On the occurrence of magnetic enhancements caused by solar wind interaction with lunar crustal fields

被引:43
作者
Halekas, JS [1 ]
Brain, DA
Mitchell, DL
Lin, RP
Harrison, L
机构
[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
[2] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
关键词
D O I
10.1029/2006GL025931
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We use Lunar Prospector data to identify 990 magnetic enhancements, previously termed "limb shocks'' or "limb compressions'', external to the lunar wake. We find that they are clearly associated with lunar crustal sources, and sometimes occur far upstream from the limb at altitudes of similar to 100 km. This is inconsistent with compressional disturbances convecting downstream with the solar wind, and implies that crustal fields are sometimes strong and coherent enough to produce a fluid-like interaction where compressional waves steepen to form a shock extending upstream from their source. The likelihood of observing enhancements partly depends on upstream solar wind conditions, with low proton gyroradius and low beta particularly favored. Low Mach numbers, implying a larger shock standoff distance, are also favored for observations which suggest shock-like behavior.
引用
收藏
页数:4
相关论文
共 13 条
  • [1] Magnetic field orientation effects on the standoff distance of Earth's bow shock
    Cairns, IH
    Lyon, JG
    [J]. GEOPHYSICAL RESEARCH LETTERS, 1996, 23 (21) : 2883 - 2886
  • [2] MAGNETIC OBSERVATIONS OF LUNAR CAVITY
    COLBURN, DS
    MIHALOV, JD
    SONETT, CP
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH, 1971, 76 (13): : 2940 - +
  • [3] CONDITIONS FOR MAGNETIC INTERACTION OF ASTEROIDS WITH SOLAR WIND
    GREENSTADT, EW
    [J]. ICARUS, 1971, 14 (03) : 374 - +
  • [4] Electrons and magnetic fields in the lunar plasma wake
    Halekas, JS
    Bale, SD
    Mitchell, DL
    Lin, RP
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2005, 110 (A7)
  • [5] 2.5-D fluid simulations of the solar wind interacting with multiple dipoles on the surface of the Moon
    Harnett, EM
    Winglee, RM
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2003, 108 (A2)
  • [6] Initial mapping and interpretation of lunar crustal magnetic anomalies using Lunar Prospector magnetometer data
    Hood, LL
    Zakharian, A
    Halekas, J
    Mitchell, DL
    Lin, RP
    Acuña, MH
    Binder, AB
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2001, 106 (E11) : 27825 - 27839
  • [7] Lunar surface magnetic fields and their interaction with the solar wind:: Results from lunar prospector
    Lin, RP
    Mitchell, DL
    Curtis, DW
    Anderson, KA
    Carlson, CW
    McFadden, J
    Acuña, MH
    Hood, LL
    Binder, A
    [J]. SCIENCE, 1998, 281 (5382) : 1480 - 1484
  • [8] PERTURBATIONS OF INTERPLANETARY MAGNETIC FIELD BY LUNAR WAKE
    NESS, NF
    BEHANNON, KW
    TAYLOR, HE
    WHANG, YC
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH, 1968, 73 (11): : 3421 - &
  • [9] Hybrid simulations of solar wind interaction with magnetized asteroids: General characteristics
    Omidi, N
    Blanco-Cano, X
    Russell, CT
    Karimabadi, H
    Acuna, M
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2002, 107 (A12)
  • [10] SOURCE OF LUNAR LIMB COMPRESSIONS
    RUSSELL, CT
    LICHTENSTEIN, BR
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1975, 80 (34): : 4700 - 4711