Early dark energy constraints on growing neutrino quintessence cosmologies

Noble Chamings, Finlay; Avgoustidis, Anastasios; Copeland, Edmund J.; Green, Anne M.; Li, Baojiu

doi:10.1103/physrevd.100.043525

Early dark energy constraints on growing neutrino quintessence cosmologies

Noble Chamings, Finlay; Avgoustidis, Anastasios; Copeland, Edmund J.; Green, Anne M.; Li, Baojiu

Authors

Finlay Noble Chamings

Anastasios Avgoustidis

Edmund J. Copeland

Anne M. Green

Professor Baojiu Li baojiu.li@durham.ac.uk
Professor

Abstract

We investigate cosmological models in which dynamical dark energy consists of a scalar field whose present-day value is controlled by a coupling to the neutrino sector. The behavior of the scalar field depends on three functions: a kinetic function, the scalar field potential, and the scalar field-neutrino coupling function. We present an analytic treatment of the background evolution during radiation and matter domination for exponential and inverse power law potentials, and find a relaxation of constraints compared to previous work on the amount of early dark energy in the exponential case. We then carry out a numerical analysis of the background cosmology for both types of potential and various illustrative choices of the kinetic and coupling functions. By applying bounds from Planck on the amount of early dark energy, we are able to constrain the magnitude of the kinetic function at early times.

Citation

Noble Chamings, F., Avgoustidis, A., Copeland, E. J., Green, A. M., & Li, B. (2019). Early dark energy constraints on growing neutrino quintessence cosmologies. Physical Review D, 100(4), Article 043525. https://doi.org/10.1103/physrevd.100.043525

Journal Article Type	Article
Online Publication Date	Aug 13, 2019
Publication Date	Aug 31, 2019
Deposit Date	Jun 17, 2019
Publicly Available Date	Aug 20, 2019
Journal	Physical Review D
Print ISSN	2470-0010
Electronic ISSN	2470-0029
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	100
Issue	4
Article Number	043525
DOI	https://doi.org/10.1103/physrevd.100.043525

Files

Published Journal Article (584 Kb)
PDF

Copyright Statement
Reprinted with permission from the American Physical Society: Noble Chamings, Finlay, Avgoustidis, Anastasios, Copeland, Edmund J., Green, Anne M. & Li, Baojiu (2019). Early dark energy constraints on growing neutrino quintessence cosmologies. Physical Review D 100(4): 043525 © 2019 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.