月球表面磁场及其与太阳风的相互作用：月球勘探者号的探测结果

Lunar surface magnetic fields and their interaction with the solar wind: results from lunar prospector.

作者信息

Lin RP, Mitchell DL, Curtis DW, Anderson KA, Carlson CW, McFadden J, Acuna MH, Hood LL, Binder A

机构信息

R. P. Lin, Space Sciences Laboratory and Physics Department, University of California, Berkeley, CA 94720, USA. D. L. Mitchell, D. W. Curtis, K. A. Anderson, C. W. Carlson, J. McFadden, Space Sciences Laboratory, University of California,

出版信息

Science. 1998 Sep 4;281(5382):1480-4. doi: 10.1126/science.281.5382.1480.

DOI:10.1126/science.281.5382.1480

PMID:9727969

Abstract

The magnetometer and electron reflectometer experiment on the Lunar Prospector spacecraft has obtained maps of lunar crustal magnetic fields and observed the interaction between the solar wind and regions of strong crustal magnetic fields at high selenographic latitude (30 degreesS to 80 degreesS) and low ( approximately 100 kilometers) altitude. Electron reflection maps of the regions antipodal to the Imbrium and Serenitatis impact basins, extending to 80 degreesS latitude, show that crustal magnetic fields fill most of the antipodal zones of those basins. This finding provides further evidence for the hypothesis that basin-forming impacts result in magnetization of the lunar crust at their antipodes. The crustal magnetic fields of the Imbrium antipode region are strong enough to deflect the solar wind and form a miniature (100 to several hundred kilometers across) magnetosphere, magnetosheath, and bow shock system.

摘要

月球勘探者号航天器上的磁力计和电子反射计实验获得了月球地壳磁场图，并观测了太阳风与高月面纬度（南纬30度至80度）和低海拔（约100千米）处强地壳磁场区域之间的相互作用。延伸至南纬80度的雨海和澄海撞击盆地对映区域的电子反射图表明，地壳磁场占据了这些盆地大部分对映区域。这一发现为盆地形成撞击导致其对映点处月球地壳磁化这一假说提供了进一步证据。雨海对映区域的地壳磁场强度足以使太阳风发生偏转，并形成一个微型（直径100至数百千米）的磁层、磁鞘和弓形激波系统。