Abstract
THE radio source 3C273 was one of the first to be identified1 with a QSO. The main features of the brightness distribution have been established from lunar occupation studies2–5, which show that the source is double, with one component coincident with a 13 mag QSO or redshift 0.158. This component, 3C273B, is variable, and has an inverted radio spectrum. The component is compact, and details of its structure have been investigated with inter-continental (VLBI) interferometers6–8. The other component, 3C273A, has a normal radio spectrum and is identified with a faint optical jet lying in position angle 223° with respect to the QSO. Component A has extended radio structure, and is not detected in VLBI observations8. The colours of the jet indicate that the optical emission, like the radio emission from component A, is non-thermal9,10. The optical jet of 3C273 is an extremely unusual feature, and it would be interesting to make a detailed comparison of the optical and radio structure associated with the component. We provide here detailed information of the radio brightness distribution.
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CONWAY, R., STANNARD, D. Radio brightness distribution of 3C273. Nature 255, 310–312 (1975). https://doi.org/10.1038/255310a0
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DOI: https://doi.org/10.1038/255310a0
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