EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Identifying the zoo of waves in Magnetosheathjets using MMS burst data

Eva Krämer1, Maria Hamrin1, Herbert Gunell1, Tomas Karlsson2, Konrad Steinvall3, Oleksandr Goncharov4, and Mats André3
Eva Krämer et al.
  • 1Umeå University, Department of Physics, Umeå, Sweden
  • 2Division of Space and Plasma Physics, KTH Royal Institute of Technology, Stockholm, Sweden
  • 3Swedish Institute of Space Physics, Uppsala, Sweden
  • 4Charles University, Faculty of Mathematics and Physics, 180 00 Prague 8, Czech Republic

The magnetosheath is a region downstream of the bow shock filled with turbulent, decelerated solar wind plasma which is flowing earthwards. This solar wind flow sometimes shows signatures of localized structures with enhanced dynamic pressure, so called magnetosheath jets. These jets are often  associated with low angles between the bow shock normal and the interplanetary magnetic field (IMF) direction, the so called quasi-parallel bow shock. Less often they are also found behind the quasi-perpendicular bow shock.

As jets propagate through the magnetosheath, they interact with the surrounding plasma. Studying waves inside, and in the vicinity of, jets is a step towards understanding the interaction of jets with the surrounding plasma. So far whistler waves, electrostatic waves, waves in the lower hybrid frequency range as well as low frequency waves have been reported. However, the sources of these waves are unknown. In addition, further types of waves may be associated with the jets.

We conduct a study on waves in magnetosheath jets using burst mode data of the Magnetospheric Multiscale (MMS) mission. The magnetic and electric field data are provided with a sampling rate of 8 kHz, while previous studies used data sets with much lower sampling rates. The high time resolution allows us to study different waves over a large frequency range and investigate properties of these waves. In addition, we discuss possible generation mechanisms.

How to cite: Krämer, E., Hamrin, M., Gunell, H., Karlsson, T., Steinvall, K., Goncharov, O., and André, M.: Identifying the zoo of waves in Magnetosheathjets using MMS burst data, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-550,, 2023.