Exorcising w < -1

Abstract

We show that the combined dimming of Type Ia supernovae induced by both a cosmological constant and the conversion of photons into axions in extra-galactic magnetic fields can impersonate dark energy with an equation of state w < -1. An observer unaware of the presence of photon-axion conversion would interpret the additional dimming as cosmic acceleration faster than that induced by a cosmological constant alone. We find that this mechanism can mimic equations of state as negative as w \simeq - 1.5. Our model does not have any ghosts, phantoms and the like. It is fully consistent with the conventional effective field theory in curved space, and all existing observational constraints on the axions are obeyed.

13 pages, latex file, 4 .eps figures, added references

References in corpus (58)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Cosmological parameters from SDSS and WMAP
• Cosmological Imprint of an Energy Component with General Equation of State
• 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
• Cosmology and the Fate of Dilatation Symmetry
• 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
• Cosmological Results from High-z Supernovae
• Can the dark energy equation-of-state parameter w be less than -1?
• Quintessence and the Rest of the World
• Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up
• Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons
• Ghost Condensation and a Consistent Infrared Modification of Gravity
• Braneworld models of dark energy
• Ghost Inflation
• Cosmology from Maxima-1, Boomerang and COBE/DMR CMB Observations
• Probing the dark energy: methods and strategies
• The State of the Dark Energy Equation of State
• Cosmic Concordance and Quintessence
• The Cosmological Constant is Back
• Super-Acceleration from Massless, Minimally Coupled ${\varphi }^4$
• First Estimations of Cosmological Parameters From BOOMERANG
• Particle Physics from Stars
• Phantom cosmologies
• New dark energy constraints from supernovae, microwave background and galaxy clustering
• Dimming Supernovae without Cosmic Acceleration
• Cosmic distance-duality as probe of exotic physics and acceleration
• A Model-Independent Determination of the Expansion and Acceleration Rates of the Universe as a Function of Redshift and Constraints on Dark Energy
• Probing the dark side: Constraints on the dark energy equation of state from CMB, large scale structure and Type Ia supernovae
• Measuring the Equation-of-state of the Universe: Pitfalls and Prospects
• Is the Dark Matter a Solid?
• The Sloan Digital Sky Survey Quasar Catalog II. First Data Release
• Model-Independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data
• On a Light Spinless Particle Coupled to Photons
• Gamma Rays from SN1987A due to Pseudoscalar Conversion
• SN 1987A Gamma-Ray Limits on the Conversion of Pseudoscalars
• Direct search for solar axions by using strong magnetic field and X-ray detectors
• Current constraints on the dark energy equation of state
• Gradient instability for w < -1
• A Quintessential Axion
• Constraining the quintessence equation of state with SnIa data and CMB peaks
• Domain Walls as Dark Energy
• Super-GZK Photons from Photon-Axion Mixing
• Quintessence Axion Potential Induced by Electroweak Instanton Effects
• Cosmic acceleration vs axion-photon mixing
• Effects of the Intergalactic Plasma on Supernova Dimming via Photon-Axion Oscillations
• Electromagnetic Polarization Effects due to Axion Photon Mixing
• Effects of initial axion production and photon--axion oscillation on type Ia supernova dimming
• Phantom appearance of non-phantom matter
• Quintessence, Cosmology, and Fanaroff-Riley Type IIB Radio Galaxies
• Dimming of Supernovae by Photon-Pseudoscalar Conversion and the Intergalactic Plasma
• Photon-axion oscillations and Type Ia supernovae
• Photon-Axion mixing in an inhomogeneous universe
• Constraining photon-axion oscillations using quasar spectra
• Supernovae as a probe of particle physics and cosmology

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