Equations of State in the Brans-Dicke cosmology

Abstract

We investigate the Brans-Dicke (BD) theory with the potential as cosmological model to explain the present accelerating universe. In this work, we consider the BD field as a perfect fluid with the energy density and pressure in the Jordan frame. Introducing the power-law potential and the interaction with the cold dark matter, we obtain the phantom divide which is confirmed by the native and effective equation of state. Also we can describe the metric $f(R)$ gravity with an appropriate potential, which shows a future crossing of phantom divide in viable $f(R)$ gravity models when employing the native and effective equations of state.

arXiv comment23 pages, 7 figures

References in corpus (39)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• f(R) Theories Of Gravity
• Cosmological parameters from SDSS and WMAP
• f(R) theories
• Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Disappearing cosmological constant in f(R) gravity
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• Transition of the dark energy equation of state in an interacting holographic dark energy model
• Interacting Quintessence
• Cross-correlation Tomography: Measuring Dark Energy Evolution with Weak Lensing
• Future of the universe in modified gravitational theories: Approaching to the finite-time future singularity
• The case for dynamical dark energy revisited
• Crossing the Phantom Divide: Theoretical Implications and Observational Status
• Consistent modified gravity: dark energy, acceleration and the absence of cosmic doomsday
• Phantom scalar dark energy as modified gravity: understanding the origin of the Big Rip singularity
• The future evolution and finite-time singularities in $F(R)$-gravity unifying the inflation and cosmic acceleration
• Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
• A Singularity Problem with f(R) Dark Energy
• Exponential Gravity
• Equation of state for an interacting holographic dark energy model
• Constraints on scalar-tensor models of dark energy from observational and local gravity tests
• Crossing of the phantom divide in modified gravity
• Cosmological evolution in exponential gravity
• Exploring the Properties of Dark Energy Using Type Ia Supernovae and Other Datasets
• Phantom boundary crossing and anomalous growth index of fluctuations in viable f(R) models of cosmic acceleration
• Constraints on a variable dark energy model with recent observations
• Generic feature of future crossing of phantom divide in viable $f(R)$ gravity models
• Role of the Brans-Dicke scalar in the holographic description of dark energy
• Cosmological constraints on the Hu-Sawicki modified gravity scenario
• Brans-Dicke cosmology with a scalar field potential
• Brans-Dicke Scalar Field as a Unique k-essence
• Holographic interacting dark energy in the braneworld cosmology
• A Comment on "Brans-Dicke Cosmology with a scalar field potential"

Cited by in corpus (16)

• A complete cosmological scenario from $f(R,T^{\phi })$ gravity theory
• Future Oscillations around Phantom Divide in f(R) Gravity
• Generalized Mattig's relation in Brans-Dicke-Rastall gravity
• Cosmic Evolution in Brans-Dicke Chameleon Cosmology
• Constraining An Exact Brans-Dicke gravity theory with Recent Observations
• Non-singular Brans-Dicke cosmology with cosmological constant
• $f(R)$ gravity: scalar perturbations in the late Universe
• Does accelerating universe indicates Brans-Dicke theory
• Spherical collapse model in agegraphic dark energy cosmologies
• Thermodynamics of Evolving Lorentzian Wormholes at Apparent Horizon in $f(R)$ Theory of Gravity
• Yang-Mills Casimir wormholes in $D=2+1$
• Structure formation in dark energy cosmologies described by PADE parameterization
• Nucleation of vacuum bubbles in Brans-Dicke type theory
• Late-time acceleration in the coupled Cubic Galileon models
• Future cosmological evolution in $f(R)$ gravity using two equations of state parameters
• Massive gravitons dark matter scenario revisited