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

Autori
Ceraj, L. ; Smolčić, V. ; Delvecchio, I. ; Delhaize, J. ; Novak, M.

Izvornik
Proceedings of the International Astronomical Union (1743-9213) 12 (2017), S333; 195-198

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Surveys ; galaxies: general, active ; separation: general ; radio continuum: galaxies ; X-rays: galaxies: AGN

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA