Lunar Magnetic Anomalies and Surface Optical Properties

@article{Hood1980LunarMA,
  title={Lunar Magnetic Anomalies and Surface Optical Properties},
  author={Lon L. Hood and Gerald Schubert},
  journal={Science},
  year={1980},
  volume={208},
  pages={49 - 51}
}
For typical solar wind conditions, lunar magnetic anomalies with dipole moments m >> 5 x 1013 gauss-cubic centimeters will strongly deflect the solar wind, producing local plasma voids at the lunar surface. The correlation of the largest observed anomalies (m ∼ 1016 gauss-cubic centimeters) with unusual, relatively high albedo surface features may therefore imply that solar wind ion bombardment is an important determinant of the optical properties of the lunar surface. 

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References

SHOWING 1-10 OF 23 REFERENCES
Permanent Lunar Surface Magnetism and Its Deflection of the Solar Wind
Magnetic compressions intermittently observed outside the lunar wake in the solar wind may be limb shocks caused by the presence of local regions of permanent magnetism on the lunar limb. Observable
The interaction of the solar wind with lunar magnetic anomalies
A simplified model for the interaction of the cold solar wind with lunar magnetic anomalies is considered. Since on the illuminated side of the Moon the dynamic pressure of the solar wind
Measurements of Lunar Magnetic Field Interaction with the Solar Wind
The remanent magnetic field at the lunar surface is compressed as much as 40% above its initial value by the solar wind, but the total remanent magnetic pressure is less than the stagnation pressure
Solar wind and micrometeorite effects in the lunar regolith
  • R. Housley
  • Materials Science
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1977
Using available data from the literature, we formulate an outline of the major physical and chemical effects expected during solar wind bombardment of the lunar regolith. In agreement with the
Magnetism and the interior of the Moon
During the time period 1961–1972, 11 magnetometers were sent to the moon. The primary purpose of this paper is to review the results of lunar magnetometer data analysis, with emphasis on the lunar
Alteration of Lunar Optical Properties: Age and Composition Effects
TLDR
Evidence from Apollo 11 and Apollo 12 samples and telescopic spectral reflectivity measurements indicates that the maria are similar in mineralogy on a regional scale and that the highlands are consistent with an anorthositic-gabbro composition.
Lunar magnetic anomalies detected by the Apollo substatellite magnetometers
Abstract Properties of lunar crustal magnetization thus far deduced from Apollo subsatellite magnetometer data are reviewed using two of the most accurate presently available magnetic anomaly maps —
The Moon: Sources of the Crustal Magnetic Anomalies
TLDR
Previously unmapped Apollo 16 subsatellite magnetometer data collected at low altitudes over the lunar near side are presented, implying that magnetization of lunar crustal materials must have continued for a period exceeding 1 billion years.
Effects of vapor-phase deposition processes on the optical, chemical, and magnetic properties OE the lunar regolith
The processes of solar wind sputtering and meteoritic impact vaporization have created materials in the lunar regolith which were deposited from a vapor phase. Although the quantity of such exotic
Darkening of silicate rock powders by solar wind sputtering
Hydrogen ion irradiation of powdered igneous rocks, including Apollo rocks, has been observed in the laboratory to darken the powders and to make their optical properties similar to the Moon's. An
...
1
2
3
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