The Distinguishability of Interacting Dark Energy from Modified Gravity
arXiv:1209.2618 · doi:10.1088/1475-7516/2013/01/010
Abstract
We study the observational viability of coupled quintessence models with their expansion and growth histories matched to modified gravity cosmologies. We find that for a Dvali-Gabadadze-Porrati model which has been fitted to observations, the matched interacting dark energy models are observationally disfavoured. We also study the distinguishability of interacting dark energy models matched to scalar-tensor theory cosmologies and show that it is not always possible to find a physical interacting dark energy model which shares their expansion and growth histories.
8 pages, 5 figures
References in corpus (71)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Dynamics of dark energy
- Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
- Modified Gravity and Cosmology
- The Confrontation between General Relativity and Experiment
- 4D Gravity on a Brane in 5D Minkowski Space
- Extended Theories of Gravity
- Dark Energy and the Accelerating Universe
- Chameleon Cosmology
- The Confrontation between General Relativity and Experiment
- Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
- Reconstruction of a scalar-tensor theory of gravity in an accelerating universe
- Dark Energy
- Cosmic Growth History and Expansion History
- Reconstructing Dark Energy
- The Large Scale Structure of f(R) Gravity
- Reconciling dark energy models with f(R) theories
- Prospects for probing the dark energy via supernova distance measurements
- Report of the Dark Energy Task Force
- Measuring the dark side (with weak lensing)
- A discriminating probe of gravity at cosmological scales
- Constraining f(R) Gravity as a Scalar Tensor Theory
- Confirmation of general relativity on large scales from weak lensing and galaxy velocities
- Distinguishing Modified Gravity from Dark Energy
- How to determine an effective potential for a variable cosmological term
- Observational Tests of Modified Gravity
- Probing Cosmic Acceleration Beyond the Equation of State: Distinguishing between Dark Energy and Modified Gravity Models
- Dark Energy versus Modified Gravity
- Separating Dark Physics from Physical Darkness: Minimalist Modified Gravity vs. Dark Energy
- f(R) actions, cosmic acceleration and local tests of gravity
- Interacting Dark Energy -- constraints and degeneracies
- The acceleration of the universe and the physics behind it
- Constraints on scalar-tensor models of dark energy from observational and local gravity tests
- Bounds on the possible evolution of the Gravitational Constant from Cosmological Type-Ia Supernovae
- On model selection forecasting, Dark Energy and modified gravity
- Two Windows on Acceleration and Gravitation: Dark Energy or New Gravity?
- Inhomogeneous Gravity
- Coupled dark matter-dark energy in light of near Universe observations
- Differentiating dark energy and modified gravity with galaxy redshift surveys
- Determining the Equation of State of the Expanding Universe: Inverse Problem in Cosmology
- Next Generation Redshift Surveys and the Origin of Cosmic Acceleration
- Is Modified Gravity Required by Observations? An Empirical Consistency Test of Dark Energy Models
- Evolving Newton's Constant, Extended Gravity Theories and SnIa Data Analysis
- Observational signatures of Jordan-Brans-Dicke theories of gravity
- Structure formation constraints on the Jordan-Brans-Dicke theory
- Cosmic microwave background with Brans-Dicke gravity II: constraints with the WMAP and SDSS data
- Consistency test of general relativity from large scale structure of the Universe
- WMAP constraints on scalar-tensor cosmology and the variation of the gravitational constant
- Weak lensing, dark matter and dark energy
- Nonlinear growth in modified gravity theories of dark energy
- Theoretical Priors On Modified Growth Parametrisations
- Dark Energy in Practice
- Difficulties Distinguishing Dark Energy from Modified Gravity via Redshift Distortions
- How to Distinguish Dark Energy and Modified Gravity?
- Planck constraints on scalar-tensor cosmology and the variation of the gravitational constant
- A parametrization for the growth index of linear matter perturbations
- A Consistency Relation in Cosmology
- Testing gravity using the growth of large scale structure in the Universe
- Optimizing future imaging survey of galaxies to confront dark energy and modified gravity models
- Will Multiple Probes of Dark Energy find Modified Gravity?
- Discrimination between Lambda-CDM, quintessence, and modified gravity models using wide area surveys
- Unmodified Gravity
- Reconstructing Cosmological Matter Perturbations using Standard Candles and Rulers
- Structure formation in gravity: A distinguishing probe between the dark energy and modified gravity
- Acceleration from Modified Gravity: Lessons from Worked Examples
- Dark Energy: Beyond General Relativity?
- Improved parametrization of the growth index for dark energy and DGP models
- Constraints on scalar-tensor theories of gravity from observations
- Observational Probes of Dark Energy