Radio and optical structure of Cygnus A

Details Radio and optical structure of Cygnus A Radio and optical structure of Cygnus A

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977aj.....82..315k&link_type=abstract

Astronomical Journal, vol. 82, May 1977, p. 315-318. Research supported by the National Research Council of Canada.

Astronomy and Astrophysics

Astronomy

38

Astrometry, Optical Measurement, Radio Sources (Astronomy), Visual Observation, Position (Location), Radiant Flux Density, Radio Astronomy

Scientific paper

Recent astrometric measurements show that the central compact radio source in Cyg A is situated between the brightest part of the continuum object and the boomerang-shaped emission region described in a previous paper. This location places the compact source at the center of symmetry of the cD envelope of the parent galaxy. Two of the three radio-bright compact components embedded in the outer lobes of Cyg A have no optical counterpart at their peaks of radio brightness. This observation implies that any optical object coinciding with the two strongest outer compact radio components must be fainter than a J magnitude of about -14 + 5 log (H/100). The area of sky covered by the more extended radio emission is too large, considering the high density of optical field objects, to enable any further firm conclusions on radio-optical associations.

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