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Power spectrum precision for redshift space distortions

Title
Power spectrum precision for redshift space distortions
Authors
Linder E.V.Samsing J.
Ewha Authors
Eric V. Linder
Issue Date
2013
Journal Title
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516JCR Link
Citation
vol. 2013, no. 2
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Redshift space distortions in galaxy clustering offer a promising technique for probing the growth rate of structure and testing dark energy properties and gravity. We consider the issue of to what accuracy they need to be modeled in order not to unduly bias cosmological conclusions. Fitting for nonlinear and redshift space corrections to the linear theory real space density power spectrum in bins in wavemode, we analyze both the effect of marginalizing over these corrections and of the bias due to not correcting them fully. While naively subpercent accuracy is required to avoid bias in the unmarginalized case, in the fitting approach the Kwan-Lewis-Linder reconstruction function for redshift space distortions is found to be accurately selfcalibrated with little degradation in dark energy and gravity parameter estimation for a next generation galaxy redshift survey such as BigBOSS. © 2013 IOP Publishing Ltd and Sissa Medialab srl.
DOI
10.1088/1475-7516/2013/02/025
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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