Enceladus' south polar sea
Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Icarus 189: 72-82, doi:10.1016/j.icarus.2007.01.010. Recent observations of the sou...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/1780 2023-05-15T18:21:53+02:00 Enceladus' south polar sea Collins, Geoffrey C. Goodman, Jason C. 2007-01-23 application/pdf https://hdl.handle.net/1912/1780 en_US eng https://doi.org/10.1016/j.icarus.2007.01.010 https://hdl.handle.net/1912/1780 Enceladus Satellites Shapes Interiors Geophysics Preprint 2007 ftwhoas https://doi.org/10.1016/j.icarus.2007.01.010 2022-05-28T22:57:22Z Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Icarus 189: 72-82, doi:10.1016/j.icarus.2007.01.010. Recent observations of the south pole of Saturn’s moon Enceladus by the Cassini spacecraft have revealed an active world, powered by internal heat. In this paper, we propose that localized subsurface melting on Enceladus has produced an internal south polar sea. Evidence for this localized sea comes from the shape of Enceladus, which does not match a differentiated body at its current orbital position. We show that melting induced by the observed heat flow at the south pole produces a large enough pit to match the shape of Enceladus with a differentiated rock and ice interior. Numerical modeling of melting and ice flow shows that the sea produced beneath the south pole is stable against inflow of ductile ice from its surroundings for the duration of the heating. The shape modification due to melting also produces a negative degree-two gravity anomaly, which can reorient the spin axis of Enceladus in order to place the sea at the pole. Report South pole Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) South Pole Icarus 189 1 72 82 |
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Open Polar |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
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English |
topic |
Enceladus Satellites Shapes Interiors Geophysics |
spellingShingle |
Enceladus Satellites Shapes Interiors Geophysics Collins, Geoffrey C. Goodman, Jason C. Enceladus' south polar sea |
topic_facet |
Enceladus Satellites Shapes Interiors Geophysics |
description |
Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Icarus 189: 72-82, doi:10.1016/j.icarus.2007.01.010. Recent observations of the south pole of Saturn’s moon Enceladus by the Cassini spacecraft have revealed an active world, powered by internal heat. In this paper, we propose that localized subsurface melting on Enceladus has produced an internal south polar sea. Evidence for this localized sea comes from the shape of Enceladus, which does not match a differentiated body at its current orbital position. We show that melting induced by the observed heat flow at the south pole produces a large enough pit to match the shape of Enceladus with a differentiated rock and ice interior. Numerical modeling of melting and ice flow shows that the sea produced beneath the south pole is stable against inflow of ductile ice from its surroundings for the duration of the heating. The shape modification due to melting also produces a negative degree-two gravity anomaly, which can reorient the spin axis of Enceladus in order to place the sea at the pole. |
format |
Report |
author |
Collins, Geoffrey C. Goodman, Jason C. |
author_facet |
Collins, Geoffrey C. Goodman, Jason C. |
author_sort |
Collins, Geoffrey C. |
title |
Enceladus' south polar sea |
title_short |
Enceladus' south polar sea |
title_full |
Enceladus' south polar sea |
title_fullStr |
Enceladus' south polar sea |
title_full_unstemmed |
Enceladus' south polar sea |
title_sort |
enceladus' south polar sea |
publishDate |
2007 |
url |
https://hdl.handle.net/1912/1780 |
geographic |
South Pole |
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South Pole |
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South pole |
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South pole |
op_relation |
https://doi.org/10.1016/j.icarus.2007.01.010 https://hdl.handle.net/1912/1780 |
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https://doi.org/10.1016/j.icarus.2007.01.010 |
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Icarus |
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189 |
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1 |
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72 |
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82 |
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1766201213140860928 |