Examination of the lunar dynamo based on the magnetic anomalies

基于磁异常的月球发电机检查

• 批准号: 22540435
• 负责人: TSUNAKAWA Hideo
• 金额: $ 2.83万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22540435/
• 关键词: 固体惑星; 衛星; 小惑星; 磁気異常; 月; ダイナモ; 磁場; かぐや

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.

我们在本研究中获得了两个主要结果。(1)我们已经开发了一种新的方法，由于月球磁异常（表面矢量映射; SVM）的磁场的三个表面分量的映射。支持向量机方法已被应用到几个地区，并提供了区域地图。随后，支持向量机方法已被用于月球表面磁异常的全球映射。(2)利用偶极近似，分析了月球的点状磁异常，估计了磁异常源的磁化方向。从磁化方向计算的虚拟磁极表明月球核心发电机的存在和月球旋转轴的重新定位。

项目成果

Electrostatic solitary waves associated with magnetic anomalies and wake boundary of the Moon observed by KAGUYA

• DOI: 10.1029/2010gl044529
• 发表时间: 2010-10
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: K. Hashimoto;M. Hashitani;Y. Kasahara;Y. Omura;M. Nishino;Y. Saito;S. Yokota;T. Ono;H. Tsunakawa;H. Shibuya;M. Matsushima;H. Shimizu;F. Takahashi

Interaction between terrestrial plasma sheet electrons and the lunar surface : SELENE (Kaguya) observation

地球等离子体片电子与月球表面的相互作用：SELENE（Kaguya）观测

• 发表时间: 2010
• 期刊: Geophys.Res.Lett.
• 作者: Harada;Y.;et al. (including H.Tsunakawa)
• 通讯作者: et al. (including H.Tsunakawa)

Surface mapping of three components of the lunar magnetic anomaly field : Preliminary results

月球磁异常场三个分量的表面测绘：初步结果

• 发表时间: 2010
• 作者: Tsunakawa;H.;et al.
• 通讯作者: et al.

周辺で観測される電子サイクロトロン高調波

在周围区域观察到的电子回旋谐波

• 作者: Iwata;T.;K. Matsumoto;Y. Ishihara;F. Kikuchi;Y. Harada and S. Sasaki;片山 由美子
• 通讯作者: 片山 由美子

An Estimation of Electrical Conductivity of the Moon Using Kaguya Magnetometer Data

使用 Kaguya 磁力计数据估算月球的电导率

• 发表时间: 2011
• 作者: Shibuya;H.;et al.(including H.Tsunakawa)
• 通讯作者: et al.(including H.Tsunakawa)