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With the aim to extend a sample of the distant radio objects, about 100 steep spectrum FRII radio galaxies (SS FRII RG) from the RATAN—600 RC catalog were mapped by the VLA1 and identified with optical objects down to R = 24m − 25m with the 6 m telescope. The mean estimated redshift of SS FRII RGs from the RC list happened to be greater than 1.5. BV RI photometry was made, and by standard model fitting we have estimated “colour” redshift and the age of stellar population of the parent gE galaxy in 50 cases. Several objects were found in which active star formation began in the first billion of years after the Big Bang.
The project of the informational system creation on the problem of evolution of radio galaxies is described. This system, being developed at present, will allow a user to operate with simulated curves of spectral energy distributions (SED) and to estimate ages and redshifts by photometrical data. Planned modes of access, formats of output result and additional functions are described.
At the XVIth General Assembly, Commission 40 decided to curtail its triennial reports, confining them to aspects and developments which do not naturally find a place in the report of another commission. In letters to Presidents of eighteen commissions our new policy was explained and Commission 40 members willing to serve as radio astronomy contact person with one of these commissions were introduced. All Commission 40 members received notice of our intentions, with the names of the contact persons and an outline of this report in September 1978. We trust that from now on research at radio observatories will be integrally reported in the thematically appropriate reports of relevant commissions.
It is shown that multi-elements surface of the Russian biggest reflector may be considered as a 1000-element array with limited freedom of motions of each element. This limitation may be compensated by selection of the proper “virtual sub-array” of elements at any given direction of observations. This approach is especially effective for mm-waves where field of view of 600-meter reflector in usual mode is less than 1 arcsec. The present stage of realization of that project is shortly discussed, including requirements for multi-feed system near the focal plane of the radio telescope, wavelength limitations and error budget, and near field zone 3-dimensional synthesis mode of observation.
The radio galaxy RC J0311+0507 was investigated in the “Big Trio” project, which aims to
search for distant radio galaxies. Optical spectroscopy performed at the 6-m telescope
measured its redshift as 4.514. The source is one of the most luminous objects in the high
redshift Universe having L ≈ 3 × 1029W Hz-1 at 500 MHz, that
suggests the presence of a super massive black hole with a mass of about
1010M⊙ inside the parent galaxy. Mechanisms of
the formation of galaxies with black holes of such masses in the early stage of the
Universe is not yet clear. Based on a collection of deep images taken in 10 optical and
infrared bands we started a photometric study of the environment of this radio galaxy to
detect possible neighborhood.
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