@article {371, title = {The Orientation of the Magnetic Field in Radio Sources}, journal = {Monthly Notices of the Royal Astronomical Society}, volume = {173}, year = {1975}, month = {11/1975}, pages = {53P-56P}, chapter = {53P}, abstract = {

Recent data on the polarization of extragalactic radio sources are used to investigate the distribution of Delta, the angle between the major axis of a source and the intrinsic position angle of the E vector of linear polarization. Previous work on this subject has led to widely divergent conclusions. It is found that sources of high radio luminosity usually have Delta near 90 deg, implying that the magnetic fields in such sources are oriented along the major axis. For radio galaxies with low luminosity, on the other hand, Delta tends to lie nearer zero deg.

}, keywords = {extragalactic radio sources, magnetic field configurations, polarization (waves), polarization characteristics, polarized electromagnetic radiation, radiant flux density, radio galaxies}, author = {Philip Haves and Robin G. Conway} } @article {375, title = {The Polarization of Radio Sources at 31 CM}, journal = {Monthly Notices of the Royal Astronomical Society}, volume = {169}, year = {1974}, month = {10/1974}, pages = {117-131}, chapter = {117}, abstract = {

Measurements of the linear polarization of extragalactic radio sources have been made over a range of wavelengths in order to study both the properties of the sources themselves and the Faraday rotation along the line of sight to the observer. As part of a continuing program of such measurements the flux densities and integrated polarizations of 226 sources (including 134 quasars) were observed at 966 MHz (lambda 31 cm), to complement previous measurements at lambda 49 and lambda 74 cm (Conway et al. 1972). These results have been combined with others at shorter wavelengths in a discussion of the polarization properties of quasars (Conway et al. 1974). All the sources have angular sizes of 1 arcmin or less

}, keywords = {Astronomical Catalogs, extragalactic radio sources, faraday effect, interferometry, microwave emission, polarized electromagnetic radiation, Quasars, radiant flux density, radio astronomy, statistical analysis, tables (data), very high frequencies}, author = {Philip Haves and Robin G. Conway and David Stannard} } @article {376, title = {The Radio Polarization of Quasars}, journal = {Monthly Notices of the Royal Astronomical Society}, volume = {168}, year = {1974}, month = {07/1974}, pages = {137-162}, chapter = {137}, abstract = {

Observations over a wide range of wavelengths, 2.2 <= λ <= 73 cm, have been combined to define the wavelength variation of the degree of linear polarization m(λ) for 120 quasars with known redshift. For the majority, m(λ) decreases monotonically with increasing wavelength but for 35 sources the polarization curve is inverted at short wavelengths. A classification is given, based on both the polarization curve and the radio spectrum, and the results are interpreted in terms of the presence or absence of opaque components in the source. The depolarization which occurs at long wavelengths is accounted for by a combination of spectral effects and Faraday depolarization. For 46 steep-spectrum sources the depolarization curve appears to be dominated by the Faraday effect, and has been used to deduce the electron density within the radiating components. In this group of sources the correlation between depolarization and redshift noted by Kronberg et al. is confirmed and strengthened. A discussion is given of some theoretical models of radio sources in the light of the depolarization data.

}, author = {Robin G. Conway and Philip Haves and Philipp P. Kronberg and David Stannard and Jacques P. Vall{\'e}e and John F. C. Wardle} }