Asymmetries in the Earth's dayside magnetosheath: results from global hybrid-Vlasov simulations

Turc, Lucile; Tarvus, Vertti; Dimmock, Andrew P.; Battarbee, Markus; Ganse, Urs; Johlander, Andreas; Grandin, Maxime; Pfau-Kempf, Yann; Dubart, Maxime; Palmroth, Minna

doi:https://doi.org/10.5194/angeo-38-1045-2020

Articles | Volume 38, issue 5

https://doi.org/10.5194/angeo-38-1045-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/angeo-38-1045-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 38, issue 5

Regular paper

|

06 Oct 2020

Regular paper |

| 06 Oct 2020

Asymmetries in the Earth's dayside magnetosheath: results from global hybrid-Vlasov simulations

Lucile Turc, Vertti Tarvus, Andrew P. Dimmock, Markus Battarbee, Urs Ganse, Andreas Johlander, Maxime Grandin, Yann Pfau-Kempf, Maxime Dubart, and Minna Palmroth

Model code and software

Vlasiator: hybrid-Vlasov simulation code M. Palmroth and the Vlasiator team https://doi.org/10.5281/zenodo.3640593

Vlasiator M. Palmroth https://www.helsinki.fi/en/researchgroups/vlasiator/

VLSV: file format and tools A. Sandroos https://github.com/fmihpc/vlsv/

Analysator: python analysis toolkit O. Hannuksela and the Vlasiator team https://github.com/fmihpc/analysator/

Short summary

Using global computer simulations, we study properties of the magnetosheath, the region of near-Earth space where the stream of particles originating from the Sun, the solar wind, is slowed down and deflected around the Earth's magnetic field. One of our main findings is that even for idealised solar wind conditions as used in our model, the magnetosheath density shows large-scale spatial and temporal variation in the so-called quasi-parallel magnetosheath, causing varying levels of asymmetry.