| Global distribution of crustal magnetization discovered by the mars global surveyor MAG/ER experiment | |
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MedLine Citation:
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PMID: 10221908 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Vector magnetic field observations of the martian crust were acquired by the Mars Global Surveyor (MGS) magnetic field experiment/electron reflectometer (MAG/ER) during the aerobraking and science phasing orbits, at altitudes between approximately 100 and 200 kilometers. Magnetic field sources of multiple scales, strength, and geometry were observed. There is a correlation between the location of the sources and the ancient cratered terrain of the martian highlands. The absence of crustal magnetism near large impact basins such as Hellas and Argyre implies cessation of internal dynamo action during the early Naochian epoch ( approximately 4 billion years ago). Sources with equivalent magnetic moments as large as 1.3 x 10(17) ampere-meter2 in the Terra Sirenum region contribute to the development of an asymmetrical, time-variable obstacle to solar wind flow around Mars. |
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Authors:
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Acuna; Connerney; Ness; Lin; Mitchell; Carlson; McFadden; Anderson; Reme; Mazelle; Vignes; Wasilewski; Cloutier |
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Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: Science (New York, N.Y.) Volume: 284 ISSN: 1095-9203 ISO Abbreviation: Science Publication Date: 1999 Apr |
Date Detail:
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Created Date: 1999-05-05 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0404511 Medline TA: Science Country: - |
Other Details:
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Languages: Eng Pagination: 790-3 Citation Subset: - |
Affiliation:
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NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA. Bartol Research Institute, University of Delaware, Newark, DE 19716, USA. Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA. Centre d'Etude Spatiale des Rayonn. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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