The Integrated Sachs-Wolfe effect as a probe of non-standard cosmological evolution

2003/12/19 by Tuomas Multamäki, T. Multamaki, Ø. Elgarøy +1 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Radio Astronomy Observations and Technology #astro-ph

paper · pdf · doi:10.1051/0004-6361:20041104

published as Astron.Astrophys. 423 (2004) 811-819 · 18 pages, 8 figures

arxiv created 2003/12/19 · openalex publication_date 2004/08/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

The Integrated Sachs-Wolfe effect is studied in non-standard cosmologies. By considering flat universes, it is shown how the quadrupole power can in principle be effectively suppressed by atypical evolution of the scale factor at a high redshift. However, an efficient suppression requires models that are very difficult to realize. The effect on the overall normalization of the CMB power spectrum is also discussed as non-standard cosmologies can affect the overall normalization significantly and enhance the primordial fluctuations. The possibility of constraining such non-standard models with CMB and independent measures of , is discussed.

Citations

• The NRAO VLA Sky Survey
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results

Cited by

• THE EFFECTIVE THEORY OF INFLATION IN THE STANDARD MODEL OF THE UNIVERSE AND THE CMB+LSS DATA ANALYSIS
• Dark energy, integrated Sachs–Wolfe effect and large-scale magnetic fields