Physics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..23.1299s&link_type=abstract
Advances in Space Research, Volume 23, Issue 7, p. 1299-1308.
Physics
3
Scientific paper
Physical quantities basic to the internal evolution of an icy planetesimal, which we assume to be a porous aggregate of grains covered with icy mantles, are examined including thermal conductivities of ice mixtures and porous grain aggregates, the latent heat of crystallization of amorphous H2O ice containing volatile molecules, cohesion between the icy mantles of the grains, and tensile strength of the grain aggregates. The evolution of the icy planetesimals is investigated using the newly derived expressions of the above quantities. It is revealed that the evolution of the icy planetesimals diverges into three paths in terms of the crystallization degree of amorphous H2O ice, the volatile composition and the tensile strength, depending on the initial chemical composition of the volatile species in the ice.
Sirono S.
Yamamoto Tadahiro
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