Abstract
Spectrophotometric observations are presented for three N galaxies identified with the radio sources PKS 0353+027, 3C 99 (PKS 0358+00), and 3C 467 (PKS 2345+18). The systems are spectroscopically similar, showing high excitation and relatively rich emission-line spectra with redshifts of 0.602, 0.426, and 0.631, respectively. the object 3C 467 is observed to have small but significant difference between emission-line redshifts computed from forbidden and permitted lines, corresponding to a velocity difference of 300 kms s/sup -1/. PKS 0353+027 and 3C 467 are quite similar to the N system 3C 411 showing strong Mg ii lambda2799 which is considerably broader than the Balmer lines observed. Consideration of the O/H ratio derived from the ratios of the (O iii) lines and H..beta.. leads us to the conclusion that the nuclei of these galaxies must have electron densities n/sube/approximately-greater-than10/sup 6/ and T/sube/approx. =10,000 K unless the oxygen abundance is exceedingly low. The equivalent widths of H..beta.. for these systems are consistent with excitation by photoionization from the observed optical nonthermal continuum extrapolated to ionizing energies. The calculated absolute magnitudes for PKS 0353+027, 3C 99, and 3C 467 range from values for normal first-ranked cluster galaxies up to the lower luminosity quasi-stellar objects. (AIP)
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