Other
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icar..149..351k&link_type=abstract
Icarus, Volume 149, Issue 2, pp. 351-356 (2001).
Other
11
Scientific paper
Efforts to apply a single-scattering polarized radiative transfer code to interpret photopolarimetric measurements of coma dust optical properties in Comet Hale-Bopp corroborate previous photometrically derived conclusions concerning the predominance of small sized particles in Hale-Bopp's coma. Calculations of the degree of linear polarization (DP) as a function of observation phase angle (α) produced by prolate spheroidal crystalline olivine particles with effective radii (a=0.216 μm) are compatible with the comet's measured polarization in standard filters at λ=0.4845 and 0.684 μm. Our rudimentary ``trade-off'' studies highlight the extreme sensitivity of DP to dust particle size and shape. A combination of viewing geometry effects in association with enhanced multiple scattering might provide a quantitative explanation of the negative polarization for 0°<=α<=20° seen in Hale-Bopp and other comets.
Kerola Dana Xavier
Larson Stephen M.
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