Icy particles from comets

Details Icy particles from comets Icy particles from comets

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...80..254m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 80, Aug. 1989, p. 254-266.

Physics

Optics

8

Comets, Ice, Interplanetary Dust, Orbital Mechanics, Radiation Pressure, Comet Nuclei, Geometrical Optics, Mie Scattering, Poynting-Robertson Effect, Sublimation, Comets, Ice, Particles, Ejection, Grains, Size, Emissions, Velocity, Radius, Distance, Orbital Elements, Solar Radiation, Pressure, Sputtering, Sublimation, Collisions, Calculations, Absorption, Inclusions, Temperature

Scientific paper

Orbital changes at the moment of ejection are the bases of the present evaluation of survival probability for particles ejected from a comet. It is established that a portion of the dirty water-ice grains thus ejected can attain bound orbits. Surviving grains taking the orbits with perihelion distances of less than 7 AU completely lose their water-ice component, primarily due to sublimation. Grains moving on orbits with greater-than-7 AU perihelion distances change their orbits to a significant degree, due to the Poynting-Robertson effect, when grain radii are less than 100 microns, and are destroyed by collisions when grain radii are greater than 100 microns.

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