Mifsud, J. and van de Bruck, C. (2017) Probing the imprints of generalized interacting dark energy on the growth of perturbations. Journal of Cosmology and Astroparticle Physics, 2017 (11). 001.
Abstract
We extensively study the evolution and distinct signatures of cosmological models, in which dark energy interacts directly with dark matter. We first focus on the imprints of these coupled models on the cosmic microwave background temperature power spectrum, in which we discuss the multipole peak separation together with the integrated Sachs-Wolfe effect. We also address the growth of matter perturbations, and disentangle the interacting dark energy models using the expansion history together with the growth history. We find that a disformal coupling between dark matter and dark energy induces intermediate-scales and time-dependent damped oscillatory features in the matter growth rate function, a unique characteristic of this coupling. Apart from the disformal coupling, we also consider conformally coupled models, together with models which simultaneously make use of both couplings.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 IOP Publishing Ltd and Sissa Medialab. This is an author produced version of a paper subsequently published in Journal of Cosmology and Astroparticle Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | cosmological perturbation theory; dark energy theory; integrated Sachs-Wolfe effect; modified gravity |
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: | 08 Aug 2017 09:34 |
Last Modified: | 06 Nov 2018 01:39 |
Published Version: | https://doi.org/10.1088/1475-7516/2017/11/001 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.1088/1475-7516/2017/11/001 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:119896 |