Dark Energy and Fate of the Universe

Abstract

We explore the ultimate fate of the Universe by using a divergence-free parametrization for dark energy $w(z)=w_0+w_a(\frac{\ln (2+z)}{1+z}-\ln 2)$. Unlike the CPL parametrization, this parametrization has well behaved, bounded behavior for both high redshifts and negative redshifts, and thus can genuinely cover many theoretical dark energy models. After constraining the parameter space of this parametrization by using the current cosmological observations, we find that, at the 95.4% confidence level, our Universe can still exist at least 16.7 Gyr before it ends in a big rip. Moreover, for the phantom energy dominated Universe, we find that a gravitationally bound system will be destroyed at a time $t\simeq P\sqrt{2|1+3w(-1)|}/[6\pi |1+w(-1)|]$, where $P$ is the period of a circular orbit around this system, before the big rip.

5 pages, 3 figures; typos corrected, publication version, Sci China-Phys Mech Astron, doi: 10.1007/s11433-012-4748-z

References in corpus (7)

• Dynamics of dark energy
• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
• Probing the dynamics of dark energy with novel parametrizations
• Probing the dynamics of dark energy with divergence-free parametrizations: A global fit study

Cited by in corpus (29)

• Holographic Dark Energy
• Cosmographic Constraints and Cosmic Fluids
• Growth of matter perturbations in non-minimal teleparallel dark energy
• Cosmological Applications of Pade Approximant
• Comparison of dark energy models after Planck 2015
• Probing kinematics and fate of the Universe with linearly time-varying deceleration parameter
• Cosmological observational constraints on the power law $f(Q)$ type modified gravity theory
• Holographic dark energy in a universe with spatial curvature and massive neutrinos: a full Markov Chain Monte Carlo exploration
• Effects of time-varying $\beta$ in SNLS3 on constraining interacting dark energy models
• Impacts of gravitational-wave standard siren observations from Einstein Telescope and Cosmic Explorer on weighing neutrinos in interacting dark energy models
• Constraining dynamical dark energy with a divergence-free parametrization in the presence of spatial curvature and massive neutrinos
• The Dark Side of the Universe after Planck
• Revisiting the holographic dark energy in a non-flat universe: alternative model and cosmological parameter constraints
• Revisit of constraints on holographic dark energy: SNLS3 dataset with the effects of time-varying $\beta$ and different light-curve fitters
• A global fit study on the new agegraphic dark energy model
• Exploring the evolution of color-luminosity parameter $\beta$ and its effects on parameter estimation
• Strong gravitational lensing constraints on holographic dark energy
• Comparing holographic dark energy models with statefinder
• Diagnosing $\Lambda$HDE model with statefinder hierarchy and fractional growth parameter
• Exploring the cosmological consequences of JLA supernova data with improved flux-averaging technique
• Comparing dark energy models with current observational data
• Effects of a time-varying color-luminosity parameter $\beta$ on the cosmological constraints of modified gravity models
• Cosmological implications of different baryon acoustic oscillation data
• Quintessence and phantom emerging from the split-complex field and the split-quaternion field
• Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions
• A closer look at the cosmological implications of the $\Lambda$HDE model
• Torsion and Problems of Standard Cosmology
• Exploring the Latest Pantheon SNIa Dataset by Using Three Kinds of Statistics Techniques
• A preliminary study about gravitational wave radiation and cosmic heat death