Interferometer observations of quasars from the Jodrell Bank 966-MHz survey

Details Interferometer observations of quasars from the Jodrell Bank 966-MHz survey Interferometer observations of quasars from the Jodrell Bank 966-MHz survey

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aj.....83.1009o&link_type=abstract

Astronomical Journal, vol. 83, Sept. 1978, p. 1009-1020.

Astronomy and Astrophysics

Astronomy

65

Microwave Interferometers, Quasars, Radio Astronomy, Ultrahigh Frequencies, Astronomical Coordinates, Radiant Flux Density, Superhigh Frequencies, Tables (Data), Visual Observation

Scientific paper

Results are reported for interferometric observations of 68 Jodrell Bank radio quasars identified with stellar objects no fainter than a blue magnitude of 19.0. The observations were performed with a four-element interferometer at frequencies of 2695 and 8085 MHz. Analyses are performed with respect to radio-optical positional agreement, angular sizes, visibilities, properties of sources larger than 10 arcsec, and optical magnitudes. It is found that: (1) most, if not all, of the 30 quasars larger than 10 arcsec are triple; (2) 29 such sources have identifiable extended structure on either side of the optical identification; (3) this extended structure is usually concentrated in compact components; (4) at least 24 of the 30 larger sources have a compact central component coincident with the optical image; and (5) most, if not all, radio quasars have nuclear emission above 1% of their total flux density at 2695 MHz. A close connection is suggested between the central component and the quasar optical continuum.

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