Comparative analysis of gas and dust properties in comets of different dynamical groups

Ivanova Oleksandra

Currently, attempts are underway to establish a taxonomy of comets on the basis of their 
composition and to link them to the place of their origin. A comparison of physical 
characteristics of short-period comets with those for long-period and new comets 
(in the Oort sense) may elucidate which properties of comets are primordial and 
which are a product of subsequent evolution. Study of spectrophotometric and polarization 
properties of different comets may also provide classification of comets and understanding 
the main processes of dust and gas formation in the protosolar nebula. In addition, 
spectrophotometric and polarimetric characteristics of comets may indicate differences 
in the properties of dust and gas on the surface and inside of nuclei through observations 
of jets and different fragments of comets. For these purposes, we perform systematic photometric, 
spectral and polarimetric observations of comets (from different dynamical groups) that are 
available for our instruments. Here we present the comparison of results for selected comets 
from different dynamical group.