Examination of the lunar dynamo based on the magnetic anomalies

• Project/Area Number: 22540435
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: TSUNAKAWA Hideo 東京工業大学, 大学院・理工学研究科, 教授 (40163852)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 固体惑星 / 衛星 / 小惑星 / 磁気異常 / 月 / ダイナモ / 磁場 / かぐや

Research Abstract

We have obtained two major results in the present study.(1) We have developed a new method for mapping of three surface components of the magnetic field due to the lunar magnetic anomalies (Surface Vector Mapping; SVM). The SVM method has been applied to several regions and provided regional maps. Subsequently the SVM method has been used for global mapping of the lunar magnetic anomalies at the surface.(2) Using dipole approximation, we have analyzed spot-like magnetic anomalies of the Moon to estimate magnetization direction of the magnetic anomaly source. Virtual magnetic poles calculated from the magnetization direction suggest existence of the lunar core dynamo and reorientation of the lunar rotation axis.

Research Products

• [Journal Article] Constraint on the lunar core size from electromagnetic sounding based on magnetic field observations by an orbiting satellite (2013)
  • Author(s): Shimizu, Hisayoshi; Matsushima, Masaki; Takahashi, Futoshi; Shibuya, Hidetoshi; Tsunakawa, Hideo
  • Journal Title: ICARUS Volume: 222 Issue: 1 Pages: 32-43
  • DOI: 10.1016/j.icarus.2012.10.029
  • Peer Reviewed
• [Journal Article] Large-amplitude monochromatic ULF waves detected by Kaguya at the moon (2012)
  • Author(s): Nakagawa, T., A. Nakayama, F. Takahashi, H. Tsunakawa, H. Shibuya, H. Shimizu, and M. Matsushima
  • Journal Title: J. Geophys. Res. Volume: 117 Issue: A4
  • DOI: 10.1029/2011ja017249
  • Peer Reviewed
• [Journal Article] Statistical study of broad band whistler-mode waves detected by Kaguya near the Moon (2012)
  • Author(s): Tsugawa, Y.; Katoh, Y.; Terada, N.; Ono, T.; Tsunakawa, H.; Takahashi, F.; Shibuya, H.; Shimizu, H.; Matsushima, M.; Saito, Y.; Yokota, S.; Nishino, M. N.
  • Journal Title: GEOPHYSICAL RESEARCH LETTERS Volume: 39 Issue: 16
  • DOI: 10.1029/2012gl052818
  • Peer Reviewed
• [Journal Article] Control of lunar external magnetic enhancements by IMFpolarity: A case study (2012)
  • Author(s): Nishino, Masaki N.; Fujimoto, Masaki; Tsunakawa, Hideo; Matsushima, Masaki; Shibuya, Hidetoshi; Shimizu, Hisayoshi; Takahashi, Futoshi; Saito, Yoshifumi; Yokota, Shoichiro
  • Journal Title: PLANETARY AND SPACE SCIENCE Volume: 73 Issue: 1 Pages: 161-167
  • DOI: 10.1016/j.pss.2012.09.011
  • Peer Reviewed
• [Journal Article] Nongyrotropic electron velocity distribution functions near the lunar surface (2012)
  • Author(s): Harada, Y., S. Machida, Y. Saito, S. Yokota, K. Asamura, M. N. Nishino, H. Tsunakawa, H. Shibuya, F. Takahashi, M. Matsushima, H. Shimizu
  • Journal Title: J. Geophys. Res. Volume: 117 Issue: A7
  • DOI: 10.1029/2012ja017642
  • Peer Reviewed
• [Journal Article] Simultaneous Observation of the Electron Acceleration and Ion Deceleration over Lunar Magnetic Anomalies (2012)
  • Author(s): Y. Saito, M. N. Nishino, M. Fujimoto, T. Yamamoto, S. Yokota, H. Tsunakawa, H. Shibuya, M. Matsushima, H. Shimizu, F. Takahashi
  • Journal Title: Earth Planets and Space Volume: 64 Issue: 2 Pages: 83-92
  • DOI: 10.5047/eps.2011.07.011
  • NAID: 10030520173
  • Peer Reviewed
• [Journal Article] Anomalous deformation of the Earth's bow shock in the lunar wake: Joint measurement by Chang'E-1 and SELENE (2011)
  • Author(s): Nishino, M. N., T.Terasawa
  • Journal Title: Planet. Space Sci. Volume: 59 Issue: 5-6 Pages: 378-386
  • DOI: 10.1016/j.pss.2011.01.002
  • Peer Reviewed
• [Journal Article] Non-monochromatic whistler waves detected by Kaguya on the dayside surface of the moon (2011)
  • Author(s): Nakagawa, T., F. Takahashi, H. Tsunakawa, H. Shibuya, H. Shimizu, and M. Matsushima
  • Journal Title: Earth Planets Space Volume: 63(1) Issue: 1 Pages: 37-46
  • DOI: 10.5047/eps.2010.01.005
  • NAID: 10028225547
  • Peer Reviewed
• [Journal Article] Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya (2011)
  • Author(s): Tsugawa, Y., N. Terada, Y. Katoh, T. Ono, H. Tsunakawa, F. Takahashi, H. Shibuya, H. Shimizu, and M. Matsushima
  • Journal Title: Annales Geophysicae Volume: 29 Issue: 5 Pages: 889-893
  • DOI: 10.5194/angeo-29-889-2011
  • Peer Reviewed
• [Journal Article] Interaction between terrestrial plasma sheet electrons and the lunar surface: SELENE (Kaguya) observations (2010)
  • Author(s): Harada, Yuki; Machida, Shinobu; Saito, Yoshifumi; Yokota, Shoichiro; Asamura, Kazushi; Nishino, Masaki N.; Tanaka, Takaaki; Tsunakawa, Hideo; Shibuya, Hidetoshi; Takahashi, Futoshi; Matsushima, Masaki; Shimizu, Hisayoshi
  • Journal Title: GEOPHYSICAL RESEARCH LETTERS Volume: 37 Issue: 19
  • DOI: 10.1029/2010gl044574
  • NAID: 120002619575
  • Peer Reviewed
• [Journal Article] Effect of the solar wind proton entry into the deepest lunar wake (2010)
  • Author(s): Nishino, M. N.; Fujimoto, M.; Saito, Y.; Yokota, S.; Kasahara, Y.; Omura, Y.; Goto, Y.; Hashimoto, K.; Kumamoto, A.; Ono, T.; Tsunakawa, H.; Matsushima, M.;T akahashi, F.; Shibuya, H.; Shimizu, H.; Terasawa, T.
  • Journal Title: GEOPHYSICAL RESEARCH LETTERS Volume: 37 Issue: 12
  • DOI: 10.1029/2010gl043948
  • Peer Reviewed
• [Journal Article] Magnetic Cleanliness Program Under Control of Electromagnetic Compatibility for the SELENE (Kaguya) Spacecraft (2010)
  • Author(s): Matsushima, Masaki; Tsunakawa, Hideo; Iijima, Yu-ichi; Nakazawa, Satoru; Matsuoka, Ayako; Ikegami, Shingo; Ishikawa, Tomoaki; Shibuya, Hidetoshi; Shimizu, Hisayoshi; Takahashi, Futoshi
  • Journal Title: SPACE SCIENCE REVIEWS Volume: 154 Issue: 1-4 Pages: 253-264
  • DOI: 10.1007/s11214-010-9655-x
  • Peer Reviewed
• [Journal Article] Electrostatic Solitary Waves Associated with Magnetic Anomalies and Wake Boundary of the Moon Observed by KAGUYA (2010)
  • Author(s): K. Hashimoto, M. Hashitani, Y. Kasahara, (他10名)
  • Journal Title: Geophys. Res Lett Volume: 37 Issue: 19
  • DOI: 10.1029/2010gl044529
  • Peer Reviewed
• [Journal Article] In-flight Performance and Initial Results of Plasma Energy Angle and Composition Experiment (PACE) on SELENE (Kaguya) (2010)
  • Author(s): Saito, Yoshifumi; Yokota, Shoichiro; Asamura, Kazushi; Tanaka, Takaaki; Nishino, Masaki N.; Yamamoto, Tadateru; Terakawa, Yuta; Fujimoto, Masaki; Hasegawa, Hiroshi; Hayakawa, Hajime; Hirahara, Masafumi; Hoshino, Masahiro; Machida, Shinobu; Mukai, Toshifumi; Nagai, Tsugunobu; Nagatsuma, Tsutomu; Nakagawa, Tomoko; Nakamura, Masato; Oyama, Koh-ichiro; Sagawa, Eiichi; Sasaki, Susumu; Seki, Kanako; Shinohara, Iku; Terasawa, Toshio; Tsunakawa, Hideo; Shibuya, Hidetoshi; Matsushima, Masaki; Shimizu, Hisayoshi; Takahashi, Futoshi
  • Journal Title: SPACE SCIENCE REVIEWS Volume: 154 Issue: 1-4 Pages: 265-303
  • DOI: 10.1007/s11214-010-9647-x
  • Peer Reviewed
• [Journal Article] Lunar Magnetic Field Observation and Initial Global Mapping of Lunar Magnetic Anomalies by MAP-LMAG Onboard SELENE(Kaguya) (2010)
  • Author(s): Tsunakawa, Hideo; Shibuya, Hidetoshi; Takahashi, Futoshi; Shimizu,Hisayoshi; Matsushima, Masaki; Matsuoka, Ayako; Nakazawa, Satoru; Otake, Hisashi; Iijima, Yuichi
  • Journal Title: SPACE SCIENCE REVIEWS Volume: 154 Issue: 1-4 Pages: 219-251
  • DOI: 10.1007/s11214-010-9652-0
  • Peer Reviewed
• [Journal Article] Lunar magnetic field observation and initial global mapping of lunar magnetic anomalies by MAP-LMAG onboard SELENE (Kaguya) (2010)
  • Author(s): Tsunakawa, H., et al.
  • Journal Title: Space Sci.Rev. Volume: 154 Pages: 219-251
  • Peer Reviewed
• [Journal Article] In-flight performance and initial results of Plasma energy Angle and Composition Experiment (PACE) on SELENE (Kaguya) (2010)
  • Author(s): Saito, Y., et al. (including H.Tsunakawa)
  • Journal Title: Space Sci.Rev. Volume: 154 Pages: 265-303
  • Peer Reviewed
• [Journal Article] Magnetic cleanliness program under control of electromagnetic compatibility of the SELENE (Kaguya) spacecraft (2010)
  • Author(s): Matsushima, M., et al. (including H.Tsunakawa)
  • Journal Title: Space Sci.Rev. Volume: 154 Pages: 253-264
  • Peer Reviewed
• [Journal Article] Interaction between terrestrial plasma sheet electrons and the lunar surface : SELENE (Kaguya) observation (2010)
  • Author(s): Harada, Y., et al. (including H.Tsunakawa)
  • Journal Title: Geophys.Res.Lett. Volume: 37
  • NAID: 120002619575
  • Peer Reviewed
• [Journal Article] Electrostatic solitary waves associated with magnetic anomalies and wake boundary of the Moon observed by KAGUYA (2010)
  • Author(s): Hashimoto, K., et al. (including H.Tsunakawa)
  • Journal Title: Geophys.Res.Lett. Volume: 37
  • Peer Reviewed
• [Journal Article] Effect of the solar wind proton entry into the deepest lunar wake (2010)
  • Author(s): Nishino, M.N., et al. (including H.Tsunakawa)
  • Journal Title: Geophys.Res.Lett. Volume: 37
  • Peer Reviewed
• [Presentation] Solar wind control of lunar external magnetic enhancement: A case study (2012)
  • Author(s): Masaki N Nishino, Masaki Fujimoto, Hideo Tsunakawa, Hidetoshi Shibuya, Futoshi Takahashi, Hisayoshi Shimizu, Masaki Matsushima, Yoshifumi Saito
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2012-05-23
• [Presentation] 月周辺で観測される電子サイクロトロン高調波 (2012)
  • Author(s): 片山由美子,小嶋浩嗣,斎藤義文,笠原禎也,大村善治,山本忠輝,横田勝一郎,西野真木,橋本弘藏,小野高幸,綱川秀夫
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2012-05-23
• [Presentation] 月磁気異常のグローバル月面マッピング-月火成活動・月ダイナモ活動について (2012)
  • Author(s): 綱川秀夫,高橋太,清水久芳,渋谷秀敏,松島政貴
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2012-05-23
• [Presentation] かぐや衛星搭載磁力計で観測された階段状磁場変化解析から推定した月の電気伝導度 (2012)
  • Author(s): 比嘉哲也,吉村令慧,大志万直人,松島政貴,清水久芳,高橋太,渋谷秀敏,綱川秀夫
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2012-05-23
• [Presentation] プラズマシート電子を用いた月磁気異常の推定 (2012)
  • Author(s): 原田裕己,町田忍,斎藤義文,横田勝一郎,浅村和史,西野真木,綱川秀夫,渋谷秀敏,高橋太,松島政貴,清水久芳
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県).
  • Year and Date: 2012-05-23
• [Presentation] Kaguya 衛星によって月地殻磁気異常付近で観測された広帯域ホイッスラーモード波動 (2012)
  • Author(s): 津川靖基,寺田直樹,加藤雄人,小野高幸,綱川秀夫,高橋太,渋谷秀敏,清水久芳,松島政貴
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県).
  • Year and Date: 2012-05-23
• [Presentation] 太陽風プロトン月面散乱における散乱角依存性の研究 (2012)
  • Author(s): 上村洸太,斎藤義文,西野真木,横田勝一郎,浅村和史,綱川秀夫
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2012-05-23
• [Presentation] かぐやで観測された月周辺静電孤立波(ESW)の源の推定 (2012)
  • Author(s): 橋本弘藏,大村善治,笠原禎也,小嶋浩嗣,橋谷真紀,小野高幸,綱川秀夫
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2012-05-20
• [Presentation] Solar wind proton deceleration at higher altitude above lunar magnetic anomalies (2011)
  • Author(s): Nishino, M.N., et al.(including H.Tsunakawa)
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2011-12-09
• [Presentation] Global mapping of the magnetic field vector on the lunar surface originated from the lunar magnetic anomalies (2011)
  • Author(s): Tsunakawa, H., et al.
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2011-12-08
• [Presentation] An Estimation of Electrical Conductivity of the Moon Using Kaguya Magnetometer Data (2011)
  • Author(s): Shibuya, H., et al.(including H.Tsunakawa)
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2011-12-08
• [Presentation] 月磁気異常の広域および全球マッピング (2011)
  • Author(s): 綱川秀夫, 他
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 千葉県幕張メッセ
  • Year and Date: 2011-05-22
• [Presentation] Surface mapping of three components of the lunar magnetic anomaly field : Preliminary results (2010)
  • Author(s): Tsunakawa, H., et al.
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2010-12-16
• [Presentation] Basic properties of transformation remanent magnetization due to the Verwey transition of magnetite (2010)
  • Author(s): Sato, M., Mochizuki, N. , Tsunakawa, H.
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2010-12-16
• [Presentation] Preliminary global mapping of the lunar magnetic anomaly by MAP-LMAG onboard SELENE (Kaguya) (2010)
  • Author(s): Tsunakawa, H., et al.
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: 台北
  • Year and Date: 2010-06-22
• [Presentation] 月磁気異常のグローバル月面マッピング―月火成活動・月ダイナモ活動について
  • Author(s): 綱川秀夫
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
• [Presentation] Solar wind control of lunar external magnetic enhancement: A case study
  • Author(s): 西野 真木
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
• [Presentation] 周辺で観測される電子サイクロトロン高調波
  • Author(s): 片山 由美子
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
• [Presentation] かぐや衛星搭載磁力計で観測された階段状磁場変化解析から推定した月の電気伝導度
  • Author(s): 比嘉 哲也
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
• [Presentation] かぐやで観測された月周辺静電孤立波(ESW) の源の推定
  • Author(s): 橋本 弘藏
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)