93 research outputs found

    Optical morphology of distant RATAN-600 radio galaxies from subarcsecond resolution NOT images

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    We present direct imaging data of 22 ultra steep spectrum radio sources obtained at (or near) a subarcsecond seeing. The basic sample of 40 double radio sources was selected from the RATAN-600 catalogue. The FRII-structure has been confirmed with VLA and preliminary optical identifications which come from the 6 m-telescope. As the RATAN-600 flux limit at 3.9 GHz (≈\approx 10mJy) is fainter than that of major surveys, the sample may have high-zz contents. This is also suggested by the faint magnitudes in the Hubble diagram. The final aim is to create a homogeneous sample of high-zz radio galaxies in a well defined strip around the sky, with faint radio limit and subarcsecond morphology down to mR=24m_{R}=24. We could confirm 16 identifications down to mR∼m_{R}\sim24. Most of the extended objects have multicomponent structures as expected from other surveys of high-redshift radio galaxies. We found five unresolved objects even with a subarcsecond seeing. Of the remaining six objects, three are extremely faint and the other three have such a complex environment that further observations are needed to confirm the optical identification.Comment: A&AS in pres

    COMPARATIVE CHARACTERISTICS OF MODELS OF STATE SUPPORT FOR NATIONAL ECONOMIES OF THE WORLD IN THE CONTEXT OF THE COVID-19 PANDEMIC

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    The article describes economic and social problems of different countries resulting from the spread of the COVID-19 pandemic. The paper defines general and specific characteristics of economic difficulties in developed and developing countries. The authors carry out a preliminary analysis of the economic and social consequences of the coronavirus pandemic for the global economy as a whole. The study presents a comparative description of approaches to the formation of state financial support for businesses and households in developed countries of the European Union, China and Russia. The article identifies two main models of state support – push/pull, shows their differences in the amount of funds, the breadth of coverage of final recipients, the availability of benefits, and the degree of bureaucratization of procedures. The paper reveals the rules and procedures for providing state events to support businesses and entrepreneurs on the Russian market, and also uncovers shortcomings that significantly affected the economic situation of agents. The authors describe the consequences of lockdown for the economies of various countries. The study conducts a screen analysis of health systems and their mobilization response to the spread of coronavirus infection. The paper draws conclusions about the advantages of proactive social support for the population and business, the need to increase its targeting and the spread of effective practices in the future

    RC J1148+0455 identification: gravitational lens or group of galaxies ?

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    The structure of the radio source RC B1146+052 of the ``Cold'' catalogue is investigated by data of the MIT-GB-VLA survey at 4850 MHz. This source belongs to the steep spectrum radio sources subsample of the RC catalogue. Its spectral index is α\alpha = -1.04. The optical image of this source obtained with 6m telescope is analysed. The radio source center is situated in a group of 8 galaxies of about 24m^m in the R-filter. The possible explanations of the complex structure of radio components are considered.Comment: 6 pages, 5 figures, uses psfig.sty. This was the poster as presented on Gamow Memorial Internat. Conference GMIC'99 "Early Universe: Cosmological Problems and Instrumental Technologies" in St.Petersburg, 23-27 Aug., 1999. Submitted to Proceedings to be published in A&A Transaction
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