HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Mass-loading, pile-up, and mirror-mode waves at comet 67P/Churyumov-Gerasimenko

Abstract : The data from all Rosetta plasma consortium instruments and from the ROSINA COPS instrument are used to study the interaction of the solar wind with the outgassing cometary nucleus of 67P/Churyumov-Gerasimenko. During 6 and 7 June 2015, the interaction was first dominated by an increase in the solar wind dynamic pressure, caused by a higher solar wind ion density. This pressure compressed the draped magnetic field around the comet, and the increase in solar wind electrons enhanced the ionization of the outflow gas through collisional ionization. The new ions are picked up by the solar wind magnetic field, and create a ring/ring-beam distribution, which, in a high-β plasma, is unstable for mirror mode wave generation. Two different kinds of mirror modes are observed: one of small size generated by locally ionized water and one of large size generated by ionization and pickup farther away from the comet.
Document type :
Journal articles
Complete list of metadata

Cited literature [49 references]  Display  Hide  Download

Contributor : Nathalie Rouchon Connect in order to contact the contributor
Submitted on : Tuesday, May 24, 2016 - 10:25:59 AM
Last modification on : Monday, May 16, 2022 - 8:20:22 AM


Publisher files allowed on an open archive



M. Volwerk, Ingo Richter, B. Tsurutani, C. Götz, Kathrin Altwegg, et al.. Mass-loading, pile-up, and mirror-mode waves at comet 67P/Churyumov-Gerasimenko. Annales Geophysicae, European Geosciences Union, 2016, 34, pp.1-15. ⟨10.5194/angeo-34-1-2016⟩. ⟨insu-01320578⟩



Record views


Files downloads