Gravitational heating of planets |
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| Authors: | GP Horedt |
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| Institution: | Max Planck Institut für Astrophysik, Munich 40 Federal Republic of Germany |
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| Abstract: | Analytical estimates for three important and general planetary heating processes, excluding radioactive heating, are presented: accretional heating, adiabatic compression and core formation. The relative importance of these processes appears to be as follows. Accretional heating is important for almost all planets and satellites including asteroid-size bodies. Heating due to core formation becomes important for objects which are similar to, or larger than the terrestrial planets. Compressional heating is important only for the outer cores and the envelopes of the giant planets, provided that they are heated, before compression, up to about 1000 K. |
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