Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career.
An examination is made of Antarctic dayside auroras to establish how they relate to solar wind strength under the quiet conditions of the recent extended solar minimum when the solar wind pressure was weak and the interplanetary magnetic field B z is small. It is found that, during the many days of...
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crcansciencepubl:10.1139/p11-137 2023-12-17T10:21:26+01:00 Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. McEwen, D.J. Sivjee, G.G. 2012 http://dx.doi.org/10.1139/p11-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/p11-137 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Physics volume 90, issue 8, page 753-758 ISSN 0008-4204 1208-6045 General Physics and Astronomy journal-article 2012 crcansciencepubl https://doi.org/10.1139/p11-137 2023-11-19T13:39:02Z An examination is made of Antarctic dayside auroras to establish how they relate to solar wind strength under the quiet conditions of the recent extended solar minimum when the solar wind pressure was weak and the interplanetary magnetic field B z is small. It is found that, during the many days of observation, the aurora is detected even with the most stable and quiet conditions. On such occasions the 630 nm OI emission can be as low as 50 R, but is unambiguously and continuously detectable through each noon. This is above an airglow intensity of about 30 R. For these quiet conditions there is no evident relation between the solar wind dynamic pressure or interplanetary magnetic field B z and dayside auroral intensity. This suggests that there is no effective reconnection under these minimal conditions and the particle source for the dayside aurora could be within the magnetosphere. Article in Journal/Newspaper Antarc* Antarctic Canadian Science Publishing (via Crossref) Antarctic Canadian Journal of Physics 90 8 753 758 |
institution |
Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Physics and Astronomy |
spellingShingle |
General Physics and Astronomy McEwen, D.J. Sivjee, G.G. Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. |
topic_facet |
General Physics and Astronomy |
description |
An examination is made of Antarctic dayside auroras to establish how they relate to solar wind strength under the quiet conditions of the recent extended solar minimum when the solar wind pressure was weak and the interplanetary magnetic field B z is small. It is found that, during the many days of observation, the aurora is detected even with the most stable and quiet conditions. On such occasions the 630 nm OI emission can be as low as 50 R, but is unambiguously and continuously detectable through each noon. This is above an airglow intensity of about 30 R. For these quiet conditions there is no evident relation between the solar wind dynamic pressure or interplanetary magnetic field B z and dayside auroral intensity. This suggests that there is no effective reconnection under these minimal conditions and the particle source for the dayside aurora could be within the magnetosphere. |
format |
Article in Journal/Newspaper |
author |
McEwen, D.J. Sivjee, G.G. |
author_facet |
McEwen, D.J. Sivjee, G.G. |
author_sort |
McEwen, D.J. |
title |
Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. |
title_short |
Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. |
title_full |
Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. |
title_fullStr |
Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. |
title_full_unstemmed |
Photometry of dayside auroras during solar minimum 1 This article is part of a Special issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career. |
title_sort |
photometry of dayside auroras during solar minimum 1 this article is part of a special issue that honours the work of dr. donald m. hunten frsc who passed away in december 2010 after a very illustrious career. |
publisher |
Canadian Science Publishing |
publishDate |
2012 |
url |
http://dx.doi.org/10.1139/p11-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/p11-137 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Canadian Journal of Physics volume 90, issue 8, page 753-758 ISSN 0008-4204 1208-6045 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/p11-137 |
container_title |
Canadian Journal of Physics |
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90 |
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8 |
container_start_page |
753 |
op_container_end_page |
758 |
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1785534414407598080 |