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 deg2) 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, approximately five times fainter than the 7C Redshift Survey (7CRS), and contains 47 radio sources. We have obtained 40 spectroscopic redshifts (~85 per cent completeness). Adding redshifts estimated for the seven other cases yields a median redshift zmed ~ 1.25. We find a significant population of objects with Fanaroff-Riley type I (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 subpopulations of TOOT00 are broadly consistent with extrapolations from the 7CRS/6CE/3CRR data sets underlying the SKADS Simulated Skies Semi-Empirical Extragalactic Data base, S3-SEX.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- January 2010
- DOI:
- 10.1111/j.1365-2966.2009.15810.x
- arXiv:
- arXiv:0909.5691
- Bibcode:
- 2010MNRAS.401.1709V
- Keywords:
-
- galaxies: active;
- galaxies: evolution;
- galaxies: formation;
- galaxies: jets;
- galaxies: luminosity function;
- mass function;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- Accepted for publication in MNRAS