Constraining models of f(R) gravity with Planck and WiggleZ power spectrum data

Dossett, Jason, Hu, Bin and Parkinson, David (2014) Constraining models of f(R) gravity with Planck and WiggleZ power spectrum data. Journal of Cosmology and Astroparticle Physics, 2014 3: . doi:10.1088/1475-7516/2014/03/046


Author Dossett, Jason
Hu, Bin
Parkinson, David
Title Constraining models of f(R) gravity with Planck and WiggleZ power spectrum data
Formatted title
Constraining models of f(R) gravity with Planck and WiggleZ power spectrum data
Journal name Journal of Cosmology and Astroparticle Physics   Check publisher's open access policy
ISSN 1475-7516
Publication date 2014-03
Year available 2014
Sub-type Article (original research)
DOI 10.1088/1475-7516/2014/03/046
Open Access Status
Volume 2014
Issue 3
Total pages 21
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2015
Language eng
Formatted abstract
In order to explain cosmic acceleration without invoking `'dark'' physics, we consider f(R) modified gravity models, which replace the standard Einstein-Hilbert action in General Relativity with a higher derivative theory. We use data from the WiggleZ Dark Energy survey to probe the formation of structure on large scales which can place tight constraints on these models. We combine the large-scale structure data with measurements of the cosmic microwave background from the Planck surveyor. After parameterizing the modification of the action using the Compton wavelength parameter B0, we constrain this parameter using ISiTGR, assuming an initial non-informative log prior probability distribution of this cross-over scale. We find that the addition of the WiggleZ power spectrum provides the tightest constraints to date on B0 by an order of magnitude, giving log10(B0) < −4.07 at 95% confidence limit. Finally, we test whether the effect of adding the lensing amplitude ALens and the sum of the neutrino mass ∑mν is able to reconcile current tensions present in these parameters, but find f(R) gravity an inadequate explanation.
Keyword Modified gravity
Cosmological parameters from LSS
Dark energy experiments
Cosmological parameters from CMBR
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article no. JCAP03(2014)046

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
 
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