The Integrated Sachs-Wolfe effect as a probe of non-standard cosmological evolution
NORDITA, Blegdamsvej 17, 2100, Copenhagen, Denmark e-mail: email@example.com
2 Institute of theoretical astrophysics, University of Oslo, PO Box 1029, 0315 Oslo, Norway
Accepted: 19 May 2004
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.
Key words: cosmology: theory / cosmology: cosmic microwave background / cosmology: large-scale structure of Universe
© ESO, 2004