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Seminar 22.03.2023 – 15:00

Опубликовано: 20/03/2023

Sergienko M.V. – Kazan Federal University, Kazan
Creation of a system of genetic relationships between meteor showers and their parent bodies using a multi-parameter model of near-Earth celestial objects (according to the results of the Ph.D. thesis)
Currently, the registry of the International Astronomical Union (IAU) contains information on 110 meteor showers confirmed by observations, 78 of them are orphan showers with unfound parent bodies (PBs), mostly small meteor showers with low activity, which complicates their observation and research. Thus,
the study of the entire complex of MNTs and the establishment of their genetic relationships is very important.
To identify the meteor shower from PB, a synthetic method was developed, which includes a set of criteria for the similarity of orbits and dynamic criteria, which are a consequence of solving the restricted three-body problem. When studying MNT bonds, there is a problem in the form of the lack of a unified method for finding the threshold values of the criteria relative to which the proximity of the orbits of bound MNTs is determined. In this paper, to solve this problem, an algorithm for finding threshold values for each of the criteria included in the synthetic method was developed and applied. There is also the problem of selecting identified objects. As part of solving this problem, an independent method for selecting candidates for PB was developed and applied for the selection of related NEAs.
The created synthetic method was applied to analyze the relationships between the small meteor complexes δ-Cancrids, κ-Cygnids, h-Virginids, Andromedids, and ρ-Geminids with the NEA of the Apollo and Amor groups. For the selection of related NEAs, an independent method for selecting candidates for
the PB was developed and applied. To check the reliability of the selected NEAs, their relationships were assessed on the basis of the independent Southworth-Hawkins DSH criteria and its modification, the Asher DAH criterion.
The structure of meteor showers has been studied – the distribution by mass and the nature of the change in the luminosity function along the Earth’s orbit, the radiants have been determined, and the distribution of the orbital elements of the meteor showers has been analyzed.
The results for the identified NEAs showed good agreement with the probable PBs previously obtained by other authors for these meteor complexes.
Based on the results of the work, 17 articles were published in the journals of the SCOPUS and WoS citation system and 19 oral presentations were made at All-Russian and International conferences.

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