Bibliographic Details
| Title: |
The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to $z\sim6$ |
| Authors: |
Ceraj, Lana, Smolčić, Vernesa, Delvecchio, Ivan, Novak, Mladen, Zamorani, Giovanni, Delhaize, Jacinta, Schinnerer, Eva, Vardoulaki, Eleni, Ruiz, Noelia Herrera |
| Source: |
A&A 620, A192 (2018) |
| Publication Year: |
2018 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Astrophysics of Galaxies |
| More Details: |
We study a sample of 1,604 moderate-to-high radiative luminosity active galactic nuclei (HLAGN) selected at 3 GHz within the VLA-COSMOS 3 GHz Large Project. These were classified by combining multiple AGN diagnostics: X-ray data, mid-infrared data and broad-band spectral energy distribution fitting. We decompose the total radio 1.4 GHz luminosity ($\mathrm{L_{1.4\ GHz,TOT}}$) into the emission originating from star formation and AGN activity by measuring the excess in $\mathrm{L_{1.4\ GHz,TOT}}$ relative to the infrared-radio correlation of star-forming galaxies. To quantify the excess, for each source we calculate the AGN fraction ($\mathrm{f_{AGN}}$), the fractional contribution of AGN activity to $\mathrm{L_{1.4\ GHz,TOT}}$. The majority of the HLAGN, $(68.0\pm1.5)\%$, are dominated by star-forming processes ($f_{AGN}\leq0.5$), while $(32.0\pm1.5)\%$ are dominated by AGN-related radio emission ($0.50$).
Comment: 20 pages, 14 figures |
| Document Type: |
Working Paper |
| DOI: |
10.1051/0004-6361/201833935 |
| Access URL: |
http://arxiv.org/abs/1811.02966 |
| Accession Number: |
edsarx.1811.02966 |
| Database: |
arXiv |
