Other
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p21a0200l&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #P21A-0200
Other
5440 Magnetic Fields And Magnetism, 6225 Mars, 6297 Instruments And Techniques, 1519 Magnetic Mineralogy And Petrology, 1540 Rock And Mineral Magnetism
Scientific paper
Results from the "Magnetic Properties Experiments" onboard the Mars Exploration Rovers Spirit and Opportunity will be presented. Each rover carries seven magnets for detailed investigation of the magnetic properties of airborne dust and rocks on Mars, each magnet with a specific scientific purpose. The ring shaped sweep magnet has attracted airborne dust and the results from analysis of Pancam images from both rovers show that essentially all the dust suspended in the Martian atmosphere is somewhat magnetic in the sense that the particles are attracted to permanent magnets. The capture and filter magnet are designed so that the capture magnet is as strong as possible, and therefore has attracted all magnetic dust particles within its reach, while the filter magnet is designed to preferentially attract the more strongly magnetic dust particles. Differences in reflectivity spectra from these two magnets as observed by Pancam show that the filter magnet have succeded in picking out a more magnetic fraction of the airborne particles on both rovers. This provides interesting samples for further studies by the Microscopic Imager, the APX spectrometer and the Mössbauer spectrometer. The four RAT magnets, placed in the Rock Abrasion Tool, provide information about the magnetic material present within the rocks. There are three different RAT magnets; two of the four magnets (#1) are identical and very strong. These magnets are designed to attract all magnetic particles from the grinding process that happen to come close to this magnet, while the two other RAT magnets (#2 and #3) are different and designed - as the filter magnet - to different degrees to attract and hold preferentially the more strongly magnetic particles liberated by the grinding process.
Bertelsen Preben
Faurschou Hviid S.
Goetz Walter
Hjollum J. I.
Kinch Kjartan
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