Can gravitational compaction explain the spin-diameter relation for the asteroids?
Dermott and Murray (1982) have found certain relations between mean spin frequency and mean diameter for asteroids. By assuming that matter gets compacted during the evolution of an asteroid, these relations may be explained by means of a spin formula for accreted bodies given by Alfvén and Arrhenius. We present a rough model for gravitational compaction of porous matter in asteroids, combine it with the spin formula, and fit the result to Dermott's and Murray's spin-diameter curves. The values obtained for the parameters (mass densities and material strengths) appear to be of a quite realistic order of magnitude.
KeywordsCompaction Mass Density Material Strength Porous Matter Realistic Order
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