EGU2020-1809
https://doi.org/10.5194/egusphere-egu2020-1809
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.Lower hybrid waves at the magnetosheath separatrix region
- 1National Space Science Center, CAS, National Space Science Center, CAS, Beijing, China (bbtang@spaceweather.ac.cn)
- 2Swedish Institute of Space Physics, Uppsala, Sweden
- *A full list of authors appears at the end of the abstract
Lower hybrid waves are investigated at the magnetosheath separatrix region in asymmetric guide-field reconnection at Earth’s magnetopause by using MMS observations. These waves are found in a limited region, depending on the density gradient across the separatrix, and they are driven by the lower hybrid drift instability. Properties of these waves are presented: (1) the waves propagate towards the x-line due to the out-of-plane magnetic field, consistent with the electron drift direction; (2) the wave potential is about 20% of the electron temperature. These drift waves effectively produce cross-field particle diffusion, enabling the entry of magnetosheath electrons into the exhaust region.
MMS team:
B. L. Giles, P. -A. Lindqvist, R. E. Ergun, C. T. Russell, and J. L. Burch
How to cite: Tang, B., Li, W., Graham, D., Wang, C., and Khotyaintsev, Y. and the MMS team: Lower hybrid waves at the magnetosheath separatrix region, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-1809, https://doi.org/10.5194/egusphere-egu2020-1809, 2019