On the tidal heating of Enceladus |
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| Institution: | 1. Environmental Fluid Dynamics Laboratory, Department of Civil Engineering, Queen’s University, Kingston, Ontario, K7L 3 N6, Canada;2. Environment Canada, Water Science & Technology, National Water Research Institute, Canada Centre for Inland Waters, Burlington, Ontario L7R 4A6, Canada;3. Physics of Aquatic Systems Laboratory, Margaretha Kamprad Chair EPFL-ENAC-IEE-APHYS, Lausanne CH-1015, Switzerland;1. Department of Pharmacy, University of Patras, Patras 26500, Greece;2. Department of Materials Science, University of Patras, Patras 26500, Greece;3. Regional Centre for Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University in Olomouc, 17.listopadu 1192/12, 771 46 Olomouc, Czech Republic;4. Institute of Biology, Medicinal Chemistry & Biotechnology, NHRF, Athens, Greece;5. Department of Chemistry and Positron Emission Tomography Research Centre, University of Hull, Cottingham Road, Hull HU6 7RX, UK;6. Institute of Nuclear and Particle Physics, NCSR “Demokritos”, Athens, Greece;1. Univ. Grenoble Alpes/CNRS/IRD/G-INP, IGE, Grenoble, France;2. Met Office, Exeter, United Kingdom;3. Mercator Ocean, Ramonville Saint Agne, France;4. Sorbonne Universités (University Pierre et Marie Curie Paris 6)-CNRS-IRD-MNHN, LOCEAN Laboratory, Paris, France;5. University of New South Wales, Sydney, Australia |
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| Abstract: | Enceladus, one of Saturn's moons, shows significant volcanic activity identified by the Cassini spacecraft. The aim of the present study is to investigate – with the adaptation of mathematical tools used in geodynamics – the extent of tidal heating due to the mean motion resonance with Dione. For the purpose of calculations a two-layer model of Enceladus was used. The inner part of the model is a “rocky core” with a relative radius 0.55, while the outer part is composed of water ice. The results of model calculations show that the effective tidal heating is not uniformly distributed within Enceladus. It was found for the selected model of Enceladus, that the tidal heating is maximum within the depth interval (25–75) km. Due to the inhomogeneity within Enceladus, 85% of the tidal energy is generated in a volume that contains just 39% of its mass. In time intervals of 3.0 × 108 and 5.3 × 108 years the temperature increase in the relative depth range 0.70 ≤ r/aE ≤ 0.90 is approximately 270 and 370 K, respectively. |
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