Cometary dust size distributions from flyby spacecraft

Details Cometary dust size distributions from flyby spacecraft Cometary dust size distributions from flyby spacecraft

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ioch.rept..137d&link_type=abstract

In NASA, Washington, Infrared Observations of Comets Halley and Wilson and Properties of the Grains p 137-138 (SEE N89-13330 04-

Computer Science

Cometary Atmospheres, Cosmic Dust, Infrared Spectra, Particle Size Distribution, Approximation, Comet Tails, Fluence, Particle Flux Density

Scientific paper

Pior to the Halley flybys in 1986, the distribution of cometary dust grains with particle size were approximated using models which provided reasonable fits to the dynamics of dust tails, anti-tails, and infrared spectra. These distributions have since been improved using fluence data (i.e., particle fluxes integrated over time along the flyby trajectory) from three spacecraft. The fluence derived distributions are appropriate for comparison with simultaneous infrared photometry (from Earth) because they sample the particles in the same way as the IR data do (along the line of sight) and because they are directly proportional to the concentration distribution in that region of the coma which dominates the IR emission.

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