Interplanetary dust between 1 and 5 AU

Details Interplanetary dust between 1 and 5 AU Interplanetary dust between 1 and 5 AU

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...37..457s&link_type=abstract

Icarus, vol. 37, Feb. 1979, p. 457-466.

Physics

1

Interplanetary Dust, Meteoroid Concentration, Zodiacal Dust, Comets, Imaging Techniques, Interplanetary Medium, Isophotes, Particle Density (Concentration), Pioneer 10 Space Probe, Pioneer 11 Space Probe, Polarimeters, Spaceborne Photography, Zodiacal Light, Pioneer 10, Pioneer 11, Cosmic Dust, Flux, Orbits, Observations, Sun, Distance, Concentration, Wavelengths, Zodiacal Light, Spectrum, Particles, Brightness, Optical Properties

Scientific paper

Analyses of data from the Meteoroid Detection Experiment (MDE) and the Imaging Photopolarimeter (IPP) aboard Pioneer 10 and 11 have led to contradictory conclusions. While the MDE indicates a significant particle environment in the outer solar system (out to at least 5 AU), the IPP sees no zodiacal light (therefore implying no small particles) past 3.3 AU. These two results are reconciled by noting that the spectral index p (relating particle radius and particle concentration) is not a constant in the solar system but changes from less than 2 near 1 AU to more than 2.5 at 5 AU for particles in the range of 10 microns.

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