Radio imaging of the Subaru/XMM-Newton Deep Field -I. The 100-μJy catalogue, optical identifications, and the nature of the faint radio source population

Chris Simpson, Alejo Martínez-Sansigre, Steve Rawlings, Rob Ivison, Masayuki Akiyama, Kazuhiro Sekiguchi, Tadafumi Takata, Yoshihiro Ueda, Mike Watson

Research output: Contribution to journalArticlepeer-review

187 Citations (Scopus)

Abstract

We describe deep radio imaging at 1.4 GHz of the 1.3-deg 2 Subaru/XMM-Newton Deep Field (SXDF), made with the Very Large Array in B and C configurations. We present a radio map of the entire field, and a catalogue of 505 sources covering 0.8 deg 2 to a peak flux density limit of 100 μJy. Robust optical identifications are provided for 90 per cent of the sources, and suggested identifications are presented for all but 14 (of which seven are optically blank, and seven are close to bright contaminating objects). We show that the optical properties of the radio sources do not change with flux density, suggesting that active galactic nuclei (AGN) continue to contribute significantly at faint flux densities. We test this assertion by cross-correlating our radio catalogue with the X-ray source catalogue and conclude that radio-quiet AGN become a significant population at flux densities below 300 μJy, and may dominate the population responsible for the flattening of the radio source counts if a significant fraction of them are Compton-thick.

Original languageEnglish
Pages (from-to)741-757
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume372
Issue number2
DOIs
Publication statusPublished - 2006 Oct

Keywords

  • Catalogues
  • Galaxies: active
  • Radio continuum: galaxies
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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