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The series of works "Multiwavelength investigation of galaxies and active galactic nuclei on the basic of the nearby and distant sky surveys"

Work number - M 73 AWARDED


         The series of works consist of 34 scientific papers and 18 abstracts, published during years 2004 — 2013, 24 works were published in the journals with non-zero impact factor. The works were cited in more than 35 scientific journals, general citation index of publications is 41 (according to SCOPUS base date), h-index = 4.

                The methods of defining galaxy groups and isolated galaxies using Voronoi tessellation technique of the first and higher orders were proposed for the first time in the series of works. The methods were applied to the galaxy sample of the Local Supercluster  and sample of galaxies with radial velocities up to 10 000 km/s.

         Two catalogs of isolated galaxies were compiled, for the moment they are unique source of the systematic observational data about the Local Universe. On the basic of a comparison of the morphological content of the samples of isolated galaxies with the population of small populated groups it was found that the fraction of early type galaxies in groups is larger. However for the equal morphological types the differences were also found: the isolated galaxies have bluer colour than the galaxies in groups (except galaxies in the interacting pairs where the starforming processes occur). Thus elliptical galaxies in different environments have the same colour. It was found that galaxies in different environments and with different activity have the same levels of star formation rates. The existence of the same star formation limit for all galaxy types was confirmed.

  The content and distribution of the dark matter on the small galaxy group scales (0.1 – 1 Мpc) were determined. It was found that the dark matter is concentrated to the halo of individual galaxies rather than to the halo of galaxy groups (except the compact virialized groups).

   The data of the deep multiwavelength survey XMM-LSS were published and the investigation of the active galactic nuclei (AGN) environments were made for the first time.It was shown that different types of AGN are located in any kind of environment but they prefer the overdense one (galaxy groups). This result is in agreement with the unified scheme of AGN. However it was shown that the environments of the AGN type 1 and 2 differently evolve with redshift. Using photometric data in different wavelengths, the photometric redshifts were calculated for 5142 X-ray sources of the XMM-LSS survey. Among these objects three perspective candidates to the gravitational lens systems were found.