A Radio View of the Sky: the Cosmic History of Star-Forming and AGN Galaxies

Details A Radio View of the Sky: the Cosmic History of Star-Forming and AGN Galaxies A Radio View of the Sky: the Cosmic History of Star-Forming and AGN Galaxies

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..408..116s&link_type=abstract

The Starburst-AGN Connection. ASP Conference Series, Vol. 408, proceedings of the conference held 27-31 October 2008, at Shangha

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We explore the cosmic evolution of radio detected star forming (SF) galaxies and active galactic nuclei (AGN), drawn from the VLA-COSMOS survey, out to z=1.3. We present the 20 cm radio luminosity function for these populations, and find that SF galaxies evolve much more rapidly than low-power radio AGN. Our results imply that weak radio AGN ({L}1.4GHz ≲5×1025 W Hz-1) occur in the most massive galaxies already at z˜1. They may significantly contribute to the heating of their surrounding medium and thus inhibit gas accretion onto their host galaxies, as recently suggested for the `radio mode' AGN feedback in cosmological models.

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