Λ Is coming: Parametrizing freezing fields

Eric V. Linder

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We explore freezing dark energy, where the evolution of the field approaches that of a cosmological constant at late times. We propose two general, two parameter forms to describe the class of freezing field models, in analogy to ones for thawing fields, here based on the physics of the flow parameter or the calibrated w–w′ phase space. Observables such as distances and Hubble parameters are fit to within 0.1%, and the dark energy equation of state generally to within better than 1%, of the exact numerical solutions.

Original languageEnglish
Pages (from-to)11-14
Number of pages4
JournalAstroparticle Physics
Volume91
DOIs
Publication statusPublished - May 1 2017
Externally publishedYes

Keywords

  • Cosmological constant
  • Cosmological distances
  • Dark energy

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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