Aurora and airglow on the night side of Neptune
The latitude-longitude distribution of emissions detected by the Voyager ultraviolet spectrometer on the dark hemisphere of Neptune have been examined. The emissions have two significant geographic features: (1) a broad peak near longitude 60 deg W that extends rather uniformly over the entire range...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19900065486 2023-05-15T18:22:30+02:00 Aurora and airglow on the night side of Neptune Sandel, B. R. Herbert, F. Dessler, A. J. Hill, T. W. Unclassified, Unlimited, Publicly available Sep 1, 1990 http://ntrs.nasa.gov/search.jsp?R=19900065486 unknown http://ntrs.nasa.gov/search.jsp?R=19900065486 Accession ID: 90A52541 Copyright Other Sources 91 Geophysical Research Letters; 17; 1693-169 1990 ftnasantrs 2012-02-15T18:35:59Z The latitude-longitude distribution of emissions detected by the Voyager ultraviolet spectrometer on the dark hemisphere of Neptune have been examined. The emissions have two significant geographic features: (1) a broad peak near longitude 60 deg W that extends rather uniformly over the entire range of observed latitudes (55 deg S to 50 deg N); and (2) a brighter, narrower peak near the south pole and 240 deg W. The first peak is interpreted as due to excitation of the night side atmosphere by photoelectrons from the magnetically conjugate, sunlit atmosphere. The second peak can plausibly be attributed to a southern aurora; the field geometry would then seem to require a conjugate (and probably brighter) northern aurora that escaped detection poleward of the latitude range sampled by the UVS data. The power for such an aurora could be extracted from Neptune's rotation by the injection of plasma at Triton's orbit at a rate dm/dt of about 1 kg/s. Other/Unknown Material South pole NASA Technical Reports Server (NTRS) South Pole Broad Peak ENVELOPE(-71.231,-71.231,70.495,70.495) |
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NASA Technical Reports Server (NTRS) |
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unknown |
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91 |
spellingShingle |
91 Sandel, B. R. Herbert, F. Dessler, A. J. Hill, T. W. Aurora and airglow on the night side of Neptune |
topic_facet |
91 |
description |
The latitude-longitude distribution of emissions detected by the Voyager ultraviolet spectrometer on the dark hemisphere of Neptune have been examined. The emissions have two significant geographic features: (1) a broad peak near longitude 60 deg W that extends rather uniformly over the entire range of observed latitudes (55 deg S to 50 deg N); and (2) a brighter, narrower peak near the south pole and 240 deg W. The first peak is interpreted as due to excitation of the night side atmosphere by photoelectrons from the magnetically conjugate, sunlit atmosphere. The second peak can plausibly be attributed to a southern aurora; the field geometry would then seem to require a conjugate (and probably brighter) northern aurora that escaped detection poleward of the latitude range sampled by the UVS data. The power for such an aurora could be extracted from Neptune's rotation by the injection of plasma at Triton's orbit at a rate dm/dt of about 1 kg/s. |
format |
Other/Unknown Material |
author |
Sandel, B. R. Herbert, F. Dessler, A. J. Hill, T. W. |
author_facet |
Sandel, B. R. Herbert, F. Dessler, A. J. Hill, T. W. |
author_sort |
Sandel, B. R. |
title |
Aurora and airglow on the night side of Neptune |
title_short |
Aurora and airglow on the night side of Neptune |
title_full |
Aurora and airglow on the night side of Neptune |
title_fullStr |
Aurora and airglow on the night side of Neptune |
title_full_unstemmed |
Aurora and airglow on the night side of Neptune |
title_sort |
aurora and airglow on the night side of neptune |
publishDate |
1990 |
url |
http://ntrs.nasa.gov/search.jsp?R=19900065486 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-71.231,-71.231,70.495,70.495) |
geographic |
South Pole Broad Peak |
geographic_facet |
South Pole Broad Peak |
genre |
South pole |
genre_facet |
South pole |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19900065486 Accession ID: 90A52541 |
op_rights |
Copyright |
_version_ |
1766201904216408064 |