Near Surface Magnetic Field Mapping over the Swirls in the SPA Region on the Moon Using Kaguya LMAG Low Altitude Data

Details Near Surface Magnetic Field Mapping over the Swirls in the SPA Region on the Moon Using Kaguya LMAG Low Altitude Data Near Surface Magnetic Field Mapping over the Swirls in the SPA Region on the Moon Using Kaguya LMAG Low Altitude Data

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmgp42a..03s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #GP42A-03

Other

[1517] Geomagnetism And Paleomagnetism / Magnetic Anomalies: Modeling And Interpretation, [1595] Geomagnetism And Paleomagnetism / Planetary Magnetism: All Frequencies And Wavelengths, [5440] Planetary Sciences: Solid Surface Planets / Magnetic Fields And Magnetism, [6250] Planetary Sciences: Solar System Objects / Moon

Scientific paper

We have reported the correlation between the high albedo marking (HAM) on the moon surface and the strength of horizontal component (Bh) of the near surface lunar magnetic field, at 2009 AGU Fall meeting, using the Lunar Prospector magnetometer data (LP-MAG). The correlation is further examined using the lowest altitude data at the latest orbits of Kaguya magnetometer data (KG-MAG). The Kaguya spacecraft (launched on September 14, 2007) dropped to the Moon at 65.5S and 80.4E on Jun 11, 2009. On the last few weeks, it flies over SPA with low altitudes as 10km, and the magnetometer acquired beautiful data. The magnetic field on the Mare Ingenii, on which we can see one of the most enhanced HAM, is restored using equivalent pole reduction (EPR) technique. First, EPR model is examined by comparing the model field and the other observations of LP-MAG and KG-MAG. They agree each other not only the shape but also the amplitude of the peaks. It indicates that the lunar magnetic field is well reproduced in 3-dimension. The magnetic field at the altitude of 5km is mapped over the Mare Ingenii and adjacent region where the HAM is clearly seen from Clementine albedo images. The coincidence of the HAM and the Bh is incredibly well, especially for the HAM in the flat crater floors. In some region, some of the detailed shapes of HAM match with the small bulge in the Bh contour. The HAM seems to be correlated maximas of Bh rather than its absolute strength. This result further support that the HMA is formed by magnetic shielding of the solar wind particles.

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