Open AccessA new search for features in the primordial power spectrum
Author(s) -
TocchiniValentini Domenico,
Douspis Marian,
Silk Joseph
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.08771.x
Subject(s) - cmb cold spot , physics , cosmic microwave background , astrophysics , sky , spectral density , baryon , anisotropy , cosmology , cosmic background radiation , dark matter , scale (ratio) , cold dark matter , astronomy , observational cosmology , dark energy , optics , statistics , mathematics , quantum mechanics
We develop a new approach towards a high‐resolution non‐parametric reconstruction of the primordial power spectrum using the Wilkinson Microwave Anisotropy Probe ( WMAP ) cosmic microwave background temperature anisotropies that we confront with Sloan Digital Sky Survey large‐scale structure data in the range k ∼ 0.01–0.1 h Mpc −1 . We utilize the standard Λ cold dark matter 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 −1 in WMAP data with suggestions of similar features in large‐scale structure surveys.