A 3-dimensional Thermal Model For Icy Bodies In The Solar System.

Details A 3-dimensional Thermal Model For Icy Bodies In The Solar System. A 3-dimensional Thermal Model For Icy Bodies In The Solar System.

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.5204g&link_type=abstract

American Astronomical Society, DPS meeting #39, #52.04; Bulletin of the American Astronomical Society, Vol. 39, p.517

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Scientific paper

Icy bodies such as comets and trans-neptunian objects are believed to be pristine remnants of solar system formation. Many observations are currently carried out to investigate their surface properties such as the phase of water ice (amorphous or crystalline), and the presence of other volatile species. Those properties can be altered by external processes such as interaction with solar radiation, space weathering or impacts, or by internal processes such as thermal heating or phase transition.
Modelling of internal processes has therefore been performed, with the aim of understanding the thermal and structural evolution of such bodies. Early models were one-dimensional, requiring approximations such as that of a fast-rotating body, but allowing to include in the scheme very complex physics. More recent works have achieved quasi-three-dimensional modelling, as they include 3D boundary conditions, still assuming that the radial heat flux prevails. However, none of these models computes both azimuthal and meridional heat flux distribution.
We present in this work a new 3D thermal model developped for spherical icy bodies, in which lateral heat fluxes are accounted for through expansion of the temperature on spherical harmonics. 3D boundary conditions are considered. Initial results obtained for various objects differing in size and orbit will be presented.

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