Articles | Volume 39, issue 4
Ann. Geophys., 39, 721–742, 2021
https://doi.org/10.5194/angeo-39-721-2021
Ann. Geophys., 39, 721–742, 2021
https://doi.org/10.5194/angeo-39-721-2021

Regular paper 29 Jul 2021

Regular paper | 29 Jul 2021

Steepening of magnetosonic waves in the inner coma of comet 67P/Churyumov–Gerasimenko

Katharina Ostaszewski et al.

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Plasma waves are an integral part of cometary physics, as they facilitate the transfer of energy and momentum. From intermediate to strong activity, nonlinear asymmetric plasma and magnetic field enhancements dominate the inner coma of 67P/CG. We present a statistical survey of these structures from December 2014 to June 2016, facilitated by Rosetta's unprecedented long mission duration. Using a 1D MHD model, we show they can be described as a combination of nonlinear and dissipative effects.