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- Title
The expansion of the lunar crustal field caused by a solar wind current sheet.
- Authors
Xu, Jiaying; Xu, xiaojun; Wang, jing; Chang, qing; Xu, qi
- Abstract
We report a sudden expansion of the lunar crustal field observed by ARTEMIS P1 at analtitude of 1035 km near the optical shadow boundary of the Moon. The lunar crustal field islocated at 81˚ E and 8˚ N on the lunar surface and is characterized by strong depletions ofion and electron fluxes indicative of closed magnetic field lines. Such expansion of crustalfield is found to be the combination of the crustal field, the interplanetary magnetic field andthe induced magnetic field of a solar wind current sheet. Our analysis show that the currentsheet is a rotational discontinuity with nonzero normal magnetic fields. The calculated J⋅E<0indicates that the current sheet is a small-scale dynamo. The poynting flux of this dynamo,which transfers other energies into electromagnetic energy, can provide electromagneticenergy that is required to support the expansion of the lunar crustal field in this study.
- Subjects
INTERPLANETARY magnetic fields; SOLAR magnetic fields; ELECTROMAGNETIC waves; SOLAR wind; LUNAR surface; CURRENT sheets; MAGNETIC fields
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article