Computer Science
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..655m&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 31, June 1983, p. 655-658.
Computer Science
28
Interplanetary Dust, Microparticles, Orbital Elements, Packing Density, Density (Mass/Volume), Eccentric Orbits, Helios Project, Lunar Craters, Poynting-Robertson Effect, Comets, Particles, Grains, Mantle, Mass, Helios, Experiments, Dust, Ejecta, Eccentricity, Density, Diagrams
Scientific paper
Packing forces, produced by an anisotropic sublimation of mantle material of grains located at the surface layer of loosely conglomerated fluffy particles, move the grains towards the center of the fluffy particles. This leads to a reduction of the empty space inside the fluffy particle and consequently to an increase of the mass density of the fluffy particle with time. As observed by the Helios dust experiment, fluffy particles of low density are ejected by comets with high eccentricity e and large semimajor axis a. Since e and a of fluffy particles decrease with time due to the Poynting-Robertson effect, the accompanying increase of the density of fluffy particles seems to explain the existence of normal dense particles in quasi-circular orbits as detected during in situ measurements. It also explains that the majority of lunar craters have been produced by normal dense particles rather than by low density particles.
Fechtig Hugo
Mukai Tadashi
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