EDP Sciences
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Volume 393, Number 2, October II 2002
Page(s) 381 - 387
Section Cosmology
DOI http://dx.doi.org/10.1051/0004-6361:20021041

A&A 393, 381-387 (2002)
DOI: 10.1051/0004-6361:20021041

Cosmic Microwave Background anisotropies beyond the third peak

N. Aghanim1, 2, P. G. Castro3, A. Melchiorri3 and J. Silk3

1  IAS-CNRS, Université Paris Sud, Bât. 121, 91405 Orsay Cedex, France
2  IAP-CNRS, 98 bis Boulevard Arago, 75014 Paris, France
3  Denys Wilkinson Building, University of Oxford, Keble Road, Oxford, OX 3RH, UK

(Received 11 March 2002 / Accepted 11 July 2002)

Forthcoming Cosmic Microwave Background (CMB) experiments will allow us to accurately investigate the power spectrum at very small scales ( $\ell > 1000$). We predict the level of the primary anisotropies, given the actual CMB measurements. The secondary anisotropies generated after matter-radiation decoupling contribute additional power in the tail of the CMB power spectrum. Together with the primary anisotropies, we compute the predicted power spectra for three dominant secondary effects induced by photon scattering. We predict these secondary contributions in flat cosmological models for parameters in agreement (to $2\sigma$) with the values allowed by current parameter estimates.

Key words: cosmology: cosmic microwave background

Offprint request: N. Aghanim, Nabila.Aghanim@ias.u-psud.fr

© ESO 2002