Title :

Direct evidence of substorm-related impulsive injections of electrons at Mercury

Author(s) :

Aizawa, Sae [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Institute of Space and Astronautical Science [ISAS]
University of Pisa [Italy] = Università di Pisa [Italia] = Université de Pise [Italie] [UniPi]
Harada, Yuki [Auteur]
Kyoto University
André, Nicolas [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Saito, Yoshifumi [Auteur]
Institute of Space and Astronautical Science [ISAS]
Barabash, Stas [Auteur]
Swedish Institute of Space Physics [Kiruna] [IRF]
Delcourt, Dominique [Auteur]
Laboratoire de Physique des Plasmas [LPP]
Sauvaud, Jean-André [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Barthe, Alain [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Fedorov, Andréi [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Penou, Emmanuel [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Yokota, Shoichiro [Auteur]
Osaka University [Osaka]
Miyake, Wataru [Auteur]
Tokai University
Persson, Moa [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Nénon, Quentin [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Rojo, Mathias [Auteur]
Institut de recherche en astrophysique et planétologie [IRAP]
Futaana, Yoshifumi [Auteur]
Swedish Institute of Space Physics [Kiruna] [IRF]
Asamura, Kazushi [Auteur]
Institute of Space and Astronautical Science [ISAS]
Shimoyama, Manabu [Auteur]
Hadid, L. Z. [Auteur]
Laboratoire de Physique des Plasmas [LPP]
Fontaine, D. [Auteur]
Laboratoire de Physique des Plasmas [LPP]
Katra, Bruno [Auteur]
Laboratoire Paul Painlevé - UMR 8524 [LPP]
Fraenz, Markus [Auteur]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Krupp, Norbert [Auteur]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Matsuda, Shoya [Auteur]
Kanazawa University [KU]
Murakami, Go [Auteur]
Institute of Space and Astronautical Science [ISAS]

Journal title :

Nature Communications

Pages :

4019

Publisher :

Nature Publishing Group

Publication date :

2023

ISSN :

2041-1723

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Géophysique [physics.geo-ph]

English abstract : [en]

Mercury’s magnetosphere is known to involve fundamental processes releasing particles and energy like at Earth due to the solar wind interaction. The resulting cycle is however much faster and involves acceleration, ...
Show more >Mercury’s magnetosphere is known to involve fundamental processes releasing particles and energy like at Earth due to the solar wind interaction. The resulting cycle is however much faster and involves acceleration, transport, loss, and recycling of plasma. Direct experimental evidence for the roles of electrons during this cycle is however missing. Here we show that in-situ plasma observations obtained during BepiColombo’s first Mercury flyby reveal a compressed magnetosphere hosts of quasi-periodic fluctuations, including the original observation of dynamic phenomena in the post-midnight, southern magnetosphere. The energy-time dispersed electron enhancements support the occurrence of substorm-related, multiple, impulsive injections of electrons that ultimately precipitate onto its surface and induce X-ray fluorescence. These observations reveal that electron injections and subsequent energy-dependent drift now observed throughout Solar System is a universal mechanism that generates aurorae despite the differences in structure and dynamics of the planetary magnetospheres.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Laboratoire Paul Painlevé - UMR 8524

Source :

Harvested from HAL