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Outward expansion of the lunar wake: ARTEMIS observations
Zhang, H.; Khurana, K. K.; Zong, Q. -G.; Kivelson, M. G.; Hsu, T. -S.; Wan, W. X.; Pu, Z. Y.; Angelopoulos, V.; Cao, X.; Wang, Y. F.; Shi, Q. Q.; Liu, W. L.; Tian, A. M.; Tang, C. L.; Zhang, H (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China.
Department空间科学部
Source PublicationGEOPHYSICAL RESEARCH LETTERS
2012
Volume39Pages:L18104
ISSN0094-8276
Language英语
AbstractMagnetohydrodynamics (MHD) predicts that lunar wake expands outward at magnetosonic velocities in all directions perpendicular to background solar wind; however, fluid theories emphasize that lunar wake expands outward at sound speeds mainly along the interplanetary magnetic field (IMF). Early observations supported the MHD predictions in the near-moon region despite lack of solar wind and IMF observations. Thanks to the special orbit design of the ARTEMIS mission, the solar wind conditions are well determined at the time of concurrent observations in the lunar wake. 164 wake crossings made by ARTEMIS are statistically studied in this paper. Observations indicated that, in either distant or near-Moon regions, the lunar wake expands outward at the fast MHD wave velocities. This simple model provides a powerful way to determine wake boundaries, particularly at large distances where the boundary signatures are indistinct, thus allowing further studies on the Moon-solar wind/crustal field-solar wind interactions. Citation: Zhang, H., et al. (2012), Outward expansion of the lunar wake: ARTEMIS observations, Geophys. Res. Lett., 39, L18104, doi: 10.1029/2012GL052839.; Magnetohydrodynamics (MHD) predicts that lunar wake expands outward at magnetosonic velocities in all directions perpendicular to background solar wind; however, fluid theories emphasize that lunar wake expands outward at sound speeds mainly along the interplanetary magnetic field (IMF). Early observations supported the MHD predictions in the near-moon region despite lack of solar wind and IMF observations. Thanks to the special orbit design of the ARTEMIS mission, the solar wind conditions are well determined at the time of concurrent observations in the lunar wake. 164 wake crossings made by ARTEMIS are statistically studied in this paper. Observations indicated that, in either distant or near-Moon regions, the lunar wake expands outward at the fast MHD wave velocities. This simple model provides a powerful way to determine wake boundaries, particularly at large distances where the boundary signatures are indistinct, thus allowing further studies on the Moon-solar wind/crustal field-solar wind interactions. Citation: Zhang, H., et al. (2012), Outward expansion of the lunar wake: ARTEMIS observations, Geophys. Res. Lett., 39, L18104, doi: 10.1029/2012GL052839.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3091
Collection空间科学部
Corresponding AuthorZhang, H (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, H.,Khurana, K. K.,Zong, Q. -G.,et al. Outward expansion of the lunar wake: ARTEMIS observations[J]. GEOPHYSICAL RESEARCH LETTERS,2012,39:L18104.
APA Zhang, H..,Khurana, K. K..,Zong, Q. -G..,Kivelson, M. G..,Hsu, T. -S..,...&Zhang, H .(2012).Outward expansion of the lunar wake: ARTEMIS observations.GEOPHYSICAL RESEARCH LETTERS,39,L18104.
MLA Zhang, H.,et al."Outward expansion of the lunar wake: ARTEMIS observations".GEOPHYSICAL RESEARCH LETTERS 39(2012):L18104.
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