Unified Dark Fluid and Cosmic Transit Models in Brans-Dicke Theory
arXiv:2004.01027 · doi:10.1016/j.dark.2020.100722
Abstract
Some dark energy cosmological models are constructed in the framework of a generalised Brans-Dicke theory which contains a self interacting potential and a dynamical coupling parameter. The dark sector of the universe is considered through a unified linear equation of state. The parameters of the unified dark fluid have been constrained from some physical basis. Since the universe is believed to have undergone a transition from an early deceleration to a late time acceleration, the deceleration parameter should have a signature flipping behaviour at the transition redshift. We have used a hybrid scale factor to simulate the dynamical behaviour of the deceleration parameter. Basing upon the observational constraints on the transition redshift, we have constructed four different transitioning dark energy models. The constructed models are confronted with observational data. For all the models, the behaviour of the dynamical scalar field, Brans-Dicke parameter, Self interacting potential are investigated. Also, on the basis of the generalised Brans-Dicke theory, we have estimated the time variation of the Newtonian gravitational constant.
arXiv comment17pages, 12 figures
References in corpus (70)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Planck 2013 results. XVI. Cosmological parameters
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- 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
- f(R) theories
- A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
- Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
- f(R,T) gravity
- The Case for a Positive Cosmological Lambda-term
- Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
- Exploring the Expansion History of the Universe
- Accelerating Universes with Scaling Dark Matter
- The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
- A 2.4% Determination of the Local Value of the Hubble Constant
- New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
- The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
- New Constraints on , , and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
- Modified Gauss-Bonnet theory as gravitational alternative for dark energy
- Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
- Rolling Tachyon
- A 6% measurement of the Hubble parameter at : direct evidence of the epoch of cosmic re-acceleration
- Einstein's Other Gravity and the Acceleration of the Universe
- Planck 2013 results. XXII. Constraints on inflation
- KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
- Constraints on dark energy from Chandra observations of the largest relaxed galaxy clusters
- Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
- Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
- Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
- SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
- Accelerating universe from F(T) gravity
- Hubble parameter measurement constraints on the cosmological deceleration-acceleration transition redshift
- A correlation of the cosmic microwave sky with large scale structure
- The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: RSD measurement from the power spectrum and bispectrum of the DR12 BOSS galaxies
- A kinematical approach to dark energy studies
- An Improved Distance to NGC 4258 and its Implications for the Hubble Constant
- Does the Hubble constant tension call for new physics?
- From cosmic deceleration to acceleration: new constraints from SN Ia and BAO/CMB
- The power spectrum of galaxies in the 2dF 100k redshift survey
- Cosmology with hybrid expansion law: scalar field reconstruction of cosmic history and observational constraints
- Dark energy cosmology with generalized linear equation of state
- The cosmological constant from the ghost. A toy model
- Brans-Dicke gravity with a cosmological constant smoothes out CDM tensions
- Self interacting Brans Dicke cosmology and Quintessence
- Observational signatures of Jordan-Brans-Dicke theories of gravity
- Constraints on kinematic models from the latest observational data
- Observational constraints on variable equation of state parameters of dark matter and dark energy after Planck
- The Constancy of the Constants of Nature: Updates
- DM: Observational constraints on unified dark matter with constant speed of sound
- Anisotropic dark energy model with a hybrid scale factor
- Scalar-Tensor Cosmological Models
- Cosmological constraints on coupled dark energy
- Bianchi-V String Cosmological model with Dark Energy Anisotropy
- Unified dark fluid in Brans-Dicke theory
- Time Dependence of Brans-Dicke Parameter w for an Expanding Universe
- Constraining a possible time-variation of the gravitational constant through "gravitochemical heating" of neutron stars
- Testing Dark energy models in the light of tension
- Model independent constraints on transition redshift
- Role of Brans-Dicke Theory with or without self-interacting potential in cosmic acceleration
- Transition Redshift: New constraints from parametric and nonparametric methods
- Probing the time dependence of dark energy
- Late time Acceleration and Role of Skewness in Anisotropic models
- Two fluid anisotropic dark energy models in a scale invariant theory
- Observational constraints on unified dark matter including Hubble parameter data
- Cosmological Constraints on Ghost Dark Energy in the Brans-Dicke Theory by Using MCMC Approach
- Cosmic Acceleration and Brans-Dicke Theory
- Generalized Brans-Dicke theories in light of evolving dark energy
- Cosmography with the Sunyaev-Zeldovich effect and X-ray data
- Generalized Brans-Dicke inflation with a quartic potential