95 research outputs found
Catalog of Radio Galaxies with z>0.3. III: Angular Sizes and Flux Density According to the NVSS Data
We describe the procedure of the construction of a sample of distant
() 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
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)
© 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
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
and the redshift 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, , and
amplitude, = 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
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)
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
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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