A sample of 6C radio sources with virtually complete redshifts. II - optical spectroscopy

Abstract

This is the second of two papers presenting basic observational data on the 6CE sample of extragalactic radio sources. It presents the results of optical spectroscopy which has yielded virtually complete redshift information for the 6CE sample: 56 of the 59 sample members have spectroscopic redshifts which, with the exception of seven cases, are secure. The redshift distribution N(z) is fairly flat over the redshift range 0 < z < 2, with a median redshift of 1.1 and a high-redshift tail reaching to z = 3.4. The highest-redshift (z > 1.75) members of the 6CE sample have similar optical spectra and a tight (less than one dex) spread in narrow-Lyalpha emission line luminosity.

18 pages, 4 figures, accepted for publication in MNRAS

References in corpus (5)

• The emission line - radio correlation for radio sources using the 7C Redshift Survey
• The radio luminosity function from the low-frequency 3CRR, 6CE & 7CRS complete samples
• The quasar fraction in low-frequency selected complete samples and implications for unified schemes
• Radiative Precession of an Isolated Neutron Star
• Optical spectroscopy of two overlapping, flux-density-limited samples of radio sources in the North Ecliptic Cap, selected at 38 MHz and 151 MHz

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