Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 43, issue 2
Articles | Volume 43, issue 2
https://doi.org/10.5194/angeo-43-417-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-43-417-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 43, issue 2
ANGEO Communicates
 | 
15 Jul 2025
ANGEO Communicates |  | 15 Jul 2025

Ion beam instability model for Mercury's upstream waves

Yasuhito Narita, Daniel Schmid, and Uwe Motschmann

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Short summary
It is often the case that only magnetic field data are available for in situ planetary studies using spacecraft. Either plasma data are not available or the data resolution is limited. Nevertheless, the theory of plasma instability tells us how to interpret the magnetic field data (wave frequency) in terms of flow speed and beam velocity, generating the instability. We invent an analysis tool for Mercury's upstream waves as an example.
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