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Search and study of objects of the early universe

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Abstract

The “Big Trio” program is conducted at the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) aiming to investigate a sample of sources with steep and ultra-steep spectra fromthe RCcatalog obtained on the basis of observational data of the “Cold” survey. The population of distant FRII type radio galaxies with steep spectra is of particular interest, since new data indicate the presence of black holes with masses of more than 109 M ⊙ which already formed in these giant stellar systems in the first billion years of life of the Universe, as well as their connection with emerging clusters. There are three sources with z sp > 3 in the sample. According to the observations of the 6-m SAO RAS telescope, the archival data of Subaru and Spitzer, an increased density of objects and several Lyα-emitters have been detected near one of the most powerful radio galaxies, RCJ0311+0507 (4C+04.11) with z = 4.51, which is the second most distant of the known FRII-type galaxies. Another object— RCJ1740+0502 with z = 3.57, is a possible dual AGN candidate. The third source, RCJ0105+0501, is an FRII-type galaxy (z = 3.138) with a host galaxy of a complex structure, possibly generated by interaction in a close pair of galaxies. These radio sources have high radio luminosity (L 500MHz ≈ 1028–1029WHz−1), which requires the presence of a giant black hole with a sufficient accretion rate, and also with a rapid rotation, which in turn can be provided by major merging.

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Authors and Affiliations

  1. St. Petersburg Branch of the Special Astrophysical Observatory of the Russian Academy of Sciences, St.Petersburg, 196140, Russia

    Yu. N. Parijskij & A. V. Temirova

  2. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia

    O. P. Zhelenkova, A. I. Kopylov, O. V. Verhodanov & V. N. Komarova

  3. ITMO University, St. Petersburg, 197101, Russia

    O. P. Zhelenkova

Authors
  1. Yu. N. Parijskij
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  2. O. P. Zhelenkova
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  3. A. I. Kopylov
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  4. A. V. Temirova
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  5. O. V. Verhodanov
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  6. V. N. Komarova
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Correspondence to O. P. Zhelenkova.

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Original Russian Text © Yu.N. Parijskij, O.P. Zhelenkova, A.I. Kopylov, A.V. Temirova, O.V. Verhodanov, V.N. Komarova, 2017, published in Astrofizicheskii Byulleten’, 2017, Vol. 72, No. 2, pp. 103–110.

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Parijskij, Y.N., Zhelenkova, O.P., Kopylov, A.I. et al. Search and study of objects of the early universe. Astrophys. Bull. 72, 93–99 (2017). https://doi.org/10.1134/S1990341317020018

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  • DOI: https://doi.org/10.1134/S1990341317020018

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