2004/05/31 by Jerome Martin, Jérôme Martin, Christophe Ringeval · 2 citations
Physics and Astronomy · #Amplitude #Astrophysics #Baryon acoustic oscillations #Black Holes and Theoretical Physics #CMB cold spot #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Monte Carlo method #Parameter space #Phase space #Physics #Quantum mechanics #Scale (ratio) #Space (punctuation) #Spectral density #Statistical physics #Statistics #Theoretical physics #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2005/01/007
published as JCAP 0501 (2005) 007 · 13 pages, 4 figures, uses iopart, matches published version
openalex publication_date 2005/01/13 · arxiv created 2005/01/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The space of parameters characterizing an inflationary primordial power spectrum with small superimposed oscillations is explored using Monte Carlo methods. The most interesting region corresponding to high frequency oscillations is included in the analysis. The oscillations originate from some new physics taking place at the beginning of the inflationary phase and characterized by the new energy scale M c . It is found that the standard slow roll model remains the most probable one given the first-year WMAP data. At the same time, the oscillatory models fit the data better on average, which is consistent with previous works on the subject. This is typical of a situation where volume effects in the parameter space play a significant role. Then, we find the amplitude of the oscillations to be less than 22% of the mean amplitude and the new scale M c to be such that H / M c <6.6 × 10 −4 at 1σ level, where H is the scale of inflation.