Observing cosmic microwave background polarisation through ice

Pietranera, LucaSchool of Physics and Astronomy, University of Manchester, Manchester, United Kingdom; School of Physics and Astronomy, Cardiff University, Cardiff, United Kingdom (författare)

Validerad; 2007; 20070427 (pafi)
Ice crystal clouds in the upper troposphere can generate polarization signals at the μK level. This signal can seriously affect very sensitive ground-based searches for E and B modes of cosmic microwave background polarization. In this paper, we estimate this effect within the CℓOVER experiment observing bands (97, 150 and 220 GHz) for the selected observing site (Llano de Chajnantor, Atacama desert, Chile). The results show that the polarization signal from the clouds can be of the order of or even bigger than the cosmic microwave background expected polarization. Climatological data suggest that this signal is fairly constant over the whole year in Antarctica. On the other hand, the stronger seasonal variability in Atacama allows for a 50 per cent of clean observations during the dry season.

Buehler, StefanInstitut fr Umweltphysik, Universität Bremen, Bremen, Germany(Swepub:ltu)sbuehler (författare)
Calisse, Paolo G.School of Physics and Astronomy, Cardiff University, Cardiff, United Kingdom (författare)
Emde, ClaudiaDeutsches Zentrum fuer Luft- und Raumfahrt (DLR), Institut fuer Physik der Atmosphaere, Oberpfaffenhofen, Germany (författare)
Hayton, DarrenSchool of Physics and Astronomy, Cardiff University, Cardiff, United Kingdom (författare)
John, Viju OommenRosenstiel School of Marine and Atmospheric Sciences, University of Miami, United States (författare)
Maffei, BrunoSchool of Physics and Astronomy, University of Manchester, Manchester, United Kingdom (författare)
Piccirillo, LucioSchool of Physics and Astronomy, University of Manchester, Manchester, United Kingdom (författare)
Pisano, GiampaoloSchool of Physics and Astronomy, University of Manchester, Manchester, United Kingdom (författare)
Savini, GiorgioSchool of Physics and Astronomy, Cardiff University, Cardiff, United Kingdom (författare)
Sreerekha, T. R.Met Office, Exeter, United Kingdom (författare)
School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom; School of Physics and Astronomy, Cardiff University, Cardiff, United KingdomInstitut fr Umweltphysik, Universität Bremen, Bremen, Germany (creator_code:org_t)

Ingår i:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)376:2, s. 645-6500035-87111365-2966

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