Can gravitational compaction explain the spin-diameter relation for the asteroids?
- 30 Downloads
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
Unable to display preview. Download preview PDF.
- Alfvén, H. and Arrhenius, G.: 1976,Evolution of the Solar System, NASA SP-345, Washington, D.C.Google Scholar
- Burns, J. A. and Tedesco, E. F.: 1979, in T. Gehrels (ed.),Asteroids, University of Arizona Press, Tucson, Arizona, p. 494.Google Scholar
- Dermott, S. F. and Murray, C. D.: 1982,Nature 296, 418.Google Scholar
- Halling, R.: 1983, in C.-I. Lagerkvist and H. Rickman (eds.)Asteroids, Comets, Meteors, HSC, Uppsala University, Sweden, p. 87.Google Scholar
- Schubart, J. and Matson, D. L.: 1979, in T. Gehrels (ed.)Asteroids, University of Arizona Press, Tucson, Arizona, p. 84.Google Scholar
- Tedesco, E. F. and Zappalá, V.: 1980,Icarus 43, 33.Google Scholar