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arXiv 0907.4428astro-ph.EP
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从反转到半球形发电机

From reversing to hemispherical dynamos

Basile Gallet, François Pétrélis

摘要:

我们表明,半球发电机可以导致弱赤道对称性破缺的内部流动的行星和恒星。利用球形发电机模型,我们观察到,当赤道对称性被破坏时,偶极模和四极模之间的相互作用可以使磁场仅局限于一个半球。这个过程被证明是相关的一个负责的磁场的逆转。因此,这些看似非常不同的行为可以在统一的框架中理解。

英文摘要:

We show that hemispherical dynamos can result from weak equatorial symmetry breaking of the flow in the interior of planets and stars. Using a model of spherical dynamo, we observe that the interaction between a dipolar and a quadrupolar mode can localize the magnetic field in only one hemisphere when the equatorial symmetry is broken. This process is shown to be related to the one that is responsible for reversals of the magnetic field. These seemingly very different behaviors are thus understood in a unified framework.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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