From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum
International audience Based on elemental abundance ratios derived from the Ulysses COSPIN/LET measurements, we classified the energetic particle populations during and after the socalled Fast Latitude Scan ? the time period during which the Ulysses spacecraft traveled from the highest heliolatitude...
Main Authors: | , , , |
---|---|
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2003
|
Subjects: | |
Online Access: | https://hal.science/hal-00317101 https://hal.science/hal-00317101/document https://hal.science/hal-00317101/file/angeo-21-1383-2003.pdf |
id |
ftunivnantes:oai:HAL:hal-00317101v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:hal-00317101v1 2023-05-15T17:39:57+02:00 From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum Hofer, M. Y. Marsden, R. G. Sanderson, T. R. Tranquille, C. Research and Scientific Support Dept. of ESA Agence Spatiale Européenne = European Space Agency (ESA) 2003 https://hal.science/hal-00317101 https://hal.science/hal-00317101/document https://hal.science/hal-00317101/file/angeo-21-1383-2003.pdf en eng HAL CCSD European Geosciences Union hal-00317101 https://hal.science/hal-00317101 https://hal.science/hal-00317101/document https://hal.science/hal-00317101/file/angeo-21-1383-2003.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317101 Annales Geophysicae, 2003, 21 (6), pp.1383-1391 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2003 ftunivnantes 2023-01-25T00:21:43Z International audience Based on elemental abundance ratios derived from the Ulysses COSPIN/LET measurements, we classified the energetic particle populations during and after the socalled Fast Latitude Scan ? the time period during which the Ulysses spacecraft traveled from the highest heliolatitude south to maximum northern latitude, i.e. 27 November 2000 to 13 October 2001 ? as being mixed between solar energetic particles (major component) and particles accelerated at stream interaction regions. During the fast latitude scan, the Ulysses spacecraft made the first transit in heliolatitude from pole to pole during solar activity maximum conditions, providing a unique opportunity to acquire energetic particle composition data over a maximum range of heliolatitudes in the inner heliosphere. At low latitudes, based on our elemental abundance analysis, we found that while solar energetic particles dominated, there were indications for particle acceleration at single compression regions in a few instances. In the high heliolatitude range the observed elemental particle compositions are mainly of the solar energetic particle type. Within the statistical errors, the observed abundance ratios were independent of latitude, and were characteristic of solar energetic particles. These observations raise an important question for the theories of particle propagation in the inner heliosphere. The daily elemental abundance ratios of S/O, Mg/O and Si/O shown here are the first measured ratios at high heliolatitudes in the energy range from 13.0 to 30.0 MeV/n. Article in Journal/Newspaper North Pole Université de Nantes: HAL-UNIV-NANTES North Pole |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Hofer, M. Y. Marsden, R. G. Sanderson, T. R. Tranquille, C. From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Based on elemental abundance ratios derived from the Ulysses COSPIN/LET measurements, we classified the energetic particle populations during and after the socalled Fast Latitude Scan ? the time period during which the Ulysses spacecraft traveled from the highest heliolatitude south to maximum northern latitude, i.e. 27 November 2000 to 13 October 2001 ? as being mixed between solar energetic particles (major component) and particles accelerated at stream interaction regions. During the fast latitude scan, the Ulysses spacecraft made the first transit in heliolatitude from pole to pole during solar activity maximum conditions, providing a unique opportunity to acquire energetic particle composition data over a maximum range of heliolatitudes in the inner heliosphere. At low latitudes, based on our elemental abundance analysis, we found that while solar energetic particles dominated, there were indications for particle acceleration at single compression regions in a few instances. In the high heliolatitude range the observed elemental particle compositions are mainly of the solar energetic particle type. Within the statistical errors, the observed abundance ratios were independent of latitude, and were characteristic of solar energetic particles. These observations raise an important question for the theories of particle propagation in the inner heliosphere. The daily elemental abundance ratios of S/O, Mg/O and Si/O shown here are the first measured ratios at high heliolatitudes in the energy range from 13.0 to 30.0 MeV/n. |
author2 |
Research and Scientific Support Dept. of ESA Agence Spatiale Européenne = European Space Agency (ESA) |
format |
Article in Journal/Newspaper |
author |
Hofer, M. Y. Marsden, R. G. Sanderson, T. R. Tranquille, C. |
author_facet |
Hofer, M. Y. Marsden, R. G. Sanderson, T. R. Tranquille, C. |
author_sort |
Hofer, M. Y. |
title |
From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum |
title_short |
From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum |
title_full |
From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum |
title_fullStr |
From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum |
title_full_unstemmed |
From the Sun's south to the north pole ? Ulysses COSPIN/LET composition measurements at solar maximum |
title_sort |
from the sun's south to the north pole ? ulysses cospin/let composition measurements at solar maximum |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00317101 https://hal.science/hal-00317101/document https://hal.science/hal-00317101/file/angeo-21-1383-2003.pdf |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317101 Annales Geophysicae, 2003, 21 (6), pp.1383-1391 |
op_relation |
hal-00317101 https://hal.science/hal-00317101 https://hal.science/hal-00317101/document https://hal.science/hal-00317101/file/angeo-21-1383-2003.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766140706263400448 |