Temporal and Spectral Studies by XMM-Newton of Jupiter's X-ray Auroras During a Compression Event

[en] 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-hr (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 light curves to show that, following the compression event, the X-ray auroras exhibited a recurring 23- to 27-min periodicity that lasted over 12.5 hr (longer than a Jupiter rotation). This periodicity was observed from both the northern and southern auroras, suggesting that the emission from both poles was caused by a shared driver. The soft X-ray component of the auroras is due to charge exchange processes between precipitating ions and neutrals in Jupiter's atmosphere. We utilized 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. ©2020. The Authors.

Centre/Unité de recherche :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Aérospatiale, astronomie & astrophysique

Auteur, co-auteur :

Wibisono, A. D.; Mullard Space Science Laboratory, Department of Space & Climate Physics, University College London, London, United Kingdom, The Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom

Branduardi-Raymont, G.; Mullard Space Science Laboratory, Department of Space & Climate Physics, University College London, London, United Kingdom, The Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom

Dunn, W. R.; Mullard Space Science Laboratory, Department of Space & Climate Physics, University College London, London, United Kingdom, The Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom, Smithsonian Astrophysical Observatory, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States

Coates, A. J.; Mullard Space Science Laboratory, Department of Space & Climate Physics, University College London, London, United Kingdom, The Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom

Weigt, D. M.; Department of Physics and Astronomy, University of Southampton, Southampton, United Kingdom

Jackman, C. M.; Department of Physics and Astronomy, University of Southampton, Southampton, United Kingdom, Dublin Institute for Advanced Studies, Dublin, Ireland

Yao, Zhonghua ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Tao, C.; National Institute of Information and Communications Technology, Koganei, Japan

Allegrini, F.; Southwest Research Institute, San Antonio, TX, United States, University of Texas at San Antonio, San Antonio, TX, United States

Grodent, Denis ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Plus d'auteurs (9 en +)

Langue du document :

Anglais

Titre :

Temporal and Spectral Studies by XMM-Newton of Jupiter's X-ray Auroras During a Compression Event

Date de publication/diffusion :

2020

Titre du périodique :

Journal of Geophysical Research. Space Physics

ISSN :

2169-9380

eISSN :

2169-9402

Maison d'édition :

Blackwell Publishing Ltd

Volume/Tome :

125

Fascicule/Saison :

Peer reviewed :

Peer reviewed vérifié par ORBi

URL complémentaire :

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JA027676

Organisme subsidiant :

STSCI - Space Telescope Science Institute
NASA - National Aeronautics and Space Administration
BELSPO - Belgian Science Policy Office
UCL - University College London
JSPS - Japan Society for the Promotion of Science
SFI - Science Foundation Ireland
ESA - European Space Agency
Chinese Academy of Sciences
SFTC - Science and Technology Facilities Council

Disponible sur ORBi :

depuis le 19 novembre 2020

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