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The dust grains in the coma of Comet West

✍ Scribed by K. S. Krishna Swamy; G. A. Shah

Publisher
Springer Netherlands
Year
1987
Tongue
English
Weight
606 KB
Volume
38
Category
Article
ISSN
1573-0794

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✦ Synopsis

The observed variation of reddening as function of the heliocentric distance and the spatial variation of reddening within the coma of Comet West in the visual wavelength range have been considered to infer the properties of the cometary dust grains. The relevant model incorporates the variation in the size distribution function as well as the composition of the spherical grains. The real part of the complex index of refraction (m = m' -im ") is chosen such that m' = 1.6. The imaginary part is required to vary from m n = 0.2 to 0.05 over the wavelength range 0.4 to 0.7 pm. This choice of refractive index corresponds to dirty silicate grains. As a by-product, the model also satisfies the observed polarization and albedo for the Comet West.

πŸ“œ SIMILAR VOLUMES

The nature of dust grains in the comae o
The nature of dust grains in the comae of Comets černis and Bowell
✍ F. Hoyle; N. C. Wickramasinghe; M. K. Wallis πŸ“‚ Article πŸ“… 1985 πŸ› Springer Netherlands 🌐 English βš– 385 KB

The currently available infrared data on scattered light from the dust comae of eernis and Bowel1 set stringent upper limits to the contribution of icy grains. For Comet Cernis the data IS consistent with only a 10% mass fraction of water-ice included within silicate-organic-carbon grains of scale r