Document - Extracting cosmic microwave background polarization from satellite astrophysical maps

2004

Journal article Open Access

Extracting cosmic microwave background polarization from satellite astrophysical maps

Baccigalupi C., Perrotta F., De Zotti G., Smoot G. F., Burigana C., Maino D., Bedini L., Salerno E.

methods: data analysis Astrophysics techniques: image processing Astrophysics (astro-ph) Astronomy and Astrophysics Settore FIS/05 - Astronomia e Astrofisica cosmic microwave background cosmic microwave FOS: Physical sciences data analysis [methods] Space and Planetary Science image processing [techniques]

We present the application of the fast independent component analysis (FASTICA) technique for blind component separation to polarized astrophysical emission. We study how the cosmic microwave background (CMB) polarized signal, consisting of E and B modes, can be extracted from maps affected by substantial contamination from diffuse galactic foreground emission and instrumental noise. We implement Monte Carlo chains varying the CMB and noise realizations in order to assess the average capabilities of the algorithm and their variance. We perform the analysis of all-sky maps simulated according to the Planck satellite capabilities, modelling the sky signal as a superposition of teh CMB and of the existing simulated polarization templates of galactic synchrotron. Our results indicate that teh angular power spectrum of CMB E mode can be recovered an all scales up to l=1000, corresponding to the fourth acoustic oscillation, while the B-mode power spectrum can be detected, up to its turnover al l=100, if the ratio of tensor to scalar contributions to the temperature quadrupole exceeds 30 percent. The power spectrum of the cross-correlation between total intensity and polarization, TE, can be recovered up to l=1200, corresponding to the seventh TE acoustic oscillation.

Source: Monthly notices of the Royal Astronomical Society (Print) 354 (2004): 55–70. doi:10.1111/j.1365-2966.2004.08168.x

Publisher: Blackwell Scientific Publications, Oxford , Regno Unito

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@article{oai:it.cnr:prodotti:43757,
	title = {Extracting cosmic microwave background polarization from satellite astrophysical maps},
	author = {Baccigalupi C. and Perrotta F. and De Zotti G. and Smoot G. F. and Burigana C. and Maino D. and Bedini L. and Salerno E.},
	publisher = {Blackwell Scientific Publications, Oxford , Regno Unito},
	doi = {10.1111/j.1365-2966.2004.08168.x and 10.48550/arxiv.astro-ph/0209591},
	journal = {Monthly notices of the Royal Astronomical Society (Print)},
	volume = {354},
	pages = {55–70},
	year = {2004}
}