Computer Science
Scientific paper
Mar 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21..513g&link_type=abstract
Planetary and Space Science, Volume 21, Issue 3, p. 513-521.
Computer Science
9
Scientific paper
To provide material for interpretations of forthcoming zodiacal light measurements the characteristics of 468 single-component, in-ecliptic models are summarized in two survey diagrams. The models are based on Mie theory and on a power law dn ∞ r-γα-k dα for the dependence of the particle number density n on solar distance r and on the size parameter α (circumference/wavelength). The size range involves particles with αmin <= α <= 120; (αmin = 1,2,4,10,60), flat (k = 2.5) and steep (k = 4) size spectra, and complex refractive indices m = m1 - m2i with m1 = 1.33 1.5 1.7 and m2 = 0; 0.01 0.05 0.1. The models suggest that the spatial variation of dust particle number densities should be less than about ∞ r-0.5 in the ecliptic plane. Either dielectric particles of tenth-micron size or absorbing particles of half-micron size or very slightly absorbing particles of some tens of microns in size are able to produce polarization that agrees in sign and location of the maximum with the observations. Ambiguities can only be removed by considering intensity and polarization over a wide range of wavelengths.
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