T.M. Rogers
The hottest hot Jupiters may host Atmospheric Dynamos
Rogers, T.M.; McElwaine, J.N.
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 | Jun 7, 2017 |
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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