Radio sources in the 6dFGS Virtual Observatory Resource

Authors
  1. Mauch T.
  2. Sadler E.M.
  3. Published by
    CDS
Abstract

We have identified 7824 radio sources from the 1.4GHz NRAO VLA Sky Survey (NVSS, Cat. <VIII/65>) with galaxies brighter than K=12.75mag in the Second Incremental Data Release of the 6 degree Field Galaxy Survey (6dFGS DR2, Cat. <VII/249>). The resulting sample of redshifts and optical spectra for radio sources over an effective sky area of 7076deg^2^ (about 17 per cent of the celestial sphere) is the largest of its kind ever obtained. NVSS radio sources associated with galaxies in the 6dFGS span a redshift range 0.003<z<0.3 and have median z{bar}=0.043. Through visual examination of 6dF spectra we have identified the dominant mechanism for radio emission from each galaxy. 60 per cent are fuelled by star formation and 40 per cent are fuelled by an active galactic nucleus (AGN) powered by a supermassive black hole. We have accurately determined the local radio luminosity function (RLF) at 1.4GHz for both classes of radio source and have found it to agree well with other recent determinations. From the RLF of star-forming galaxies we derive a local star formation density of 0.022+/-0.001M_{sun}_/yr/Mpc^3^, in broad agreement with recent determinations at radio and other wavelengths.

Keywords
  1. Surveys
  2. Radio sources
  3. Astronomical object identification
  4. Redshifted
Bibliographic source Bibcode
2007MNRAS.375..931M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/375/931
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/375/931

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/375/931
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/375/931
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/375/931
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/375/931/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/375/931/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/375/931/table3?

History

2008-01-08T10:27:58Z
Resource record created
2008-01-08T09:29:13Z
Updated
2008-01-08T10:27:58Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr