Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198..673b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 198, Feb. 1982, p. 673-688.
Astronomy and Astrophysics
Astronomy
85
Astronomical Maps, Quasars, Radio Galaxies, Radio Interferometers, Radio Telescopes, Cores, Halos, Periodic Variations, Plasma Jets, Radiant Flux Density, Radio Spectra, Relativistic Effects, Spectral Resolution, X Ray Sources
Scientific paper
The Jodrell Bank MTRLI has been used to map nine flat-spectrum core-dominated radio sources at 408 MHz. Most of the sources consist of a compact core with a flat spectrum and an extended 'jet' component with a steeper spectrum. Evidence is presented that in several of the sources there is, in addition to the core and the jet which are visible on the maps, a halo component of relatively low brightness and very steep spectrum. The observations are interpreted within the framework of relativistic beam models and it is concluded that core-dominated quasars are most likely to be classical double radio quasars seen end-on. The diffuse halo is identified with the superposed outer lobes, and the jet with one of the relativistic beams transporting energy to the lobes.
Browne Ian W. A.
Davis Raymond Jr.
Foley Anthony
Muxlow Thomas W. B.
Orr J. L. M.
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