Further redshifts of 1-Jy radio sources
Abstract
We have firm redshifts for a further 12 faint radio source identifications from the '1-Jy' complete radio-selected sample, two of which are galaxies with redshifts z > 1.5. Another object has a provisional redshift that requires confirmation. Five of these identifications had previously been classified as QSOs on the basis of their optical morphology. Our spectroscopy shows that of these, one is definitely a galaxy and two have characteristics intermediate between those of 'normal' radio galaxies and those of 'normal' quasars, for instance broad Balmer emission but an extended optical image. Two of the eight identifications previously classified as galaxies have similar 'intermediate' properties. The remaining identifications have low-excitation narrow emission-line systems of the type seen in other 1-Jy radio sources by Allington-Smith et al. We confirm that the 1-Jy emission lines are a factor 2 weaker than those of 3C galaxies in the same redshift interval.
Additional Information
© 1988 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Based on data obtained at the Isaac Newton Group of Telescopes of the Roque de Los Muchachos Observatory, La Palma; Lick Observatory, University of California and the Multiple Mirror Telescope, a joint facility of the Smithsonian Institution and the University of Arizona. We thank Pat McCarthy, Kate Ebneter and Michael Strauss for assistance with the reduction of the Kitt Peak and Lick data and Hugo Schwarz, Alan Purvis and Ian Parry for assistance with the La Palma observations. We are grateful to the staff of the KPNO, Lick, MMT and La Palma observatories for their professional help in obtaining the data.Attached Files
Published - 1988MNRAS_234_1091A.pdf
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