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Multifrequency Study of GHz-peaked Spectrum Sources
Sotnikova, Yu, V1; Mufakharov, T., V2,3; Majorova, E. K.1; Mingaliev, M. G.1,2; Udovitskii, R. Yu1; Bursov, N. N.1; Semenova, T. A.1
2019-10-01
Source PublicationASTROPHYSICAL BULLETIN
ISSN1990-3413
Volume74Issue:4Pages:348-364
AbstractGigahertz-Peaked spectrum (GPS) sources are compact active galactic nuclei, presumably young precursors of bright radio sources. The study of GPS radio properties provides information about the features of synchrotron radiation in extragalactic sources. Also in applied research, GPS sources are useful as compact stationary radio sources in the sky for astrometric purposes. This paper presents the results of a multifrequency GPS study based on quasi-simultaneous measurements with the RATAN-600 radio telescope during the 2006-2017 period. A catalog of GPS spectral flux densities at six frequencies-1.1, 2.3, 4.8, 7.7/8.2, 11.2, and 21.7 GHz-is obtained. In addition, for the analysis of radio spectra, data from low-frequency surveys GLEAM(GaLactic and Extragalactic Allsky Murchison widefield array survey) and TGSS (Tata institute for fundamental research GMRT Sky Survey) and high-frequency measurements from Planck survey are used. A total number of 164 GPS and candidates have been identified (17 of them are new discoveries), which makes up a small fraction of GPS in the initial sample of bright AGNs-about 2%. The physical properties and formation conditions of synchrotron radiation is found to be quite different in GPS of different AGNs types. The deficit of distant GPS (z > 2) with low maximum frequencies (less than 1 GHz) has been confirmed. The existing "size-peak frequency" anticorrelation is continuous. The continuum radio spectra are found to become statistically steeper with increasing redshift.
Keywordradio continuum: galaxies galaxies: active, nuclei
Funding OrganizationMinistry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University ; Ministry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University ; Ministry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University ; Ministry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University
DOI10.1134/S1990341319040023
WOS KeywordCOMPACT STEEP-SPECTRUM ; VLBA CALIBRATOR SURVEY ; YOUNG RADIO-SOURCES ; HIGH-FREQUENCY PEAKERS ; RCR CATALOG ; GPS SOURCES ; SKY ; SAMPLE ; VARIABILITY ; CONSTRAINTS
Language英语
Funding ProjectMinistry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University
Funding OrganizationMinistry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University ; Ministry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University ; Ministry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University ; Ministry of Science and Higher Education of the Russian Federation ; Kazan (Volga region) Federal University
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000511836200002
PublisherMAIK NAUKA/INTERPERIODICA/SPRINGER
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54139
Collection中国科学院国家天文台
Corresponding AuthorSotnikova, Yu, V
Affiliation1.Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
2.Kazan Volga Reg Fed Univ, Kazan 420008, Russia
3.Shanghai Astron Observ, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Sotnikova, Yu, V,Mufakharov, T., V,Majorova, E. K.,et al. Multifrequency Study of GHz-peaked Spectrum Sources[J]. ASTROPHYSICAL BULLETIN,2019,74(4):348-364.
APA Sotnikova, Yu, V.,Mufakharov, T., V.,Majorova, E. K..,Mingaliev, M. G..,Udovitskii, R. Yu.,...&Semenova, T. A..(2019).Multifrequency Study of GHz-peaked Spectrum Sources.ASTROPHYSICAL BULLETIN,74(4),348-364.
MLA Sotnikova, Yu, V,et al."Multifrequency Study of GHz-peaked Spectrum Sources".ASTROPHYSICAL BULLETIN 74.4(2019):348-364.
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