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Information × Registration Number 0225U000523, (0123U103122) , R & D reports Title Galaxies with rings: nuclear activity and star formation popup.stage_title Створення підвибірок галактик з кільцями та полярними кільцями у яких є: спалах зореутворення, активне ядро. Порівняльний аналіз, пошук залежностей типу активності від морфологічних особливостей. Аналіз випромінювання індивідуальних об'єктів. Head Dobrycheva Daria V., Кандидат фізико-математичних наук Registration Date 13-01-2025 Organization Main Astronomical Observatory of the National Academy of Sciences of Ukraine popup.description1 To create catalogs of galaxies with rings and galaxies with polar rings, to select among them the share of galaxies with active nuclei and with a dominant contribution to star formation. To determine the physical properties and features of such galaxies, since their formation corresponds to various evolutionary scenarios during the merger of galaxies. popup.description2  Analyzed catalogues of galaxies with and polar ring galaxies. The catalogues were supplemented with available photometric data from UV and IR bands. Among the objects in the catalogues, galaxies with active nuclei and those dominated by star formation were identified. A multiwavelength analysis of selected galaxies was conducted. A catalog of galaxies was created, and a visual inspection was performed. The results are being prepared for publication in the VizieR Online Data Catalog. A catalog of polar ring galaxies was compiled, and each object underwent visual inspection. The catalogue was expanded using modern augmentation methods and prepared for training neural networks. Objects that could be candidates for polar ring galaxies were identified. A multiwavelength analysis of galaxies with ring revealed that active nuclei are present in only 3% of the objects. Based on cross-correlation with catalogues of active nuclei and X-ray sources (SWIFT/BAT, SRG/eROSITA, Chandra), it was found that only five galaxies overlap with X-ray sources, indicating weak nuclear activity characteristic of older morphological types with low gas content. Most galaxies have a stellar mass of approximately 10^{11} solar masses, with neutral hydrogen comprising about 18% of this mass. Infrared diagrams based on WISE data revealed weak LINER-type activity or star formation processes in about 10% of the objects. The results confirm that galaxies with ring are old systems with low activity levels. Spectral energy distribution (SED) modelling using CIGALE allowed for estimating stellar component masses and star formation rates for galaxies with polar ring and isolated galaxies with ring. Product Description popup.authors Hetmantsev Oleksandr O. Dobrycheva Daria V. Kompaniiets Olena V. Pastoven Olena S. popup.nrat_date 2025-01-13 Close