A preliminary global map of the vector lunar crustal magnetic field based on Lunar Prospector magnetometer data
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Univ Arizona, Lunar & Planetary LabIssue Date
2008-02-26
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AMER GEOPHYSICAL UNIONCitation
A preliminary global map of the vector lunar crustal magnetic field based on Lunar Prospector magnetometer data 2008, 113 (E2) Journal of Geophysical ResearchJournal
Journal of Geophysical ResearchRights
Copyright 2008 by the American Geophysical Union.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Previous processing of the Lunar Prospector magnetometer (LP-MAG) data has yielded ∼40% coverage of the Moon. Here, new mapping of the low-altitude LP-MAG data is reported with the goal of producing the first global vector map of the lunar crustal magnetic field. By considering all data regardless of the external plasma environment and using less restrictive editing criteria, 2360 partial and complete passes have been identified that can be used to investigate the lunar crustal magnetic anomalies. The cleanest global coverage is provided using 329 low-altitude nightside and terminator passes. An inverse power method has been used to continue the final mapping data to constant altitude. Using the 329 optimal passes, global maps of the lunar crustal magnetic field are constructed at 30 and 40 km. Consistent with previous studies: (1) the largest concentrations of anomalies are mapped antipodal to the Crisium, Serenitatis, Imbrium, and Orientale basins and (2) isolated anomalies at Reiner Gamma, Rima Sirsalis, Descartes, and Airy are mapped. Anomalies previously unmapped by the LP-MAG experiment include (1) isolated anomalies near the craters Abel and Hartwig, (2) weak magnetization within the Nectarian-aged Crisium and Moscoviense basins, and (3) a relatively weak anomaly in an area dominated by crater chains associated with the formation of Nectaris. Future work with the new low-altitude data set is discussed and will include determining whether the lunar anomalies are capable of deflecting the solar wind and investigating directions of magnetization to evaluate a possible former core dynamo.Note
6 month embargo; Version of record online: 26 February 2008ISSN
0148-0227Version
Final published versionSponsors
Processing and mapping of the Lunar Prospector magnetometer data is supported by the NASA Discovery Data Analysis Program.Additional Links
http://doi.wiley.com/10.1029/2007JE002933ae974a485f413a2113503eed53cd6c53
10.1029/2007JE002933