SDSS
• Cosmological Tracking Solutions
• New Constraints on ${\Omega }_M$, ${\Omega }_{\Lambda }$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
• Can the dark energy equation-of-state parameter w be less than -1?
• Reconstructing Dark Energy
• CDM Models with a Smooth Component
• A classification of scalar field potentials with cosmological scaling solutions
• Probing the dark energy: methods and strategies
• Future Supernovae observations as a probe of dark energy
• Dark Energy and Gravity
• LBDS 53W091: An Old red Galaxy at z=1.552
• Bianchi type III models with anisotropic dark energy
• A study of the angular size-redshift relation for models in which $\Lambda$ decays as the energy density
• The Dark Universe
• Prospects for Determining the Equation of State of the Dark Energy: What can be Learned from Multiple Observables?
• Cosmic Acceleration, Dark Energy and Fundamental Physics
• The dark energy equation of state
• Cosmology with decaying tachyon matter
• Evolution of dark-matter haloes in a variety of dark-energy cosmologies
• The value of the equation of state of dark energy
• $\Lambda$-CDM Universe: A Phenomenological Approach With Many Possibilities
• Classicality of primordial fluctuations and Primordial Black Holes
• Generation of Bianchi type V cosmological models with varying $\Lambda$-term

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• The Dark Energy Star and Stability analysis
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• Accelerating dark energy models with anisotropic fluid in Bianchi type-$V{I}_0$ space-time
• Power-law solution for homogeneous and isotropic universe in $f(R,T)$ gravity
• A transitioning universe with anisotropic dark energy
• Asymptotically flat wormhole solutions with variable equation-of-state parameter
• Some FRW Models of Accelerating Universe with Dark Energy
• Cosmological constant dominated transit universe from early deceleration to current acceleration phase in Bianchi-V space-time
• Accelerating Dark Energy Cosmological Model in Two Fluid with Hybrid Scale Factor
• Constraining Bianchi type V universe with recent H(z) and BAO observations in Brans-Dicke theory of gravitation
• Bianchi type II models in the presence of perfect fluid and anisotropic dark energy
• Dark energy stars: Stable configurations
• Anisotropic cosmological models with two fluids
• $\Lambda$CDM-type cosmological model and observational constraints
• Axially magnetized Dark Energy cosmological model
• An anisotropic Kantowski-Sachs universe with radiation, dust and a phantom fluid
• Anisotropy effects on Baryogenesis in $f(R)$-Theories of Gravity
• $\Lambda$-CDM type Heckmann - Suchuking model and union 2.1 compilation
• Cosmology In Terms Of The Deceleration Parameter. Part II
• Some anisotropic universes in the presence of imperfect fluid coupling with spatial curvature
• Modified gravity in a viscous and non-isotropic background
• Time Evolution of the Matter Content of the Expanding Universe in the Framework of Brans-Dicke Gravity
• Lyra's cosmology of homogeneous and isotropic universe in Brans-Dicke theory