A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments
We compute the circularly polarized signal from atmospheric molecular oxygen. The polarization of O2 rotational lines is caused by the Zeeman effect in the Earth’s magnetic field. We evaluate the circularly polarized emission for various sites suitable for cosmic microwave background (CMB) measureme...
Published in: | Monthly Notices of the Royal Astronomical Society |
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2011
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Online Access: | http://hdl.handle.net/10281/21801 https://doi.org/10.1111/j.1365-2966.2011.18625.x |
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ftunivmilanobic:oai:boa.unimib.it:10281/21801 2024-04-14T08:04:06+00:00 A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments SPINELLI, SEBASTIANO MAURO TARTARI, ANDREA ZANNONI, MARIO GERVASI, MASSIMO Fabbian, G Spinelli, S Fabbian, G Tartari, A Zannoni, M Gervasi, M 2011 http://hdl.handle.net/10281/21801 https://doi.org/10.1111/j.1365-2966.2011.18625.x eng eng Priestley and Weale country:OXFORD info:eu-repo/semantics/altIdentifier/wos/WOS:000293178600037 volume:414 issue:4 firstpage:3272 lastpage:3280 journal:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY http://hdl.handle.net/10281/21801 doi:10.1111/j.1365-2966.2011.18625.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79959842017 Atmospheric effect Cosmic background radiation Cosmology: observation Techniques: polarimetric FIS/05 - ASTRONOMIA E ASTROFISICA info:eu-repo/semantics/article 2011 ftunivmilanobic https://doi.org/10.1111/j.1365-2966.2011.18625.x 2024-03-21T16:35:57Z We compute the circularly polarized signal from atmospheric molecular oxygen. The polarization of O2 rotational lines is caused by the Zeeman effect in the Earth’s magnetic field. We evaluate the circularly polarized emission for various sites suitable for cosmic microwave background (CMB) measurements: the South Pole and Dome C (Antarctica), Atacama (Chile) and Testa Grigia (Italy). We present and discuss an analysis of the polarized signal within the framework of future CMB polarization experiments. We find a typical circularly polarized signal (V Stokes parameter) of 50–300 μK at 90 GHz looking at the zenith. Among the sites, Atacama shows a lower polarized signal at the zenith. We present maps of this signal for the various sites and we show typical elevation and azimuth scans. We find that Dome C presents the lowest gradient in polarized temperature: 0.3 μK/deg at 90 GHz. We also study the frequency bands of observation: around ν=100 GHz and ν=160 GHz, we find the best conditions because the polarized signal vanishes. Finally, we evaluate the accuracy of the templates and the signal variability in relation to our knowledge of and the variability of the Earth’s magnetic field and atmospheric parameters. We compute the circularly polarized signal from atmospheric molecular oxygen. The polarization of O2 rotational lines is caused by the Zeeman effect in the Earth's magnetic field. We evaluate the circularly polarized emission for various sites suitable for cosmic microwave background (CMB) measurements: the South Pole and Dome C (Antarctica), Atacama (Chile) and Testa Grigia (Italy). We present and discuss an analysis of the polarized signal within the framework of future CMB polarization experiments. We find a typical circularly polarized signal (V Stokes parameter) of ∼50-300μK at 90GHz looking at the zenith. Among the sites, Atacama shows a lower polarized signal at the zenith. We present maps of this signal for the various sites and we show typical elevation and azimuth scans. We find that Dome C ... Article in Journal/Newspaper Antarc* Antarctica South pole South pole Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) South Pole Monthly Notices of the Royal Astronomical Society 414 4 3272 3280 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Atmospheric effect Cosmic background radiation Cosmology: observation Techniques: polarimetric FIS/05 - ASTRONOMIA E ASTROFISICA |
spellingShingle |
Atmospheric effect Cosmic background radiation Cosmology: observation Techniques: polarimetric FIS/05 - ASTRONOMIA E ASTROFISICA SPINELLI, SEBASTIANO MAURO TARTARI, ANDREA ZANNONI, MARIO GERVASI, MASSIMO Fabbian, G A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments |
topic_facet |
Atmospheric effect Cosmic background radiation Cosmology: observation Techniques: polarimetric FIS/05 - ASTRONOMIA E ASTROFISICA |
description |
We compute the circularly polarized signal from atmospheric molecular oxygen. The polarization of O2 rotational lines is caused by the Zeeman effect in the Earth’s magnetic field. We evaluate the circularly polarized emission for various sites suitable for cosmic microwave background (CMB) measurements: the South Pole and Dome C (Antarctica), Atacama (Chile) and Testa Grigia (Italy). We present and discuss an analysis of the polarized signal within the framework of future CMB polarization experiments. We find a typical circularly polarized signal (V Stokes parameter) of 50–300 μK at 90 GHz looking at the zenith. Among the sites, Atacama shows a lower polarized signal at the zenith. We present maps of this signal for the various sites and we show typical elevation and azimuth scans. We find that Dome C presents the lowest gradient in polarized temperature: 0.3 μK/deg at 90 GHz. We also study the frequency bands of observation: around ν=100 GHz and ν=160 GHz, we find the best conditions because the polarized signal vanishes. Finally, we evaluate the accuracy of the templates and the signal variability in relation to our knowledge of and the variability of the Earth’s magnetic field and atmospheric parameters. We compute the circularly polarized signal from atmospheric molecular oxygen. The polarization of O2 rotational lines is caused by the Zeeman effect in the Earth's magnetic field. We evaluate the circularly polarized emission for various sites suitable for cosmic microwave background (CMB) measurements: the South Pole and Dome C (Antarctica), Atacama (Chile) and Testa Grigia (Italy). We present and discuss an analysis of the polarized signal within the framework of future CMB polarization experiments. We find a typical circularly polarized signal (V Stokes parameter) of ∼50-300μK at 90GHz looking at the zenith. Among the sites, Atacama shows a lower polarized signal at the zenith. We present maps of this signal for the various sites and we show typical elevation and azimuth scans. We find that Dome C ... |
author2 |
Spinelli, S Fabbian, G Tartari, A Zannoni, M Gervasi, M |
format |
Article in Journal/Newspaper |
author |
SPINELLI, SEBASTIANO MAURO TARTARI, ANDREA ZANNONI, MARIO GERVASI, MASSIMO Fabbian, G |
author_facet |
SPINELLI, SEBASTIANO MAURO TARTARI, ANDREA ZANNONI, MARIO GERVASI, MASSIMO Fabbian, G |
author_sort |
SPINELLI, SEBASTIANO MAURO |
title |
A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments |
title_short |
A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments |
title_full |
A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments |
title_fullStr |
A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments |
title_full_unstemmed |
A template of atmospheric O2 circularly polarized emission for cosmic microwave background experiments |
title_sort |
template of atmospheric o2 circularly polarized emission for cosmic microwave background experiments |
publisher |
Priestley and Weale |
publishDate |
2011 |
url |
http://hdl.handle.net/10281/21801 https://doi.org/10.1111/j.1365-2966.2011.18625.x |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Antarc* Antarctica South pole South pole |
genre_facet |
Antarc* Antarctica South pole South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000293178600037 volume:414 issue:4 firstpage:3272 lastpage:3280 journal:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY http://hdl.handle.net/10281/21801 doi:10.1111/j.1365-2966.2011.18625.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79959842017 |
op_doi |
https://doi.org/10.1111/j.1365-2966.2011.18625.x |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
414 |
container_issue |
4 |
container_start_page |
3272 |
op_container_end_page |
3280 |
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1796300484853628928 |