Observations of the Polar Magnetic Fields
Results from observations of the polar magnetic fields made in 1968 with the Mount Wilson magnetograph are reported. The field was of south polarity near the heliographic north pole and of north polarity near the south pole. The inversion line of the field was at latitude +70° in the north hemispher...
Published in: | Symposium - International Astronomical Union |
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Language: | English |
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Cambridge University Press (CUP)
1971
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Online Access: | http://dx.doi.org/10.1017/s0074180900023172 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0074180900023172 |
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crcambridgeupr:10.1017/s0074180900023172 2024-03-03T08:48:50+00:00 Observations of the Polar Magnetic Fields Stenflo, Jan Olof 1971 http://dx.doi.org/10.1017/s0074180900023172 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0074180900023172 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Symposium - International Astronomical Union volume 43, page 714-724 ISSN 0074-1809 journal-article 1971 crcambridgeupr https://doi.org/10.1017/s0074180900023172 2024-02-08T08:26:29Z Results from observations of the polar magnetic fields made in 1968 with the Mount Wilson magnetograph are reported. The field was of south polarity near the heliographic north pole and of north polarity near the south pole. The inversion line of the field was at latitude +70° in the north hemisphere and −55° in the south, which coincides with the position of the polar prominence zones at that time. Observations made simultaneously at the Crimean Astrophysical Observatory are in good agreement with the Mt. Wilson data and confirm the latitude variation of the field. A few hundred of Hale's plates from 1914, which he had used to determine the Sun's general magnetic field, have been remeasured. The plates were automatically scanned with a digitized microphotometer, and the treatment of the data was made with a computer. While the visual measurements by Van Maanen had given a strong general field similar to that of a dipole, the computer reductions did not reveal any significant field (stronger than 5 G) at any latitude. Article in Journal/Newspaper South pole Cambridge University Press South Pole North Pole Mount Wilson ENVELOPE(176.250,176.250,-70.583,-70.583) Symposium - International Astronomical Union 43 714 724 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Results from observations of the polar magnetic fields made in 1968 with the Mount Wilson magnetograph are reported. The field was of south polarity near the heliographic north pole and of north polarity near the south pole. The inversion line of the field was at latitude +70° in the north hemisphere and −55° in the south, which coincides with the position of the polar prominence zones at that time. Observations made simultaneously at the Crimean Astrophysical Observatory are in good agreement with the Mt. Wilson data and confirm the latitude variation of the field. A few hundred of Hale's plates from 1914, which he had used to determine the Sun's general magnetic field, have been remeasured. The plates were automatically scanned with a digitized microphotometer, and the treatment of the data was made with a computer. While the visual measurements by Van Maanen had given a strong general field similar to that of a dipole, the computer reductions did not reveal any significant field (stronger than 5 G) at any latitude. |
format |
Article in Journal/Newspaper |
author |
Stenflo, Jan Olof |
spellingShingle |
Stenflo, Jan Olof Observations of the Polar Magnetic Fields |
author_facet |
Stenflo, Jan Olof |
author_sort |
Stenflo, Jan Olof |
title |
Observations of the Polar Magnetic Fields |
title_short |
Observations of the Polar Magnetic Fields |
title_full |
Observations of the Polar Magnetic Fields |
title_fullStr |
Observations of the Polar Magnetic Fields |
title_full_unstemmed |
Observations of the Polar Magnetic Fields |
title_sort |
observations of the polar magnetic fields |
publisher |
Cambridge University Press (CUP) |
publishDate |
1971 |
url |
http://dx.doi.org/10.1017/s0074180900023172 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0074180900023172 |
long_lat |
ENVELOPE(176.250,176.250,-70.583,-70.583) |
geographic |
South Pole North Pole Mount Wilson |
geographic_facet |
South Pole North Pole Mount Wilson |
genre |
South pole |
genre_facet |
South pole |
op_source |
Symposium - International Astronomical Union volume 43, page 714-724 ISSN 0074-1809 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0074180900023172 |
container_title |
Symposium - International Astronomical Union |
container_volume |
43 |
container_start_page |
714 |
op_container_end_page |
724 |
_version_ |
1792505853880827904 |