van de Bruck, C., Mifsud, J. and Morrice, J. (2017) Testing coupled dark energy models with their cosmological background evolution. Physical Review D, 95 (4). ISSN 2470-0010
Abstract
We consider a cosmology in which dark matter and a quintessence scalar field responsible for the acceleration of the Universe are allowed to interact. Allowing for both conformal and disformal couplings, we perform a global analysis of the constraints on our model using Hubble parameter measurements, baryon acoustic oscillation distance measurements, and a Supernovae Type Ia data set. We find that the additional disformal coupling relaxes the conformal coupling constraints. Moreover, we show that, at the background level, a disformal interaction within the dark sector is preferred to both ACDM and uncoupled quintessence, hence favoring interacting dark energy.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Physical Society. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 01 Jun 2017 10:11 |
Last Modified: | 01 Jun 2017 10:11 |
Published Version: | https://doi.org/10.1103/PhysRevD.95.043513 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevD.95.043513 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:117069 |