Journal Article

Models of interacting dark energy

D. Rowland and I. B. Whittingham

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 390, issue 4, pages 1719-1726
Published in print November 2008 | ISSN: 0035-8711
Published online October 2008 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.13863.x
Models of interacting dark energy

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We investigate the interaction between dark energy and dark matter using a phenomenological model with an interaction proportional to the dark energy density and two physically motivated models, interacting holographic dark energy and mass varying neutrino dark energy. Constraints on the interaction parameters are obtained using observational data including the gold type Ia supernovae set, the cosmic microwave background (CMB) shift parameter from the 3-yr Wilkinson Microwave Anisotropy Probe, the baryon acoustic oscillation parameter A from the Sloan Digital Sky Survey and the time-dependent observables of the lookback time to high-redshift galactic clusters. We find that the available data can be satisfied reasonably well for a wide range of parameters in the models studied and that the CMB parameter appears to have the most discriminating power between the models.

Keywords: cosmology: theory; dark matter; large-scale structure of Universe

Journal Article.  4743 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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