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Wahl_2016_ApJ_831_14.pdf
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FInal Published Version
Affiliation
Univ Arizona, Lunar & Planetary LabIssue Date
2016-10-21Keywords
planets and satellites: fundamental parametersplanets and satellites: gaseous planets
planets and satellites: individual (Jupiter)
planets and satellites: interiors
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IOP PUBLISHING LTDCitation
TIDAL RESPONSE OF PRELIMINARY JUPITER MODEL 2016, 831 (1):14 The Astrophysical JournalJournal
The Astrophysical JournalRights
© 2016. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
In anticipation of improved observational data for Jupiter's gravitational field, from the Juno spacecraft, we predict the static tidal response for a variety of Jupiter interior models based on ab initio computer simulations of hydrogen-helium mixtures. We calculate hydrostatic-equilibrium gravity terms, using the non-perturbative concentric Maclaurin Spheroid method that eliminates lengthy expansions used in the theory of figures. Our method captures terms arising from the coupled tidal and rotational perturbations, which we find to be important for a rapidly rotating planet like Jupiter. Our predicted static tidal Love number, k(2) = 0.5900, is similar to 10% larger than previous estimates. The value is, as expected, highly correlated with the zonal harmonic coefficient J(2), and is thus nearly constant when plausible changes are made to the interior structure while holding J(2) fixed at the observed value. We note that the predicted static k(2) might change, due to Jupiter's dynamical response to the Galilean moons, and find reasons to argue that the change may be detectable-although we do not present here a theory of dynamical tides for highly oblate Jovian planets. An accurate model of Jupiter's tidal response will be essential for interpreting Juno observations and identifying tidal signals from effects of other interior dynamics of Jupiter's gravitational field.ISSN
1538-4357Version
Final published versionSponsors
NASA's Juno project; National Science Foundation (astronomy and astrophysics research grant) [1412646]Additional Links
http://stacks.iop.org/0004-637X/831/i=1/a=14?key=crossref.94e780e5342b88a796ca8fcc59534ff5ae974a485f413a2113503eed53cd6c53
10.3847/0004-637X/831/1/14