Small-scale magnetic fields on the lunar surface inferred from plasma sheet electrons

Yuki Harada, Shinobu Machida, Yoshifumi Saito, Shoichiro Yokota, Kazushi Asamura, Masaki N. Nishino, Hideo Tsunakawa, Hidetoshi Shibuya, Futoshi Takahashi, Masaki Matsushima, Hisayoshi Shimizu

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

The origins of the lunar crustal magnetic fields remain unclear although dozens of magnetic field measurements have been conducted on and above the lunar surface. A major obstacle to resolving this problem is the extreme difficulty of determining a surface distribution of small-scale magnetization. We present a new technique to map small-scale magnetic fields using nonadiabatic scattering of high-energy electrons in the terrestrial plasma sheet. Particle tracing, utilizing three-dimensional lunar magnetic field data synthesized from magnetometer measurements, enables us to separate the contributions to electron motion of small- and large-scale magnetic fields. We map significant kilometer-scale magnetic fields on the southwestern side of the South Pole-Aitken basin that are correlated with larger-scale magnetization. This implies that kilometer-scale magnetization may be ubiquitous over the lunar surface and related to the large-scale magnetization. Key Points Lunar small-scale magnetization can be inferred from plasma sheet electrons Strong small-scale magnetization is related to large-scale magnetization Small-scale magnetization may be ubiquitous over the lunar surface

本文言語英語
ページ(範囲)3362-3366
ページ数5
ジャーナルGeophysical Research Letters
40
13
DOI
出版ステータス出版済み - 7 16 2013
外部発表はい

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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