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The Relationship between Solar Wind Charge Exchange Soft X-ray Emission and the Tangent Direction of Magnetopause in an XMM–Newton Event.pdf (2.17 MB)
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The Relationship between Solar Wind Charge Exchange Soft X-ray Emission and the Tangent Direction of Magnetopause in an XMM–Newton Event

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journal contribution
posted on 2023-05-25, 09:16 authored by Yingjie Zhang, Tianran Sun, Jennifer A Carter, Wenhao Liu, Steve Sembay, Li Ji, Chi Wang

With the advent of soft X-ray imaging enabling global magnetopause detection, it is critical to use reconstruction techniques to derive the 3-dimensional magnetopause location from 2-dimensional X-ray images. One of the important assumptions adopted by most techniques is that the direction with maximum soft X-ray emission is the tangent direction of the magnetopause, which has not been validated in observation so far. This paper analyzes a magnetospheric solar wind charge exchange (SWCX) soft X-ray event detected by XMM–Newton during relatively stable solar wind and geomagnetic conditions. The tangent direction of the magnetopause is determined by an empirical magnetopause model. Observation results show that the maximum SWCX soft X-ray intensity gradient tends to be the tangent of the magnetopause’s inner boundary, while the maximum SWCX soft X-ray intensity tends to be the tangent of the magnetopause’s outer boundary. Therefore, it is credible to use the assumption that the tangent direction of the magnetopause is the maximum SWCX soft X-ray intensity or its gradient when reconstructing the 3-dimensional magnetopause location. In addition, since these two maxima tend to be the inner and outer boundaries of the magnetopause, the thickness of magnetopause can also be revealed by soft X-ray imaging.

Funding

NNSFC grants 42188101 and 42074202

Strategic Pioneer Program on Space Science, CAS Grant nos. XDA15350201

Research Fund from the Chinese Academy of Sciences and the Specialized Research Fund for State Key Laboratories of China

Tianran Sun is also supported by the Young Elite Scientists Sponsorship Program (CAST - Y202045)

Jennifer A. Carter is supported by Royal Society grant DHF\R1\211068

History

Author affiliation

School of Physics & Astronomy, University of Leicester

Version

  • VoR (Version of Record)

Published in

Magnetochemistry

Volume

9

Issue

4

Pagination

88 - 88

Publisher

MDPI AG

eissn

2312-7481

Copyright date

2023

Available date

2023-05-25

Language

en