Criticality and Big Brake singularities in the tachyonic evolutions of closed Friedmann universes with cold dark matter

Abstract

The evolution of a closed Friedmann universe filled by a tachyon scalar field with a trigonometric potential and cold dark matter (CDM) is investigated. A subset of the evolutions consistent to 1$\sigma$ confidence level with the Union 2.1 supernova data set is identified. The evolutions of the tachyon field are classified. Some of them evolve into a de Sitter attractor, while others proceed through a pseudo-tachyonic regime into a sudden future singularity. Critical evolutions leading to Big Brake singularities in the presence of CDM are found and a new type of cosmological evolution characterized by singularity avoidance in the pseudo-tachyon regime is presented.

arXiv comment7 pages, 5 figures, to be published in Phys. Rev. D

References in corpus (57)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2013 results. XVI. Cosmological parameters
• Dynamics of dark energy
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Cosmological Imprint of an Energy Component with General Equation of State
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• Phantom Energy and Cosmic Doomsday
• A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
• Essentials of k-essence
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Properties of singularities in (phantom) dark energy universe
• Rolling Tachyon
• Accelerated expansion of the universe driven by tachyonic matter
• Reconstructing Dark Energy
• Quintessence: A Review
• The final state and thermodynamics of dark energy universe
• Sudden Future Singularities
• The end of unified dark matter?
• Tachyons, Scalar Fields and Cosmology
• Quantum escape of sudden future singularity
• Critical phenomena in gravitational collapse
• Prospects and Problems of Tachyon Matter Cosmology
• WMAP and the Generalized Chaplygin Gas
• What is needed of a tachyon if it is to be the dark energy?
• More General Sudden Singularities
• Geodesic behavior of sudden future singularities
• Generalized Chaplygin gas as a unified scenario of dark matter/energy: observational constraints
• New Cosmological Singularities in Braneworld Models
• Classification of cosmological milestones
• Kinetic k-essence and Quintessence
• Constraints on Chaplygin quartessence from the CLASS gravitational lens statistics and supernova data
• Barotropic index w-singularities in cosmology
• Stability properties of some perfect fluid cosmological models
• Classical Stability of Sudden and Big Rip Singularities
• Quantum cosmology and late-time singularities
• How far is it to a sudden future singularity of pressure?
• The onset of the non-linear regime in unified dark matter models
• Viscous dissipative Chaplygin gas dominated homogenous and isotropic cosmological models
• Sudden singularities survive massive quantum particle production
• Tachyon cosmology, supernovae data and the Big Brake singularity
• Soft singularity crossing and transformation of matter properties
• Geodesics at Sudden Singularities
• The paradox of soft singularity crossing and its resolution by distributional cosmological quantitities
• Cosmological tests of sudden future singularities
• Constraining the dynamical dark energy parameters: Planck-2013 vs WMAP9
• Will the tachyonic Universe survive the Big Brake?
• The Accelerated Acceleration of the Universe
• Density preturbations in a finite scale factor singularity universe
• Observational constraints on scalar field models of dark energy with barotropic equation of state
• Scalar field cosmological models with finite scale factor singularities
• Rigidity of cosmic acceleration in a class of k-essence cosmologies
• Constraints on the generalized tachyon field models from latest observational data
• Observational constraints on finite scale factor singularities
• Combined cosmological tests of a bivalent tachyonic dark energy scalar field model
• Dark energy and dark matter perturbations in singular universes
• Distributional cosmological quantities solve the paradox of soft singularity crossing