Halley彗星最接近時のSakigake/IMFによる惑星間空間磁場変動特性について  [in Japanese] Characteristics of IMF Structures Observed by Sakigake at the Closest Approach to Comet Halley  [in Japanese]

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Author(s)

Abstract

「さきがけ」のHalley彗星最接近時(1986年3月11日)における惑星間空間磁場構造について, 磁場不連続現象という観点から調べられた。「さきがけ」はこの日, 太陽磁気圏のneutral sheetをmultiple crossingし, さらに(1)tangential不連続とneither不連続が異常に多く, 磁場強度変動の卓越する領域と(2)rotational不連続が多く磁場強度変化の少ない, IMF磁場の強い領域とを横切っていた。この物理的解釈には, solar plasmasheetあるいはmagnetic cloudという描像が考えられる。

Characteristics of interplanetary magnetic structures are investigated using the IMF data obtained by Sakigake on 11 March 1986 at its closest approach to comet Halley. IMF variations associated with multiple crossings of heliospheric neutral sheet can be detected on the same day. It is also found that two peculiar regions with (1) anomalously many tangential and neither, discontinuities, and with (2) predominant rotational discontinuities existed near the neutral sheet at cometary distance of 7×10^6 km. The magnetic field is found to be weak and to change easily its strength in the former region, while to be steady and strong in the latter. Further studies are needed to clarify whether the structure indicates the solar plasmasheet or the magnetic cloud.

Journal

  • 宇宙科学研究所報告

    宇宙科学研究所報告 (49), p1-8, 1987-03

    Japan Aerospace Exploration Agency

Codes

  • NII Article ID (NAID)
    110000222496
  • NII NACSIS-CAT ID (NCID)
    AN00354474
  • Text Lang
    JPN
  • ISSN
    02852853
  • NDL Article ID
    3126907
  • NDL Source Classification
    MB0(宇宙科学)
  • NDL Source Classification
    ZM33(科学技術--宇宙科学)
  • NDL Call No.
    Z15-409
  • Data Source
    NDL  NII-ELS 
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