Hokkaido University Collection of Scholarly and Academic Papers >
Creative Research Institution >
Peer-reviewed Journal Articles, etc >
Interior thermal state of Enceladus inferred from the viscoelastic state of the ice shell
This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Title: | Interior thermal state of Enceladus inferred from the viscoelastic state of the ice shell |
Authors: | Kamata, Shunichi Browse this author →KAKEN DB | Nimmo, Francis Browse this author |
Keywords: | Enceladus | Planetary dynamics | Interiors |
Issue Date: | 1-Mar-2017 |
Publisher: | Elsevier |
Journal Title: | Icarus |
Volume: | 284 |
Start Page: | 387 |
End Page: | 393 |
Publisher DOI: | 10.1016/j.icarus.2016.11.034 |
Abstract: | Recent geodetic measurements for Enceladus suggest a global subsurface ocean that is thicker beneath the south pole. In order to maintain such an ocean, viscous relaxation of topography at the base of the ice shell and melting of ice need to be balanced. In this study, we investigate the interior thermal state that can lead to the relaxation timescale being comparable to the melting timescale. Our results indicate that a basal heat flux about ten times higher than that due to radiogenic heating, or an ice shell tidal heating rate about ten times higher than the conventional estimate of 1.1 GW is necessary if the ice shell is in thermal equilibrium. These requirements are concordant with recent astrometric studies. |
Rights: | (C) 2016 Elsevier Inc. All rights reserved. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/72823 |
Appears in Collections: | 創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 鎌田 俊一
|