Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data
The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell. However, the interpretation of gravity, shape, and libration data leads to contradicting results regarding the depth of ocean/ice...
Published in: | Geophysical Research Letters |
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Online Access: | http://hdl.handle.net/11564/713181 https://doi.org/10.1002/2016GL068634 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL068634 |
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ftunivchietiiris:oai:ricerca.unich.it:11564/713181 2024-04-21T08:11:56+00:00 Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data Ondřej Čadek Gabriel Tobie Tim Van Hoolst Marion Massé Gaël Choblet Axel Lefèvre Giuseppe Mitri Rose-Marie Baland Marie Běhounková Olivier Bourgeois Anthony Trinh Čadek, Ondřej Tobie, Gabriel Van Hoolst, Tim Massé, Marion Choblet, Gaël Lefèvre, Axel Mitri, Giuseppe Baland, Rose-Marie Běhounková, Marie Bourgeois, Olivier Trinh, Anthony 2016 STAMPA http://hdl.handle.net/11564/713181 https://doi.org/10.1002/2016GL068634 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL068634 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000379851800014 volume:43 issue:11 firstpage:5653 lastpage:5660 numberofpages:8 journal:GEOPHYSICAL RESEARCH LETTERS http://hdl.handle.net/11564/713181 doi:10.1002/2016GL068634 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84977449616 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL068634 info:eu-repo/semantics/openAccess Enceladu internal structure info:eu-repo/semantics/article 2016 ftunivchietiiris https://doi.org/10.1002/2016GL068634 2024-03-25T01:44:10Z The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell. However, the interpretation of gravity, shape, and libration data leads to contradicting results regarding the depth of ocean/ice interface and the total volume of the ocean. Here we develop an interior structure model consisting of a rocky core, an internal ocean, and an ice shell, which satisfies simultaneously the gravity, shape, and libration data. We show that the data can be reconciled by considering isostatic compensation including the effect of a few hundred meter thick elastic lithosphere. Our model predicts that the core radius is 180–185 km, the ocean density is at least 1030 kg/m3, and the ice shell is 18–22 km thick on average. The ice thicknesses are reduced at poles decreasing to less than 5 km in the south polar region. ©2016. American Geophysical Union. All Rights Reserved. Article in Journal/Newspaper South pole ARUd'A - Archivio Istituzionale della ricerca dell'università Chieti-Pescara (IRIS) Geophysical Research Letters 43 11 5653 5660 |
institution |
Open Polar |
collection |
ARUd'A - Archivio Istituzionale della ricerca dell'università Chieti-Pescara (IRIS) |
op_collection_id |
ftunivchietiiris |
language |
English |
topic |
Enceladu internal structure |
spellingShingle |
Enceladu internal structure Ondřej Čadek Gabriel Tobie Tim Van Hoolst Marion Massé Gaël Choblet Axel Lefèvre Giuseppe Mitri Rose-Marie Baland Marie Běhounková Olivier Bourgeois Anthony Trinh Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data |
topic_facet |
Enceladu internal structure |
description |
The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell. However, the interpretation of gravity, shape, and libration data leads to contradicting results regarding the depth of ocean/ice interface and the total volume of the ocean. Here we develop an interior structure model consisting of a rocky core, an internal ocean, and an ice shell, which satisfies simultaneously the gravity, shape, and libration data. We show that the data can be reconciled by considering isostatic compensation including the effect of a few hundred meter thick elastic lithosphere. Our model predicts that the core radius is 180–185 km, the ocean density is at least 1030 kg/m3, and the ice shell is 18–22 km thick on average. The ice thicknesses are reduced at poles decreasing to less than 5 km in the south polar region. ©2016. American Geophysical Union. All Rights Reserved. |
author2 |
Čadek, Ondřej Tobie, Gabriel Van Hoolst, Tim Massé, Marion Choblet, Gaël Lefèvre, Axel Mitri, Giuseppe Baland, Rose-Marie Běhounková, Marie Bourgeois, Olivier Trinh, Anthony |
format |
Article in Journal/Newspaper |
author |
Ondřej Čadek Gabriel Tobie Tim Van Hoolst Marion Massé Gaël Choblet Axel Lefèvre Giuseppe Mitri Rose-Marie Baland Marie Běhounková Olivier Bourgeois Anthony Trinh |
author_facet |
Ondřej Čadek Gabriel Tobie Tim Van Hoolst Marion Massé Gaël Choblet Axel Lefèvre Giuseppe Mitri Rose-Marie Baland Marie Běhounková Olivier Bourgeois Anthony Trinh |
author_sort |
Ondřej Čadek |
title |
Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data |
title_short |
Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data |
title_full |
Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data |
title_fullStr |
Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data |
title_full_unstemmed |
Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data |
title_sort |
enceladus's internal ocean and ice shell constrained from cassini gravity, shape, and libration data |
publishDate |
2016 |
url |
http://hdl.handle.net/11564/713181 https://doi.org/10.1002/2016GL068634 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL068634 |
genre |
South pole |
genre_facet |
South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000379851800014 volume:43 issue:11 firstpage:5653 lastpage:5660 numberofpages:8 journal:GEOPHYSICAL RESEARCH LETTERS http://hdl.handle.net/11564/713181 doi:10.1002/2016GL068634 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84977449616 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL068634 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2016GL068634 |
container_title |
Geophysical Research Letters |
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43 |
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5660 |
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