Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-05-15
Astronomy and Astrophysics
Astrophysics
16 pages, 12 figures. Accepted by Astronomy & Astrophysics
Scientific paper
10.1051/0004-6361:200810199
The rotational lines of carbon monoxide and the fine structure lines of CII and of the most abundant metals, emitted during the epoch of enhanced star formation in the universe, are redshifted in the frequency channels where the present-day and future CMB experiments are sensitive. We estimate the contribution to the CMB angular power spectrum by the emission in such lines in merging star-forming galaxies. We used the Lacey-Cole approach to characterize the distribution of the merging halos, together with a parametrization for the star formation rate in each of them. Using observational data from a sample of local, low-redshift, and high-redshift objects, we calibrated the luminosity in each line as a function of the star formation rate. We show that the correlation term arising from CO line emission is a significant source of foreground for CMB in a broad range of frequencies (in particular in the 20-60 GHz band) and for 1000
Hernández-Monteagudo Carlos
Righi Mattia
Sunyaev Rashid
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