Ring Seismology of the Ice Giants Uranus and Neptune
Joseph A. A'Hearn, Matthew M. Hedman, Christopher R. Mankovich, Hima, Aramona, Mark S. Marley

TL;DR
This study explores how ring seismology can be used to investigate the interior structures of Uranus and Neptune by predicting where oscillation-induced resonances might be observed in their rings.
Contribution
It provides detailed predictions of normal mode spectra and their potential ring resonances for Uranus and Neptune, aiding future interior modeling and observational efforts.
Findings
Resonances with specific azimuthal orders fall in known rings of Uranus.
Certain f-mode and g-mode resonances are predicted in Neptune's rings.
Identifying these modes could constrain interior models of the ice giants.
Abstract
We assess the prospect of using ring seismology to probe the interiors of the ice giants Uranus and Neptune. We do this by calculating normal mode spectra for different interior models of Uranus and Neptune using the stellar oscillation code GYRE. These spectra provide predictions of where in these planets' ring systems the effects of interior oscillations might be detected. We find that f-mode resonances with azimuthal order or fall among the inner rings (6, 5, 4, , and ) of Uranus, while f-mode resonances with fall in the tenuous ring region. In addition, f-mode resonances with or may give azimuthal structure to Neptune's tenuous Galle ring. We also find that g-mode resonances may fall in the middle to outer rings of these planets. Although an orbiter is most likely required to confirm the…
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Taxonomy
TopicsHigh-pressure geophysics and materials · Geophysics and Sensor Technology · Astro and Planetary Science
