EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Using X-ray imaging to find the magnetopause location

Andrey Samsonov1, Steven Sembay2, Jennifer Carter2, Graziella Branduardi-Raymont1, and Andrew Read2
Andrey Samsonov et al.
  • 1Mullard Space Science Laboratory, University College London, United Kingdom (
  • 2Leicester University, Leicester, United Kingdom

The process of charge exchange between solar wind highly charged heavy ions and exospheric neutrals produces soft X-rays in geospace. The regions with the strongest emissivity are the magnetosheath and cusps. The Soft X-ray Imager (SXI) on board the forthcoming SMILE mission will measure X-ray emissivity integrated along the line-of-sight. By analyzing 2-D maps of X-ray counts from the SXI, we can extract information about magnetopause shape and position. It has been suggested that the maximum of integrated emissivity is tangent to the magnetopause. We check this assumption using the results of MHD simulations for different points along the SMILE trajectory. We show that this method can be used for finding the magnetopause location if some corrections are applied. We present methods of determining the location of the maximum of integrated emissivity using SXI counts maps for a moderately and strongly compressed magnetosphere.

How to cite: Samsonov, A., Sembay, S., Carter, J., Branduardi-Raymont, G., and Read, A.: Using X-ray imaging to find the magnetopause location, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-9036,, 2022.

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