Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 122595 10.12737/stp-122202610 ewxzfl Results of current research Results of current research Results of current research Analysis of giant radio source candidates based on multiwavelength data Analysis of giant radio source candidates based on multiwavelength data Желенкова Ольга Петровна Zhelenkova Olga Petrovna zhe@sao.ru Хоруженко Милена Викторовна Khoruzhenko Milena Viktorovna milenka_khoruzhenko@mail.ru Специальная астрофизическая обсерватория РАН п. Нижний Архыз Россия Special Astrophysical Observatory RAS Nizhnij Arkhyz Russian Federation Южный федеральный университет Ростов-на-Дону Россия South Federal University Rostov-on-Don Russian Federation 12 2 89 95 07 11 2025 19 02 2026 https://naukaru.ru/en/nauka/article/122595/view

The NVGRC catalog includes objects selected by the pattern recognition algorithm from the NVSS survey as candidates for giant radio sources (GRS). We have studied in detail 370 NVGRC objects falling within the right ascension interval 00h00m–05h20m to confirm their GRS classification. The GLEAM, TGSS, RACS, and VLASS radio surveys were used to determine the radio morphology of the NVGRC objects; the LS, DES, UKIDSS, and WISE optical and infrared surveys, to identify their host galaxies; and the VizieR, NED, and NOAO DataLab databases, to determine their redshifts. This work would not have been possible without the information resources and software of the virtual observatory. Of the 370 NVGRC objects examined, 187 radio sources were classified as GRSs; 82 of them were previously known as GRS from publications. We have confirmed for the first time that 105 NVGRC objects are GRS. For 98 objects it turned out that their components were not physically connected and were merged into one radio source by a pattern recognition algorithm. We estimated the efficiency of the algorithm, used for selecting GRS candidates for the NVGRC catalog, at ≈30 %.

The NVGRC catalog includes objects selected by the pattern recognition algorithm from the NVSS survey as candidates for giant radio sources (GRS). We have studied in detail 370 NVGRC objects falling within the right ascension interval 00h00m–05h20m to confirm their GRS classification. The GLEAM, TGSS, RACS, and VLASS radio surveys were used to determine the radio morphology of the NVGRC objects; the LS, DES, UKIDSS, and WISE optical and infrared surveys, to identify their host galaxies; and the VizieR, NED, and NOAO DataLab databases, to determine their redshifts. This work would not have been possible without the information resources and software of the virtual observatory. Of the 370 NVGRC objects examined, 187 radio sources were classified as GRSs; 82 of them were previously known as GRS from publications. We have confirmed for the first time that 105 NVGRC objects are GRS. For 98 objects it turned out that their components were not physically connected and were merged into one radio source by a pattern recognition algorithm. We estimated the efficiency of the algorithm, used for selecting GRS candidates for the NVGRC catalog, at ≈30 %.

 active galactic nuclei giant radio sources astronomical information resources active galactic nuclei giant radio sources astronomical information resources

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