Possibility of a molten layer in Ganymede

Details Possibility of a molten layer in Ganymede Possibility of a molten layer in Ganymede

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1599y&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 599.

Other

Ganymede, Satellite Surfaces, Melting, Galileo Spacecraft, Planetary Magnetic Fields, Icy Satellites, Satellite Imagery, Dynamo Theory, Planetary Structure

Scientific paper

Ganymede, the largest icy satellite, has several attractive problems; one is the evidence of resurfacing and volume expansion on its surface; another is existence of a magnetic field, recently clarified by the Galileo mission. The source region of the resurfacing material is suggested to be a water layer beneath the surface ice crust, and to generate the magnetic field, Ganymede must have a molten region where the dynamo motion is possible. To consider these features, the evolution of the internal structure of the satellite is a key. The aim of this study is to obtain possible locations of the molten layer and to estimate their lifetime based on the simulation. We propose a detailed picture of the thermal evolution of Ganymede, starting from the differentiated structure, which has a vast water mantle state, by solving the phase change problem.

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