2003/01/31 by Pia Mukherjee, Yun Wang
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #astro-ph #hep-ph
paper · pdf · doi:10.1086/376500
published as Astrophys.J. 593 (2003) 38 · revised version accepted by ApJ
arxiv created 2003/04/23 · openalex publication_date 2003/08/04 · arxiv updated 2009/11/30 · openalex created_date 2021/02/01 · openalex updated_date 2026/07/31
Measuring the primordial matter power spectrum is our primary means of probing unknown physics in the very early universe. We allow the primordial power spectrum to be an arbitrary function and parameterize it in terms of wavelet band powers. Current cosmological data correspond to 11 such wavelet bands. We derive constraints on these band powers as well as H 0 , Ω b h 2 , and Ω m h 2 from current cosmic microwave background anisotropy data using the Markov chain Monte Carlo technique. Our results indicate a feature in the primordial power spectrum at 0.008 ≲ k /( h Mpc -1 ) ≲ 0.1. Wilkinson Microwave Anisotropy Probe and Planck data should allow us to put tighter constraints on the primordial power spectrum.