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Cosmic evolution of AGN with moderate-to-high radiative luminosity in the COSMOS field

Published online by Cambridge University Press:  08 May 2018

L. Ceraj ,
V. Smolčić ,
I. Delvecchio ,
J. Delhaize  and
M. Novak
L. Ceraj
Affiliation:
University of Zagreb, Physics Department, Bijenička cesta 32, 10002 Zagreb, Croatia
V. Smolčić
Affiliation:
University of Zagreb, Physics Department, Bijenička cesta 32, 10002 Zagreb, Croatia
I. Delvecchio
Affiliation:
University of Zagreb, Physics Department, Bijenička cesta 32, 10002 Zagreb, Croatia
J. Delhaize
Affiliation:
University of Zagreb, Physics Department, Bijenička cesta 32, 10002 Zagreb, Croatia
M. Novak
Affiliation:
University of Zagreb, Physics Department, Bijenička cesta 32, 10002 Zagreb, Croatia
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Abstract

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We study the moderate-to-high radiative luminosity active galactic nuclei (HLAGN) within the VLA-COSMOS 3 GHz Large Project. The survey covers 2.6 square degrees centered on the COSMOS field with a 1σ sensitivity of 2.3 μJy/beam across the field. This provides the simultaneously largest and deepest radio continuum survey available to date with exquisite multi-wavelength coverage. The survey yields 10,830 radio sources with signal-to-noise ratios ≥5. A subsample of 1,604 HLAGN is analyzed here. These were selected via a combination of X-ray luminosity and mid-infrared colors. We derive luminosity functions for these AGN and constrain their cosmic evolution out to a redshift of z ∼ 6, for the first time decomposing the star formation and AGN contributions to the radio continuum emission in the AGN. We study the evolution of number density and luminosity density finding a peak at z ∼ 1.5 followed by a decrease out to a redshift z ∼ 6.

Keywords

Surveysgalaxies: generalactiveseparation: generalradio continuum: galaxiesX-rays: galaxies: AGN
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 195 - 198
Copyright
Copyright © International Astronomical Union 2018 

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