Barker, AJ orcid.org/0000-0003-4397-7332 (2019) Nonlinear Tidal Flows in Short-Period Planets. In: EAS Publications Series. Astro Fluid: An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements, 27-30 Jun 2016, Paris, France. EDP Sciences , pp. 43-50. ISBN 978-2-7598-9065-1
Abstract
I discuss two related nonlinear mechanisms of tidal dissipation that require finite tidal deformations for their operation: the elliptical instability and the precessional instability. Both are likely to be important for the tidal evolution of short-period extrasolar planets. The elliptical instability is a fluid instability of elliptical streamlines, such as in tidally deformed non-synchronously rotating or non-circularly orbiting planets. I summarise the results of local and global simulations that indicate this mechanism to be important for tidal spin synchronisation, planetary spin-orbit alignment and orbital circularisation for the shortest period hot Jupiters. The precessional instability is a fluid instability that occurs in planets undergoing axial precession, such as those with spin-orbit misalignments (non-zero obliquities). I summarise the outcome of local MHD simulations designed to study the turbulent damping of axial precession, which suggest this mechanism to be important in driving tidal evolution of the spin-orbit angle for hot Jupiters. Avenues for future work are also discussed.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © EAS, EDP Sciences 2019. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Funding Information: | Funder Grant number Leverhulme Trust ECF-2014-216 |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 May 2017 10:08 |
Last Modified: | 12 Jul 2019 06:04 |
Status: | Published |
Publisher: | EDP Sciences |
Identification Number: | 10.1051/eas/1982004 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115805 |