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The hottest hot Jupiters may host Atmospheric Dynamos

Rogers, T.M.; McElwaine, J.N.

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Authors

T.M. Rogers



Abstract

Hot Jupiters have proven themselves to be a rich class of exoplanets that test our theories of planetary evolution and atmospheric dynamics under extreme conditions. Here, we present three-dimensional magnetohydrodynamic simulations and analytic results that demonstrate that a dynamo can be maintained in the thin, stably stratified atmosphere of a hot Jupiter, independent of the presumed deep-seated dynamo. This dynamo is maintained by conductivity variations arising from strong asymmetric heating from the planets' host star. The presence of a dynamo significantly increases the surface magnetic field strength and alters the overall planetary magnetic field geometry, possibly affecting star–planet magnetic interactions.

Citation

Rogers, T., & McElwaine, J. (2017). The hottest hot Jupiters may host Atmospheric Dynamos. Astrophysical Journal Letters, 841(2), Article L26. https://doi.org/10.3847/2041-8213/aa72da

Journal Article Type Article
Acceptance Date May 12, 2017
Online Publication Date May 26, 2017
Publication Date May 26, 2017
Deposit Date Jun 5, 2017
Publicly Available Date Mar 28, 2024
Journal Astrophysical Journal Letters
Print ISSN 2041-8205
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 841
Issue 2
Article Number L26
DOI https://doi.org/10.3847/2041-8213/aa72da

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Copyright Statement
© 2017. The American Astronomical Society. All rights reserved.




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