95 research outputs found

    Catalog of Radio Galaxies with z>0.3. III: Angular Sizes and Flux Density According to the NVSS Data

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    We describe the procedure of the construction of a sample of distant (z>0.3z>0.3) radio galaxies using the NED, CATS and SDSS databases for further use in various statistical tests. We believe the sample to be free of objects with quasar properties. This paper is the third part of the description of the radio galaxies catalog that we plan to use for cosmological tests. We report the results of the sample of angular sizes for the NVSS survey list objects, and its preliminary statistical analysis. Three-parameter diagrams "angular size-redshift-flux density" and "angular size-redshift-spectral index", and their two-parameter projections are constructed. Three subsamples of radio galaxies are separated in the "source size--flux density" diagram.Comment: 6 pages, 4 figures, 1 tabl

    The estimation of black-hole masses in distant radio galaxies

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    We have estimated the masses of the central supermassive black holes of 2442 radio galaxies from a catalog. Mass estimates based on optical photometry and radio data are compared. Relationships between the mass of the central black hole Mbh p and the redshift zp are constructed for both wavelength ranges (radio and optic). Upper-envelope cubic regression fits are obtained using the maximum estimates of the black-hole masses. The optical and radio upper envelopes show similar behavior, and have very similar peaks in position, zp ≃ 1:9 and amplitude, log M bh p =9.4. This is consistent with a model in which the growth of the supermassive black holes is self-regulating, with this redshift corresponding to the epoch when the accretion-ow phase begins to end and the nuclear activity falls off

    The phenomenon of historical and confessional study of the peoples in the middle volga region, the urals and Siberia in Kazan theological academy (the second half of the xix - The beginning of the XX centuries)

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    © Serials Publications.The topical character of the theme under investigation is determined by aspiration of the local and foreign researchers for studying problems having great importance for the investigation of the origin of modern international and inter-confessional relations in the Republic of Tatarstan, Russian Federation and Europe as a whole. The object of the paper is to investigate a unique phenomenon of historical and confessional study of the peoples in the Middle Volga region, the Urals and Siberia in Kazan Theological Academy in the second half of the XIX-The beginning of the XX centuries. A leading approach of this research is to present the teachers-missionaries as scientists who had contributed much to the study of history, culture, ethnography and the language of the Turkic, Finno-Ugric, Mongolian peoples. The authors managed to reveal the scientific and educational activities of the missionary department of Kazan Theological Academy, the only one of its kind in Russia, to find out the contribution of its teachers to the study of the peoples in the Middle Volga region, the Urals and Siberia, to find out in the archives different documents (historical, linguistic, ethnographic) concerning the Tatars, the Mari, the Chuvash, the Bashkirs, the Udmurts, the Mordovians, and Siberians. The materials of the paper can be beneficial for anyone interested in the empire, nation, religion and Orthodox missionary policy phenomenon and modern ethno-political processes in the Russian Federation and Europe

    The estimation of black-hole masses in distant radio galaxies

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    We have estimated the masses of the central supermassive black holes of 2442 radio galaxies froma catalog compiled using data from the NED, SDSS, and CATS databases. Mass estimates based on optical photometry and radio data are compared. Relationships between the mass of the central black hole MpbhM_p^{bh} and the redshift zpz_p are constructed for both wavelength ranges. The distribution of the galaxies in these diagrams and systematic effects influencing estimation of the black-hole parameters are discussed. Upperenvelope cubic regression fits are obtained using the maximum estimates of the black-hole masses. The optical and radio upper envelopes show similar behavior, and have very similar peaks in position, zp1.9z_p \simeq 1.9, and amplitude, logMpbh\log M_p^{bh} = 9.4. This is consistent with a model in which the growth of the supermassive black holes is self-regulating, with this redshift corresponding to the epoch when the accretion-flow phase begins to end and the nuclear activity falls off.Comment: 8 pages, 6 figure

    Statistics of WMAP ILC map temperature fluctuations towards distant radio galaxies

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    For 2442 galaxies of the catalog, compiled based on the NED, SDSS, and CATS survey data with redshifts z, > 0.3 we conducted an analysis of the amplitude of temperature fluctuations in the cosmic microwave background (CMB) in the points, corresponding to the direction to these objects. To this end, we used the ILC map from the WMAP mission seven-year data release. We have estimated the dipole component of the background and tested the hypothesis of Kashlinsky on the existence of a "dark bulk flow", determined for the estimated dipole component of the CMB WMAP by the value of the CMB anisotropy in the direction to the clusters of galaxies. We show that the amplitude of this dipole T max = 0.012mK is located within the {\sigma} interval, estimated by Monte Carlo simulations for the Gaussian fluctuations of the CMB signal in the {\Lambda}CDM model. The low amplitude of the dipole indicates that it is impossible to confirm this hypothesis from the WMAP data. In addition, we studied the statistics of the fluctuation amplitude of the microwave signal in the direction to radio galaxies. A weakening of the absolute value of the mean signal in the corresponding fields was discovered.Comment: 7 pages,4 figures,1 tabl

    Dialogue and communication in interliterary process: (The study of Russian - Tatar literary interconnections of the first half of the XX century)

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    The paper deals with the problem of literary interconnections in Tatar and Russian. The notions of dialogue and communication are regarded as two types of literary interconnections. The diachronic studies of the poetical translations of Russian classics encompass a wide variety of approaches. The dialogical approach to the translations dated back to the beginning of the XX century can be traced in the free attitude of Tatar poets to the translated texts. The strategy of the accurate translation was developed in the frames of the communicative approach in 1930s. The approaches mentioned above are revealed in the critical articles, which, dealing with the problem of literary interconnections in Tatar and Russian, estimate the correlations between the oeuvre of Russian and Tatar writers in a variety of ways. G.Kutuy's critical articles clearly demonstrate the dialogical and communicative approaches. The dialogical interpretation of literary interconnections is based on the idea of equality in national literatures

    On the Spectral Index of Distant Radio Galaxies

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    The problems of using the spectral index of radio galaxies in various tests, in particular, in selecting distant radio sources are considered. The history of the question of choosing a criterion of searching for distant radio galaxies based on the spectral index is presented. For a new catalog of 2442 radio galaxies constructed from NED, SDSS, and CATS data, an analytical form of the sp ectral index.redshift relation has been determined for the first time. The spectral index.angular size and spectral index.flux density diagrams have also been constructed. Peculiarities of the distribution of sources on these diagrams are discussed.Comment: 7 pages,5 figure
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