The TexOx-1000 redshift survey of radio sources I: the TOOT00 region

Abstract

We present optical spectroscopy, near-infrared (mostly K-band) and radio (151-MHz and 1.4-GHz) imaging of the first complete region (TOOT00) of the TexOx-1000 (TOOT) redshift survey of radio sources. The 0.0015-sr (~ 5 deg^2) TOOT00 region is selected from pointed observations of the Cambridge Low-Frequency Survey Telescope at 151 MHz at a flux density limit of ~= 100 mJy, ~ 5-times fainter than the 7C Redshift Survey (7CRS), and contains 47 radio sources. We have obtained 40 spectroscopic redshifts (~ 85% completeness). Adding redshifts estimated for the 7 other cases yields a median redshift z_med ~ 1.25. We find a significant population of objects with FRI-like radio structures at radio luminosities above both the low-redshift FRI/II break and the break in the radio luminosity function. The redshift distribution and sub-populations of TOOT00 are broadly consistent with extrapolations from the 7CRS/6CE/3CRR datasets underlying the SKADS Simulated Skies Semi-Empirical Extragalactic Database, S^3-SEX.

Accepted for publication in MNRAS; 59 pages, 10 figures, 6 tables

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• The environments of z~1 Active Galactic Nuclei at 3.6um
• The nature of faint radio galaxies at high redshifts
• Black-hole masses, accretion rates and hot- and cold-mode accretion in radio galaxies at z~1
• Observational evidence that positive and negative AGN feedback depends on galaxy mass and jet power
• Evidence of different star formation histories for high- and low-luminosity radio galaxies
• FR-type radio sources at 3 GHz VLA-COSMOS: Relation to physical properties and large-scale environment
• The evolution of the Fundamental Plane of radio galaxies from z~0.5 to the present day
• Evidence for cosmic evolution in the spin of the most massive black holes
• Quasar emission lines, radio structures and radio unification