EDP Sciences
Free access
Volume 476, Number 3, December IV 2007
Page(s) 1145 - 1150
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361:20053151

A&A 476, 1145-1150 (2007)
DOI: 10.1051/0004-6361:20053151

Dust distribution during reionization

E. Elfgren1, F.-X. Désert2, and B. Guiderdoni3

1  Department of Physics, Luleå University of Technology, 971 87 Luleå, Sweden
    e-mail: elf@ludd.luth.se
2  Laboratoire d'Astrophysique, Observatoire de Grenoble, BP 53, 414 rue de la piscine, 38041 Grenoble Cedex 9, France
3  Université Lyon 1, Centre de Recherche Astrophysique de Lyon, Observatoire de Lyon, 9 avenue Charles André, 69230 Saint Genis Laval; CNRS, UMR 5574, France

(Received 29 March 2005 / Accepted 8 October 2007)

Context. The dust produced by the first generation of stars will be a foreground to cosmic microwave background.
Aims. In order to evaluate the effect of this early dust, we calculate the power spectrum of the dust emission anisotropies and compare it with the sensitivity limit of the Planck satellite.
Methods. The spatial distribution of the dust is estimated through the distribution of dark matter.
Results. At small angular scales $(\ell \gtrsim 1000)$ the dust signal is found to be noticeable with the Planck detector for certain values of dust lifetime and production rates. The dust signal is also compared to sensitivities of other instruments. The early dust emission anisotropies are finally compared to those of local dustand they are found to be similar in magnitude at mm wavelengths.

Key words: cosmology: cosmic microwave background -- cosmology: early Universe -- infrared: general

© ESO 2007