Λ is Coming: Parametrizing Freezing Fields
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Date
2017-03-21
Authors
Linder, Eric V.
Journal Title
Journal ISSN
Volume Title
Publisher
International conference "ECL17: Exploring the Energetic Universe 2017", Nazarbayev University Energetic Cosmic Laboratory
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.
Description
Keywords
freezing fields, dark energy, cosmology, Hubble parameter, Research Subject Categories::NATURAL SCIENCES::Physics::Astronomy and astrophysics::Cosmology
Citation
Linder, Eric V. (2017) Λ is Coming: Parametrizing Freezing Fields. International conference "ECL17: Exploring the Energetic Universe 2017", Nazarbayev University Energetic Cosmic Laboratory