2013/09/25 by Xin Wang, Gong-Bo Zhao, Gong‐Bo Zhao +2
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Radio Astronomy Observations and Technology #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.1309.6624
5 pages, 2 figures, typos fixed, conclusion unchanged
openalex publication_date 2013/09/25 · arxiv created 2014/01/27 · arxiv updated 2014/01/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We develop an accurate and efficient Bayesian method to reconstruct the primordial power spectrum in a model-independent way, and apply it to the latest cosmic microwave background measurement from Planck mission, and the large scale structure observation of SDSS-III BOSS (CMASS) sample, combined with the type Ia supernovae sample (SNLS 3-year) and the measurements of baryon acoustic oscillations from SDSS-II, 6dF, and WiggleZ survey. We confirm that the scale-invariant primordial power spectrum is strongly disfavored, and a model with suppressed power on horizon scales is supported by current data. We also find that a modulation on scales 5×10-4~\textrmMpc-1 \lesssim k \lesssim 0.01~\textrmMpc-1 is mildly preferred at 2σ confidence level, whose origin needs further investigation.