Timing of water plume eruptions on Enceladus explained by interior viscosity structure

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10314657" target="_blank" >RIV/00216208:11320/15:10314657 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/NGEO2475" target="_blank" >http://dx.doi.org/10.1038/NGEO2475</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/NGEO2475" target="_blank" >10.1038/NGEO2475</a>

Result language
angličtina
Original language name
Timing of water plume eruptions on Enceladus explained by interior viscosity structure
Original language description
At the south pole of Saturn's icy moon Enceladus, eruptions of water vapour and ice emanate from warm tectonic ridges(1-4). Observations in the infrared(5) and visible(6) spectra have shown an orbital modulation of the plume brightness, which suggests that the eruption activity is influenced by tidal forces. However, the observed activity seems to be delayed by several hours with respect to predictions based on simple tidal models(6,7). Here we simulate the viscoelastic tidal response of Enceladus witha full three-dimensional numerical model(8,9) and show that the delay in eruption activity may be a natural consequence of the viscosity structure in the south-polar region and the size of the putative subsurface ocean. By systematically comparing simulations of variations in normal stress along faults with plume brightness data, we show that the observed activity is reproduced for two classes of interior models with contrasting thermal histories: a low-viscosity convective region above
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DE - Earth magnetism, geodesy, geography
OECD FORD branch
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Project
<a href="/en/project/GA14-04145S" target="_blank" >GA14-04145S: Internal evolution of close-in terrestrial exoplanets</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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