Registration Number
0224U031682,
0122U001911
, R & D reports
Title
Diagnosis of dust in active small bodies of the solar system and outer space
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Head
Rosenbush Vira K., Доктор фізико-математичних наук
Registration Date
05-06-2024
Organization
Taras Shevchenko National University of Kyiv
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The present work is devoted to comprehensive studies of the physical, chemical, and dynamic properties of selected small bodies of the Solar System of different dynamic classes based on the results of photometric, polarimetric, and spectral observations and numerical modeling. Using the obtained extensive set of observational data, nonstationary processes in comets 67P/Churyumov–Gerasimenko, C/2013 X1 (PanSTARRS), 29P/Schwassmann–Wachmann 1, and C/2014 B1 (Schwartz), active asteroid (248370) 2005 QN173, and Centaur 174P/Echeclus are studied. Maps of the spatial distribution of brightness, color, and polarization across the coma are obtained, which indicate the evolution of particle properties with distance from the nucleus and can be diagnostic of the fragmentation rate of particles, their original sizes, and composition. Using digital filtering methods, the morphological structures in the comas of active bodies were detected which are associated with local active areas on their nuclei. Active objects' gas and dust production rates are determined and molecular emissions in their spectra are identified. Based on the results of numerical modeling, the chemical composition of dust particles in the comas of the studied objects is found. Using data from the Rosetta space mission to comet 67P/C-G, a new method for directly determining the volume distribution of dust in the inner coma is proposed. For the first time, the formation of an unstable atmosphere around the nucleus during the outburst of the comet was detected. For 12 meteors, extra-atmospheric masses, parameters of atmospheric trajectories and heliocentric orbits, coordinates of radiants, and associated meteoroid streams are established. A catalog of detected emission lines in meteor spectra is created and their classification is carried out.
Product Description
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Ivanova Oleksandra V.
Kleshchonok Valerii V.
Kozak Pavlo M.
Lukianyk Ihor V.
Mozhova Alona M.
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2024-06-05
