EDP Sciences
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Volume 387, Number 2, May IV 2002
Page(s) 379 - 382
Section Cosmology
DOI http://dx.doi.org/10.1051/0004-6361:20020371

A&A 387, 379-382 (2002)
DOI: 10.1051/0004-6361:20020371

The Rees-Sciama effect and the primordial nucleosynthesis

A. Mészáros

Astronomical Institute of the Charles University, V Holesovickách 2, 180 00 Prague 8, Czech Republic

(Received 21 November 2001 / Accepted 12 February 2002)

It is known that, theoretically, the Rees-Sciama effect may cause arbitrarily large additional redshifts in the cosmic microwave background radiation due to transparent expanding voids having sizes comparable with the size of horizon. Therefore, again theoretically, eventual huge voids existing immediately after the recombination may essentially change the predictions of the theory of big bang nucleosynthesis. If this eventuality holds, then the dark matter can be dominantly baryonic and, simultaneously, one can be in accordance with the predictions of primordial nucleosynthesis theory. Studying this eventuality one arrives at the result that the observed extreme isotropy of the cosmic microwave background radiation rejects the existence of any such huge voids, and hence this eventuality does not hold.

Key words: cosmic microwave background -- dark matter -- early Universe -- cosmology: miscellaneous

© ESO 2002