Prof. Roy Maartens

Permanent URI for this collection

Position:	SKA/ SARChI Professor in Atronomy & Astrophysics
Department:	Physics
Faculty:	Faculty of Natural Sciences
Qualifications:	PhD (Cape Town)
	My publications in this repository
	Publications since 1995
More about me:	here, and here
Find out more about:	UWC Astrophysics
Tel:	021 959 3693
Fax:	021 959 3474
Email:	rmaartens@uwc.ac.za

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Probing the imprint of interacting dark energy on very large scales
(American Physical Society, 2015) Duniya, Didam, G. A.; Bertacca, Daniele; Maartens, Roy
The observed galaxy power spectrum acquires relativistic corrections from light-cone effects, and these corrections grow on very large scales. Future galaxy surveys in optical, infrared and radio bands will probe increasingly large wavelength modes and reach higher redshifts. In order to exploit the new data on large scales, an accurate analysis requires inclusion of the relativistic effects. This is especially the case for primordial non-Gaussianity and for extending tests of dark energy models to horizon scales. Here we investigate the latter, focusing on models where the dark energy interacts nongravitationally with dark matter. Interaction in the dark sector can also lead to large-scale deviations in the power spectrum. If the relativistic effects are ignored, the imprint of interacting dark energy will be incorrectly identified and thus lead to a bias in constraints on interacting dark energy on very large scales.