Magnetospheric interactions of Saturn's moon Dione (2005‐2015)
The moon Dione orbits Saturn at 6.2 Saturn radii $R_S$ deep in the Kronian magnetosphere. In‐situ studies of the moon‐magnetosphere interaction processes near Dione were possible with the Cassini/Huygens mission which flew by close to Dione five times at distances between 99 km and 516 km. In additi...
Main Authors: | , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union (AGU)
2020
|
Subjects: | |
Online Access: | https://discovery.ucl.ac.uk/id/eprint/10099084/1/Jones_2019JA027688.pdf https://discovery.ucl.ac.uk/id/eprint/10099084/ |
id |
ftucl:oai:eprints.ucl.ac.uk.OAI2:10099084 |
---|---|
record_format |
openpolar |
spelling |
ftucl:oai:eprints.ucl.ac.uk.OAI2:10099084 2023-12-24T10:23:27+01:00 Magnetospheric interactions of Saturn's moon Dione (2005‐2015) Krupp, N Kotova, A Roussos, E Simon, S Liuzzo, L Paranicas, C Khurana, K Jones, GH 2020-06 text https://discovery.ucl.ac.uk/id/eprint/10099084/1/Jones_2019JA027688.pdf https://discovery.ucl.ac.uk/id/eprint/10099084/ eng eng American Geophysical Union (AGU) https://discovery.ucl.ac.uk/id/eprint/10099084/1/Jones_2019JA027688.pdf https://discovery.ucl.ac.uk/id/eprint/10099084/ open Journal of Geophysical Research: Space Physics , 125 (6) , Article e2019JA027688. (2020) outer planets Dione moon‐magnetosphere interaction Article 2020 ftucl 2023-11-27T13:07:39Z The moon Dione orbits Saturn at 6.2 Saturn radii $R_S$ deep in the Kronian magnetosphere. In‐situ studies of the moon‐magnetosphere interaction processes near Dione were possible with the Cassini/Huygens mission which flew by close to Dione five times at distances between 99 km and 516 km. In addition, Cassini crossed Dione’s L‐shell more than 400 times between 2004 and 2017 and documented the variability of Saturn’s magnetosphere. Different flyby geometries allowed to study the interaction processes upstream, in the low‐energy wake, and above the north pole of Dione. We describe here the energetic particle measurements from the Low Energy Magnetospheric Measurement System LEMMS, part of the Magnetosphere Imaging Instrument MIMI onboard Cassini. We also use hybrid simulation results from "A.I.K.E.F." to interpret the signatures in the particle fluxes. This paper is a continuation of Krupp et al. (2013) and Kotova et al. (2015). The key results are: (1) Saturn’s magnetosphere at Dione's orbit is highly variable with changes in energetic charged particle fluxes by 1‐2 orders of magnitude. (2) The dropout signatures near Dione are basically consistent with a fully absorbing obstacle but some features point to more complex interaction processes than plasma and energetic particle absorption; (3) Absorption signatures are found to be asymmetric with respect to the orientation of the moon, indicative of the presence of radial drift components for electrons; (4) The deepest absorption signatures were observed at the edge of the low‐energy wake pointing to gradient‐B drifts strongest in that part of the interaction region. Article in Journal/Newspaper North Pole University College London: UCL Discovery North Pole Kotova ENVELOPE(36.742,36.742,64.690,64.690) |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
outer planets Dione moon‐magnetosphere interaction |
spellingShingle |
outer planets Dione moon‐magnetosphere interaction Krupp, N Kotova, A Roussos, E Simon, S Liuzzo, L Paranicas, C Khurana, K Jones, GH Magnetospheric interactions of Saturn's moon Dione (2005‐2015) |
topic_facet |
outer planets Dione moon‐magnetosphere interaction |
description |
The moon Dione orbits Saturn at 6.2 Saturn radii $R_S$ deep in the Kronian magnetosphere. In‐situ studies of the moon‐magnetosphere interaction processes near Dione were possible with the Cassini/Huygens mission which flew by close to Dione five times at distances between 99 km and 516 km. In addition, Cassini crossed Dione’s L‐shell more than 400 times between 2004 and 2017 and documented the variability of Saturn’s magnetosphere. Different flyby geometries allowed to study the interaction processes upstream, in the low‐energy wake, and above the north pole of Dione. We describe here the energetic particle measurements from the Low Energy Magnetospheric Measurement System LEMMS, part of the Magnetosphere Imaging Instrument MIMI onboard Cassini. We also use hybrid simulation results from "A.I.K.E.F." to interpret the signatures in the particle fluxes. This paper is a continuation of Krupp et al. (2013) and Kotova et al. (2015). The key results are: (1) Saturn’s magnetosphere at Dione's orbit is highly variable with changes in energetic charged particle fluxes by 1‐2 orders of magnitude. (2) The dropout signatures near Dione are basically consistent with a fully absorbing obstacle but some features point to more complex interaction processes than plasma and energetic particle absorption; (3) Absorption signatures are found to be asymmetric with respect to the orientation of the moon, indicative of the presence of radial drift components for electrons; (4) The deepest absorption signatures were observed at the edge of the low‐energy wake pointing to gradient‐B drifts strongest in that part of the interaction region. |
format |
Article in Journal/Newspaper |
author |
Krupp, N Kotova, A Roussos, E Simon, S Liuzzo, L Paranicas, C Khurana, K Jones, GH |
author_facet |
Krupp, N Kotova, A Roussos, E Simon, S Liuzzo, L Paranicas, C Khurana, K Jones, GH |
author_sort |
Krupp, N |
title |
Magnetospheric interactions of Saturn's moon Dione (2005‐2015) |
title_short |
Magnetospheric interactions of Saturn's moon Dione (2005‐2015) |
title_full |
Magnetospheric interactions of Saturn's moon Dione (2005‐2015) |
title_fullStr |
Magnetospheric interactions of Saturn's moon Dione (2005‐2015) |
title_full_unstemmed |
Magnetospheric interactions of Saturn's moon Dione (2005‐2015) |
title_sort |
magnetospheric interactions of saturn's moon dione (2005‐2015) |
publisher |
American Geophysical Union (AGU) |
publishDate |
2020 |
url |
https://discovery.ucl.ac.uk/id/eprint/10099084/1/Jones_2019JA027688.pdf https://discovery.ucl.ac.uk/id/eprint/10099084/ |
long_lat |
ENVELOPE(36.742,36.742,64.690,64.690) |
geographic |
North Pole Kotova |
geographic_facet |
North Pole Kotova |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
Journal of Geophysical Research: Space Physics , 125 (6) , Article e2019JA027688. (2020) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10099084/1/Jones_2019JA027688.pdf https://discovery.ucl.ac.uk/id/eprint/10099084/ |
op_rights |
open |
_version_ |
1786197444715872256 |