Testing for a Super-Acceleration Phase of the Universe

Abstract

We propose a method to probe the phenomenological nature of dark energy which makes no assumptions about the evolution of its energy density. We exemplify this method with a test for a super-acceleration phase of the universe i.e., a phase when the dark energy density grows as the universe expands. We show how such a phase can be detected by combining SNIa (SNAP-like) and CMB (Planck) data without making any assumptions about the evolution of the dark energy equation of state, or about the value of the matter density parameter.

Matches version accepted for publication in PRD. Added discussion of the effect of the calibration parameter on detecting super-acceleration. 8 pages and 4 figures

References in corpus (22)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• Exploring the Expansion History of the Universe
• Phantom Energy and Cosmic Doomsday
• k-Inflation
• Cosmological Results from High-z Supernovae
• Kinetically Driven Quintessence
• Can the dark energy equation-of-state parameter w be less than -1?
• Braneworld models of dark energy
• Constraining dark energy with SNe Ia and large-scale structure
• Future Supernovae observations as a probe of dark energy
• The dS/CFT Correspondence and the Big Smash
• Dimming Supernovae without Cosmic Acceleration
• Measuring the Equation-of-state of the Universe: Pitfalls and Prospects
• Resolving the Cosmological Missing Energy Problem
• Observational Constraints on General Relativistic Energy Conditions, Cosmic Matter Density and Dark Energy from X-Ray Clusters of Galaxies and Type-Ia Supernovae
• How to Test Stringy Dark Energy?
• Measuring the metric: a parametrized post-Friedmanian approach to the cosmic dark energy problem
• Probing Dark Energy with Supernovae: Exploiting Complementarity with the Cosmic Microwave Background
• Testing The Friedmann Equation: The Expansion of the Universe During Big-Bang Nucleosynthesis
• Response of distance measures to the equation of state
• Supernovae with "Super-Hipparcos"

Cited by in corpus (11)

• A Sudden Gravitational Transition
• Exactly Solvable SFT Inspired Phantom Model
• Bouncing and Accelerating Solutions in Nonlocal Stringy Models
• Non-local SFT Tachyon and Cosmology
• Cosmic acceleration and crossing of w=-1 barrier in non-local Cubic Superstring Field Theory model
• On the Null Energy Condition and Cosmology
• Observational constraints of a new unified dark fluid and the $H_0$ tension
• Stable Models of superacceleration
• Dynamics in nonlocal linear models in the Friedmann-Robertson-Walker metric
• Are Light Sterile Neutrinos Preferred or Disfavored by Cosmology?
• Cosmic acceleration in a model of scalar-tensor gravitation