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Title: The traces of anisotropic dark energy in light of Planck
Authors : Cardona, Wilmar
Hollenstein, Lukas
Kunz, Martin
Published in : Journal of Cosmology and Astroparticle Physics
Volume(Issue) : 2014
Issue : 7/32
Publisher / Ed. Institution : Institute of Physics Publishing
Issue Date: 16-Jul-2014
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Cosmological parameters from CMBR; Dark energy theory; Modified gravity
Subject (DDC) : 530: Physics
Abstract: We study a dark energy model with non-zero anisotropic stress, either linked to the dark energy density or to the dark matter density. We compute approximate solutions that allow to characterise the behaviour of the dark energy model and to assess the stability of the perturbations. We also determine the current limits on such an anisotropic stress from the cosmic microwave background data by the Planck satellite, and derive the corresponding constraints on the modified growth parameters like the growth index, the effective Newton's constant and the gravitational slip.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Applied Simulation (IAS)
Publication type: Article in scientific Journal
DOI : 10.1088/1475-7516/2014/07/032
ISSN: 1475-7516
Appears in Collections:Publikationen Life Sciences und Facility Management

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