Possible nature of cometary atmosphere particles |
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| Institution: | 1. Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, 416004 India;2. Department of Chemistry, Veer Narmad South Gujarat University, Surat 395007, India;3. Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran;4. Department of Chemistry, Smt. Devkiba Mohansinhji Chauhan College of Commerce and Science, University of Mumbai, Silvassa, 396230, Dadra and Nagar Haveli (UT), India;1. Institute of Environmental and Analytical Sciences, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China;2. Agricultural & Biological Engineering Department, University of Florida, Gainesville, FL 32611, USA |
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| Abstract: | The polarimetric and spectrophotometric data of observations, the results of laboratory simulations, and theoretical calculations are considered as evidence in favor of the presence of large irregular particles in cometary atmospheres. The attempt is made to define more precisely the particle parameters. In particular, observations of some comets at small phase angles can be interpreted by light scattering on large icy grains. The results of laboratory experiments with ice at low temperatures and pressures are adduced; this can be explain the formation of a large icy grain cloud near the cometary nucleus. Changes of these particles under the effects of solar radiation are considered. |
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