Tidal Dissipation in Giant Planets
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1.
California Institute of Technology
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2.
Observatoire de la Côte d'Azur
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3.
University of Paris
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4.
Queen Mary University of London
Abstract
Tidal interactions between moons and planets can have major effects on the orbits, spins, and thermal evolution of the moons. In the Saturn system, tidal dissipation in the planet transfers angular momentum from Saturn to the moons, causing them to migrate outwards. The rate of migration is determined by the mechanism of dissipation within the planet, which is closely tied to the planet's uncertain structure. We review current knowledge of giant planet internal structure and evolution, which has improved thanks to data from the Juno and Cassini missions. We discuss general principles of tidal dissipation, describing both equilibrium and dynamical tides, and how dissipation can occur in a solid core or a fluid envelope. Finally, we discuss the possibility of resonance locking, whereby a moon can lock into resonance with a planetary oscillation mode, producing enhanced tidal migration relative to classical theories, and possibly explaining recent measurements of moon migration rates.
Copyright and License
© The Author(s) 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Acknowledgement
This work was inspired by a workshop hosted by the International Space Science Institute in Bern, Switzerland.
Funding
We gratefully acknowledge support from the International Space Science Institute. S. M. acknowledges support from PNP (CNRS/INSU) and PLATO CNES grant at CEA/DAp.
Data Availability
No new data has been used in this work. Data and analysis scripts can be found in referenced materials.
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Additional details
Related works
- Describes
- Journal Article: https://rdcu.be/eMN0A (ReadCube)
- Is new version of
- Discussion Paper: arXiv:2402.05338 (arXiv)
Funding
- International Space Science Institute
- Centre National de la Recherche Scientifique
- Centre National d'Études Spatiales
Dates
- Accepted
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2024-02-07
- Available
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2024-02-20Published online