Wibisono, AD;
Branduardi-Raymont, G;
Dunn, WR;
Coates, AJ;
Weigt, DM;
Jackman, CM;
Yao, ZH;
... Fleming, D; + view all
(2020)
Temporal and Spectral Studies by XMM-Newton of Jupiter's X-ray Auroras During a Compression Event.
Journal of Geophysical Research: Space Physics
, 125
(5)
, Article e2019JA027676. 10.1029/2019ja027676.
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Abstract
We report the temporal and spectral results of the first XMM‐Newton observation of Jupiter's X‐ray auroras during a clear magnetospheric compression event on June 2017 as confirmed by data from the Jovian Auroral Distributions Experiment (JADE) instrument onboard Juno. The northern and southern auroras were visible twice and thrice respectively as they rotated in and out of view during the ~23‐hour (almost 2.5 Jupiter rotations) long XMM‐Newton jovian observing campaign. Previous auroral observations by Chandra and XMM‐Newton have shown that the X‐ray auroras sometimes pulse with a regular period. We applied wavelet and Fast Fourier Transforms (FFTs) on the auroral lightcurves to show that, following the compression event, the X‐ray auroras exhibited a recurring 23‐27 minute periodicity that lasted over 12.5 hours (longer than a Jupiter rotation). This periodicity was observed from both the northern and southern auroras, suggesting that the emission from both poles were caused by a shared driver. The soft X‐rays component of the auroras are due to charge exchange processes between precipitating ions and neutrals in Jupiter's atmosphere. We utilised the Atomic Charge Exchange (ACX) spectral package to produce solar wind and iogenic plasma models to fit the auroral spectra in order to identify the origins of these ions. For this observation the iogenic model gave the best fit which suggests that the precipitating ions are from iogenic plasma in Jupiter's magnetosphere.
| Type: | Article |
|---|---|
| Title: | Temporal and Spectral Studies by XMM-Newton of Jupiter's X-ray Auroras During a Compression Event |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2019ja027676 |
| Publisher version: | https://doi.org/10.1029/2019ja027676 |
| Language: | English |
| Additional information: | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10094863 |
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