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Review of Exchange Processes on Ganymede in View of its Planetary Protection Categorization

Grasset, O. and Bunce, E.J. and Coustenis, A. and Dougherty, M. K. and Erd, C. and Hussmann, H. and Jaumann, R. and Prieto-Ballesteros, O. (2013) Review of Exchange Processes on Ganymede in View of its Planetary Protection Categorization. Astrobiology, 13 (10), pp. 991-1004. Mary Ann Liebert Inc.. DOI: 10.1089/ast.2013.1013 ISSN 1531-1074

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Official URL: http://online.liebertpub.com/doi/abs/10.1089/ast.2013.1013

Abstract

In this paper, we provide a detailed review of Ganymede's characteristics that are germane to any consideration of its planetary protection requirements. Ganymede is the largest moon in our solar system and is the subject of one of the main science objectives of the JUICE mission to the jovian system. We explore the probability of the occurrence of potentially habitable zones within Ganymede at present, including those both within the deep liquid ocean and those in shallow liquid reservoirs. We consider the possible exchange processes between the surface and any putative habitats to set some constraints on the planetary protection approach for this moon. As a conclusion, the “remote” versus “significant” chance of contamination will be discussed, according to our current understanding of this giant icy moon. Based on the different estimates we investigate here, it appears extremely unlikely that material would be exchanged downward through the upper icy layer of Ganymede and, thus, bring material into the ocean over timescales consistent with the survival of microorganisms. Key Words: Planetary science—Planetary protection—Ice.

Item URL in elib:https://elib.dlr.de/86914/
Document Type:Article
Title:Review of Exchange Processes on Ganymede in View of its Planetary Protection Categorization
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Grasset, O.Lab. de Planétologie et de Géodynamique, Faculté des Sciences, Nantes, FranceUNSPECIFIED
Bunce, E.J.University of Leicester, United KingdomUNSPECIFIED
Coustenis, A.Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris-Meudon, 92195 Meudon Cedex, FranceUNSPECIFIED
Dougherty, M. K.Imperial College, LondonUNSPECIFIED
Erd, C.ESA/ESTECUNSPECIFIED
Hussmann, H.hauke.hussmann (at) dlr.deUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Prieto-Ballesteros, O.Centro de Astrobiologia, CSIC-INTA, Madrid, SpainUNSPECIFIED
Date:October 2013
Journal or Publication Title:Astrobiology
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.1089/ast.2013.1013
Page Range:pp. 991-1004
Publisher:Mary Ann Liebert Inc.
ISSN:1531-1074
Status:Published
Keywords:JUICE, Ganymede
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Institute of Planetary Research > Planetary Geodesy
Deposited By: Voigt, Joana
Deposited On:06 Jan 2014 09:05
Last Modified:08 Mar 2018 18:22

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