Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...137..250h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 137, no. 2, Aug. 1984, p. 250-254.
Astronomy and Astrophysics
Astronomy
Galactic Structure, Radio Astronomy, Radio Galaxies, Brightness Distribution, Radio Telescopes, Spectral Resolution
Scientific paper
Observations have been made of the strong radio galaxy 3C123 at 21-cm wavelength with the 305-m telescope at Arecibo and the Westerbork Synthesis Radio Telescope in its high-dynamic-range configuration in a search for evidence that 3C123 may indeed be associated with several of the nearby weak sources first observed by Reich et al. (1976) in high-dynamic-range observations made with the 100-m telescope at Effelsberg. Such an association, if real, would imply a total source extent in excess of 10 Mpc and would make 3C123 the largest known radio source. The present observations, however, do not support this interpretation. No direct evidence is found for a physical connection between 3C123 itself and any of the nearby weak sources, nor is any statistical evidence found from the number counts in the region for an enhanced population of sources in the region. If 3C123 is indeed a giant radio galaxy, its properties are very unlike those of the other well-known giant radio sources.
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