Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves
Jupiter has the most intense radiation belts of all the outer planets. It is not yet known how electrons can be accelerated to energies of 10 MeV or more. It has been suggested that cyclotron-resonant wave-particle interactions by chorus waves could accelerate electrons to a few MeV near the orbit o...
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ftmit:oai:dspace.mit.edu:1721.1/82924 2023-06-11T04:07:14+02:00 Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves Woodfield, E. E. Horne, R. B. Glauert, S. A. Menietti, J. D. Shprits, Yuri MIT Skoltech Initiative Shprits, Yuri 2013-08 application/pdf http://hdl.handle.net/1721.1/82924 en_US eng Copernicus GmbH http://dx.doi.org/10.5194/angeo-31-1619-2013 Annales Geophysicae 1432-0576 0992-7689 http://hdl.handle.net/1721.1/82924 Woodfield, E. E., R. B. Horne, S. A. Glauert, J. D. Menietti, and Y. Y. Shprits. “Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves.” Annales Geophysicae 31, no. 10 (October 2, 2013): 1619-1630. http://creativecommons.org/licenses/by/3.0/ Copernicus GmbH Article http://purl.org/eprint/type/JournalArticle 2013 ftmit https://doi.org/10.5194/angeo-31-1619-2013 2023-05-29T08:27:44Z Jupiter has the most intense radiation belts of all the outer planets. It is not yet known how electrons can be accelerated to energies of 10 MeV or more. It has been suggested that cyclotron-resonant wave-particle interactions by chorus waves could accelerate electrons to a few MeV near the orbit of Io. Here we use the chorus wave intensities observed by the Galileo spacecraft to calculate the changes in electron flux as a result of pitch angle and energy diffusion. We show that, when the bandwidth of the waves and its variation with L are taken into account, pitch angle and energy diffusion due to chorus waves is a factor of 8 larger at L-shells greater than 10 than previously shown. We have used the latitudinal wave intensity profile from Galileo data to model the time evolution of the electron flux using the British Antarctic Survey Radiation Belt (BAS) model. This profile confines intense chorus waves near the magnetic equator with a peak intensity at ∼5° latitude. Electron fluxes in the BAS model increase by an order of magnitude for energies around 3 MeV. Extending our results to L = 14 shows that cyclotron-resonant interactions with chorus waves are equally important for electron acceleration beyond L = 10. These results suggest that there is significant electron acceleration by cyclotron-resonant interactions at Jupiter contributing to the creation of Jupiter's radiation belts and also increasing the range of L-shells over which this mechanism should be considered. Article in Journal/Newspaper Antarc* Antarctic British Antarctic Survey DSpace@MIT (Massachusetts Institute of Technology) Antarctic Jupiter ENVELOPE(101.133,101.133,-66.117,-66.117) Annales Geophysicae 31 10 1619 1630 |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
description |
Jupiter has the most intense radiation belts of all the outer planets. It is not yet known how electrons can be accelerated to energies of 10 MeV or more. It has been suggested that cyclotron-resonant wave-particle interactions by chorus waves could accelerate electrons to a few MeV near the orbit of Io. Here we use the chorus wave intensities observed by the Galileo spacecraft to calculate the changes in electron flux as a result of pitch angle and energy diffusion. We show that, when the bandwidth of the waves and its variation with L are taken into account, pitch angle and energy diffusion due to chorus waves is a factor of 8 larger at L-shells greater than 10 than previously shown. We have used the latitudinal wave intensity profile from Galileo data to model the time evolution of the electron flux using the British Antarctic Survey Radiation Belt (BAS) model. This profile confines intense chorus waves near the magnetic equator with a peak intensity at ∼5° latitude. Electron fluxes in the BAS model increase by an order of magnitude for energies around 3 MeV. Extending our results to L = 14 shows that cyclotron-resonant interactions with chorus waves are equally important for electron acceleration beyond L = 10. These results suggest that there is significant electron acceleration by cyclotron-resonant interactions at Jupiter contributing to the creation of Jupiter's radiation belts and also increasing the range of L-shells over which this mechanism should be considered. |
author2 |
MIT Skoltech Initiative Shprits, Yuri |
format |
Article in Journal/Newspaper |
author |
Woodfield, E. E. Horne, R. B. Glauert, S. A. Menietti, J. D. Shprits, Yuri |
spellingShingle |
Woodfield, E. E. Horne, R. B. Glauert, S. A. Menietti, J. D. Shprits, Yuri Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
author_facet |
Woodfield, E. E. Horne, R. B. Glauert, S. A. Menietti, J. D. Shprits, Yuri |
author_sort |
Woodfield, E. E. |
title |
Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
title_short |
Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
title_full |
Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
title_fullStr |
Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
title_full_unstemmed |
Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
title_sort |
electron acceleration at jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves |
publisher |
Copernicus GmbH |
publishDate |
2013 |
url |
http://hdl.handle.net/1721.1/82924 |
long_lat |
ENVELOPE(101.133,101.133,-66.117,-66.117) |
geographic |
Antarctic Jupiter |
geographic_facet |
Antarctic Jupiter |
genre |
Antarc* Antarctic British Antarctic Survey |
genre_facet |
Antarc* Antarctic British Antarctic Survey |
op_source |
Copernicus GmbH |
op_relation |
http://dx.doi.org/10.5194/angeo-31-1619-2013 Annales Geophysicae 1432-0576 0992-7689 http://hdl.handle.net/1721.1/82924 Woodfield, E. E., R. B. Horne, S. A. Glauert, J. D. Menietti, and Y. Y. Shprits. “Electron acceleration at Jupiter: input from cyclotron-resonant interaction with whistler-mode chorus waves.” Annales Geophysicae 31, no. 10 (October 2, 2013): 1619-1630. |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.5194/angeo-31-1619-2013 |
container_title |
Annales Geophysicae |
container_volume |
31 |
container_issue |
10 |
container_start_page |
1619 |
op_container_end_page |
1630 |
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1768380183041015808 |