Perturbations for transient acceleration

Abstract

According to the standard $\Lambda$CDM model, the accelerated expansion of the Universe will go on forever. Motivated by recent observational results, we explore the possibility of a finite phase of acceleration which asymptotically approaches another period of decelerated expansion. Extending an earlier study on a corresponding homogeneous and isotropic dynamics, in which interactions between dark matter and dark energy are crucial, the present paper also investigates the dynamics of the matter perturbations both on the Newtonian and GR levels and quantifies the potential relevance of perturbations of the dark-energy component. In the background, the model is tested against the Supernova type Ia (SNIa) data of the Constitution set and on the perturbative level against growth rate data and the data of the 2dFGRS project. Our results indicate, that a transient phase of accelerated expansion is not excluded by current observations.

arXiv comment31 pages, 10 figures, 2 tables, material and references added

References in corpus (55)

• 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
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic 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
• Cosmological parameters from SDSS and WMAP
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Phantom Energy and Cosmic Doomsday
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• The Second Data Release of the Sloan Digital Sky Survey
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• The Third Data Release of the Sloan Digital Sky Survey
• The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
• The end of unified dark matter?
• A correlation of the cosmic microwave sky with large scale structure
• Phenomenology of a realistic accelerating universe using only Planck-scale physics
• Cosmic Structure Growth and Dark Energy
• The Little Rip
• Le Chatelier-Braun principle in cosmological physics
• Testing LCDM with the Growth Function δ(a): Current Constraints
• Is cosmic acceleration slowing down?
• Separating Dark Physics from Physical Darkness: Minimalist Modified Gravity vs. Dark Energy
• Interacting Dark Energy -- constraints and degeneracies
• The acceleration of the universe and the physics behind it
• New constraints on dark energy from the observed growth of the most X-ray luminous galaxy clusters
• On the growth of linear perturbations
• The Growth of Structure in Interacting Dark Energy Models
• Cross-correlation of the CMB and radio galaxies in real, harmonic and wavelet spaces: detection of the integrated Sachs-Wolfe effect and dark energy constraints
• Joint CMB and Weak Lensing Analysis; Physically Motivated Constraints on Cosmological Parameters
• Observational constraints on the linear fluctuation growth rate
• Growth factor parametrization and modified gravity
• Scalar-field-dominated cosmology with a transient accelerating phase
• Non-Vacuum Initial States for Cosmological Perturbations of Quantum-Mechanical Origin
• Examining the cosmic acceleration with the latest Union2 supernova data
• Fingerprinting dark energy
• A Two-Field Quintessence Model
• Non-adiabatic dark fluid cosmology
• Cosmological structure formation with clustering quintessence
• Neutrino Mass, Dark Energy, and the Linear Growth Factor
• Can the Universe escape eternal acceleration?
• Density Perturbations for Running Cosmological Constant
• Could the cosmic acceleration be transient? A cosmographic evaluation
• Cosmological consequences of a possible $\Lambda$-dark matter interaction
• Observational constraints on a holographic, interacting dark energy model
• Evolution of density perturbations in decaying vacuum cosmology
• Transient cosmic acceleration from interacting fluids
• Growth factor parametrization in curved space
• Constraints on growth index parameters from current and future observations
• Roles of dark energy perturbations in the dynamical dark energy models: Can we ignore them?
• Non-adiabatic perturbations in decaying vacuum cosmology
• Detecting the cosmic acceleration with current data
• Round Table Discussion at the Workshop "New Directions in Modern Cosmology"

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• Viability of general relativity and modified gravity cosmologies using high-redshift cosmic probes
• Observational effects of the early episodically dominating dark energy