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| Titel |
Evidence from numerical experiments for a feedback dynamo generating Mercury’s magnetic field. |
| VerfasserIn |
D. Heyner, J. Wicht, N. Gómez-Pérez, D. Schmitt, H.-U. Auster, K.-H. Glassmeier |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250063877
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| Zusammenfassung |
| The observed weakness of the magnetic field of planet Mercury poses a long-standing
problem to dynamo theory. We explore the conjecture that the dynamo evolution could be damped by a negative feedback process of magnetospheric origin since Mercury is embedded within a strong magnetospheric field. We present results from a numerical experiment showing how it is possible to capture the dynamo in a weak state in a powering up phase already with a weak external field. The numerical simulation enables us to show how the dynamics inside the inaccessible core are altered by the feedback and how the transition to a strong field dynamo is inhibited. We conclude with a description of the outside characteristics of the feedback dynamo which can be compared to satellite data. |
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