Comets as porous aggregates of interstellar dust.


A comet model is derived based on the interstellar dust chemical composition in dense molecular and diffuse clouds resulting from their subsequent chemical interactions and UV photoprocessing. The collapsing presolar nebula leads to a porous aggregate model for comet nuclei, from which is derived certain physical properties that include thermal conductivity and tensile strength. The porous morphological structure is also shown to imply anomalous (expansion rather than contraction) behavior when subjected to strong shock waves, which is supported by recent shock experiments on (porous) carbonaceous chondrite material.

Cite this paper

@article{Greenberg1997CometsAP, title={Comets as porous aggregates of interstellar dust.}, author={Julian Greenberg and John L. Remo}, journal={Annals of the New York Academy of Sciences}, year={1997}, volume={822}, pages={96-117} }