Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmgp42a..01s&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #GP42A-01
Physics
[1507] Geomagnetism And Paleomagnetism / Core Processes, [1510] Geomagnetism And Paleomagnetism / Dynamo: Theories And Simulations, [1595] Geomagnetism And Paleomagnetism / Planetary Magnetism: All Frequencies And Wavelengths, [6205] Planetary Sciences: Solar System Objects / Asteroids
Scientific paper
Recent paleomagnetic studies of meteorites show that a core dynamo on meteorite parent bodies may explain the origin of their magnetism. In addition, studies of the thermal evolution of small bodies and the critical parameters for dynamo onset demonstrate that many small bodies were capable of sustaining a dynamo for a short time in their early history. Here we review the current knowledge of small body dynamos and discuss the implications for future observations of asteroids. We also discuss the differences between "small body" dynamos and "large body" (i.e. planetary) dynamos. Small bodies offer interesting core region geometries, physical parameters and convective driving that may not be seen in larger bodies. We present some preliminary results of dynamo models used to specifically model asteroid-sized dynamos.
Elkins-Tanton Linda T.
Stanley Sabine
Vilim Ryan
Weiss Benjamin P.
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