Multifrequency observations of 40 powerful extragalactic sources with the 5-km telescope

Details Multifrequency observations of 40 powerful extragalactic sources with the 5-km telescope Multifrequency observations of 40 powerful extragalactic sources with the 5-km telescope

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..261l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 195, Apr. 1981, p. 261-324. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

149

Astronomical Maps, Extragalactic Radio Sources, Magnetic Field Configurations, Radiant Flux Density, Radio Astronomy, Astrometry, Linear Polarization, Quasars, Radio Galaxies, Radio Spectra, Radio Telescopes, Red Shift

Scientific paper

Forty powerful extended extragalactic radio sources selected from the 3C catalogue have been mapped at 2.7 and 15.4 GHz with the Cambridge 5-km telescope; a few new observations at 5.0 GHz are also presented. The results are given as contour and vector maps and as tables of component parameters. The high resolution of the 15 maps (0.67 arcsec in RA) has enabled hot-spots to be mapped in detail; multiple structure is shown to be very common. Observations of linear polarization at 2.7 GHz have been used to derive maps of percentage polarization and magnetic-field direction for 18 of the sources. The results have been combined with previously-published observations at 5.0 GHz in order to derive the spectral indices of hot.spots. For one source (3C 20), detailed distributions of spectral index, Faraday rotation and depolarization between 5.0 and 2.7 GHz have been derived.

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