A new search for features in the primordial power spectrum

Details A new search for features in the primordial power spectrum A new search for features in the primordial power spectrum

2004-02-25

arxiv.org/abs/astro-ph/0402583v3

Mon.Not.Roy.Astron.Soc. 359 (2005) 31-35

Astronomy and Astrophysics

Astrophysics

revised version, conclusions unchanged, 7 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2005.08771.x

We develop a new approach toward a high resolution non-parametric reconstruction of the primordial power spectrum using WMAP cosmic microwave background temperature anisotropies that we confront with SDSS large-scale structure data in the range k~0.01-0.1 h/Mpc. We utilise the standard LambdaCDM cosmological model but we allow the baryon fraction to vary. In particular, for the concordance baryon fraction, we compare indications of a possible feature at k~0.05 h/Mpc in WMAP data with suggestions of similar features in large scale structure surveys.

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