Reconstruction of space plasma structures in four-dimensional spacetime from multi-spacecraft observations
| Project/Area Number |
24740337
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Japan Aerospace Exploration Agency |
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Principal Investigator |
HASEGAWA Hiroshi 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (50435799)
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| Research Collaborator |
BENGT Sonnerup 米国ダートマス大学, セイヤー工学部, 名誉教授
NAKAMURA Takuma オーストリア科学アカデミー, 宇宙科学研究所, 研究員
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 衛星観測 / 地球・惑星磁気圏 / 磁気リコネクション / 宇宙プラズマ / データ解析手法 / 磁気圏界面 / 磁気フラックスロープ / 時空間構造 / 電子流体 / 磁場散逸 / 電子拡散領域 / 境界値問題 / 初期値問題 / 編隊観測 / 複数衛星 / 磁気静水圧平衡 / 電磁流体力学 / コロナ質量放出 / 国際情報交換 / アメリカ合衆国 / 地球惑星磁気圏 / 宇宙空間 / 太陽圏 |
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| Outline of Final Research Achievements |
The objective of our research is to develop novel data analysis techniques for the reconstruction of space plasma structures in four-dimensional spacetime from multi-spacecraft measurements. We successfully developed methods for accurately reconstructing temporal evolution of two-dimensional (2-D) structures, for reconstructing three-dimensional (3-D) magnetic field and plasma structures from two-spacecraft measurements, for reconstructing the electron diffusion region in 2-D magnetic reconnection, etc. One of the methods, the 3-D reconstruction method, was successfully applied to THEMIS spacecraft observations of Earth's magnetopause. We found that a magnetic flux rope generated by magnetopause reconnection has a significant 3-D structure, suggesting the operation of 3-D reconnection. We are now almost ready for the analysis of high spatio-temporal resolution data to be taken by NASA's four-spacecraft Magnetospheric Multiscale (MMS) mission, successfully launched on 12 March 2015.
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Report
(4 results)
Research Products
(55 results)
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[Journal Article] Asymmetry of magnetosheath flows and magnetopause shape during low Alfvén Mach number solar wind2013
Author(s)
Lavraud, B., E. Larroque, E. Budnik, V. Genot, J. E. Borovsky, M. W. Dunlop, C. Foullon, H. Hasegawa, C. Jacquey, K. Nykyri, A. Ruffenach, M. G. G. T. Taylor, I. Dandouras, and H. Reme
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Journal Title
J. Geophys. Res. Space Physics
Volume: 118
Issue: 3
Pages: 1-12
DOI
Related Report
Peer Reviewed
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[Journal Article] Electron acceleration to relativistic energies at a strong quasi-parallel shock wave2013
Author(s)
Masters, A., L. Stawarz, M. Fujimoto, S. J. Schwartz, N. Sergis, M. F. Thomsen, A. Retino, H. Hasegawa, B. Zieger, G. R. Lewis, A. J. Coates, P. Canu, and M. K. Dougherty
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Journal Title
Nature Physics
Volume: 9
Issue: 3
Pages: 164-167
DOI
Related Report
Peer Reviewed
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