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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

Baojiu Li



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.

Journal Article Type Article
Publication Date Aug 15, 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
APA6 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), https://doi.org/10.1103/physrevd.100.043525
DOI https://doi.org/10.1103/physrevd.100.043525
Keywords Physics and Astronomy (miscellaneous)
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.043525

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