Tilt and phantom cosmology

Abstract

We show that in tilting perfect fluid cosmological models with an ultra-radiative equation of state, generically the tilt becomes extreme at late times and, as the tilt instability sets in, observers moving with the tilting fluid will experience singular behaviour in which infinite expansion is reached within a finite proper time, similar to that of phantom cosmology (but without the need for exotic forms of matter).

arXiv comment9 pages, v2: more discussion, added references

References in corpus (26)

• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• 4D Gravity on a Brane in 5D Minkowski Space
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• Phantom Energy and Cosmic Doomsday
• Coupled Quintessence
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• Braneworld models of dark energy
• The significance of the largest scale CMB fluctuations in WMAP
• Sudden Future Singularities
• Constructing Phantom Cosmologies from Standard Scalar Field Universes
• Evidence of vorticity and shear at large angular scales in the WMAP data: a violation of cosmological isotropy?
• The dS/CFT Correspondence and the Big Smash
• New Isotropic and Anisotropic Sudden Singularities
• Homogeneous cosmologies with cosmological constant
• Global Properties of Locally Spatially Homogeneous Cosmological Models with Matter
• The asymptotic regimes of tilted Bianchi II cosmologies
• A dynamical systems approach to the tilted Bianchi models of solvable type
• Asymptotic isotropization in inhomogeneous cosmology
• Future Asymptotic Behaviour of Tilted Bianchi models of type IV and VIIh
• The Weyl tensor in Spatially Homogeneous Cosmological Models
• The Future of Tilted Bianchi Universes
• Bianchi Cosmologies: A Tale of Two Tilted fluids
• The Futures of Bianchi type VII0 cosmologies with vorticity
• Fluid observers and tilting cosmology
• The Asymptotic Behaviour of Tilted Bianchi type VI${}_0$ Universes
• The late-time behaviour of vortic Bianchi type VIII Universes

Cited by in corpus (9)

• Two-Field Quintom Models in the w-w' Plane
• Dark Fluid: a complex scalar field to unify dark energy and dark matter
• Observational constraints on phantom-like braneworld cosmologies
• Pre-Inflationary Spacetime in String Cosmology
• Late-time behaviour of the tilted Bianchi type VIh models
• Kinematic and Weyl singularities
• Late-time behaviour of the tilted Bianchi type VI${}_{-1/9}$ models
• Properties of kinematic singularities
• Mixmaster Fluids Near the Big Bang