| Issue |
A&A
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 | |
| Published online | 12 August 2004 | |
The Integrated Sachs-Wolfe effect as a probe of non-standard cosmological evolution
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 
,
is discussed.
Key words: cosmology: theory / cosmology: cosmic microwave background / cosmology: large-scale structure of Universe
© ESO, 2004
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