EDP Sciences
Free Access
Volume 423, Number 3, September I 2004
Page(s) 811 - 819
Section Cosmology (including clusters of galaxies)
DOI https://doi.org/10.1051/0004-6361:20041104

A&A 423, 811-819 (2004)
DOI: 10.1051/0004-6361:20041104

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

T. Multamäki 1 and Ø. Elgarøy 2, 1

1  NORDITA, Blegdamsvej 17, 2100, Copenhagen, Denmark
    e-mail: tuomas@nordita.dk
2  Institute of theoretical astrophysics, University of Oslo, PO Box 1029, 0315 Oslo, Norway

(Received 16 April 2004 / 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  $\sigma_8$, is discussed.

Key words: cosmology: theory -- cosmology: cosmic microwave background -- cosmology: large-scale structure of Universe

© ESO 2004

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.