A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - I. Radio imaging, multicolour photometry and spectroscopy

E. E. Rigby, I. A. G. Snellen, P. N. Best

Research output: Contribution to journalArticlepeer-review

Abstract

With the goal of identifying high- redshift radio galaxies with Fanaroff - Riley class I ( FR I) classification, here are presented high- resolution, wide- field radio observations, near- infrared and optical imaging and multi- object spectroscopy of two fields of the Leiden - Berkeley Deep Survey. These fields, Hercules. 1 and Lynx. 2, contain a complete sample of 81 radio sources with S-1.4GHz > 0.5 mJy within 0.6 deg(2). This sample will form the basis for a study of the population and cosmic evolution of high- redshift, low- power, FR I radio sources which will be presented in Paper II. Currently, the host galaxy identification fraction is 86 per cent with 11 sources remaining unidentified at a level of r' >= 25.2 mag ( Hercules; four sources) or r'>= 24.4 mag (Lynx; seven sources) or K greater than or similar to 20 mag. Spectroscopic redshifts have been determined for 49 per cent of the sample and photometric redshift estimates are presented for the remainder of the sample.

Original languageEnglish
Pages (from-to)1449-1466
Number of pages18
JournalMonthly Notices of the Royal Astronomical Society
Volume380
Issue number4
DOIs
Publication statusPublished - 1 Oct 2007

Keywords

  • galaxies : active
  • galaxies : distances and redshifts
  • galaxies : evolution
  • galaxies : photometry
  • radio continuum : galaxies
  • DIGITAL-SKY-SURVEY
  • ACTIVE GALACTIC NUCLEI
  • DEEP WESTERBORK SURVEY
  • 7C REDSHIFT SURVEY
  • LUMINOSITY FUNCTION
  • COSMOLOGICAL EVOLUTION
  • STANDARD STARS
  • HUBBLE DIAGRAM
  • EMISSION-LINE
  • GALAXIES

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