Source:http://linkedlifedata.com/resource/pubmed/id/16672964
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
7089
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| pubmed:dateCreated |
2006-5-4
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| pubmed:abstractText |
The rotation rate of a planet is one of its fundamental properties. Saturn's rotation, however, is difficult to determine because there is no solid surface from which to time it, and the alternative 'clock'--the magnetic field--is nearly symmetrically aligned with the rotation axis. Radio emissions, thought to provide a proxy measure of the rotation of the magnetic field, have yielded estimates of the rotation period between 10 h 39 min 22 s and 10 h 45 min 45 s (refs 8-10). Because the period determined from radio measurements exhibits large time variations, even on timescales of months, it has been uncertain whether the radio-emission periodicity coincides with the inner rotation rate of the planet. Here we report magnetic field measurements that revealed a time-stationary magnetic signal with a period of 10 h 47 min 6 s +/- 40 s. The signal appears to be stable in period, amplitude and phase over 14 months of observations, pointing to a close connection with the conductive region inside the planet, although its interpretation as the 'true' inner rotation period is still uncertain.
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| pubmed:commentsCorrections | |
| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
May
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| pubmed:issn |
1476-4687
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| pubmed:author | |
| pubmed:issnType |
Electronic
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| pubmed:day |
4
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| pubmed:volume |
441
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
62-4
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| pubmed:year |
2006
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| pubmed:articleTitle |
A regular period for Saturn's magnetic field that may track its internal rotation.
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| pubmed:affiliation |
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA. giacomo.giampieri@jpl.nasa.gov
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| pubmed:publicationType |
Journal Article
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