The Evolution of the Low-Frequency Radio AGN Population to $z\simeq 1.5$ in the ELAIS N1 Field

Abstract

We study the cosmic evolution of radio sources out to $z\simeq 1.5$ using a GMRT 610 MHz survey covering $\sim$1.86 deg${}^2$ of the ELAIS N1 field with a minimum/median rms noise 7.1/19.5\,$\mu$Jy / beam and an angular resolution of 6\,arcsec. We classify sources as star forming galaxies (SFGs), radio-quiet (RQ) and radio-loud (RL) Active Galactic Nuclei (AGN) using a combination of multi-wavelength diagnostics and find evidence in support of the radio emission in SFGs and RQ AGN arising from star formation, rather than AGN-related processes. At high luminosities, however, both SFGs and RQ AGN display a radio excess when comparing radio and infrared star formation rates. The vast majority of our sample lie along the $\mathrm{SFR}-{\mathrm{M}}_{\star }$ "main sequence" at all redshifts when using infrared star formation rates. We derive the 610 MHz radio luminosity function for the total AGN population, constraining its evolution via continuous models of pure density and pure luminosity evolution with ${\mathrm{\Phi }}^{\star }\propto (1+\mathrm{z}{)}^{(2.25\pm 0.38)-(0.63\pm 0.35)\mathrm{z}}$ and ${\mathrm{L}}_{610\mathrm{MHz}}\propto (1+\mathrm{z}{)}^{(3.45\pm 0.53)-(0.55\pm 0.29)\mathrm{z}}$ respectively. For our RQ and RL AGN, we find a fairly mild evolution with redshift best fitted by pure luminosity evolution with ${\mathrm{L}}_{610\mathrm{MHz}}\propto (1+\mathrm{z}{)}^{(2.81\pm 0.43)-(0.57\pm 0.30)\mathrm{z}}$ for RQ AGN and ${\mathrm{L}}_{610\mathrm{MHz}}\propto (1+\mathrm{z}{)}^{(3.58\pm 0.54)-(0.56\pm 0.29)\mathrm{z}}$ for RL AGN. The 610 MHz radio AGN population thus comprises two differently evolving populations whose radio emission is mostly SF-driven or AGN-driven respectively.

arXiv comment20 pages, 14 figures, Accepted for publication in MNRAS

References in corpus (82)

• emcee: The MCMC Hammer
• Galactic Stellar and Substellar Initial Mass Function
• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• The physical properties of star forming galaxies in the low redshift universe
• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• LOFAR: The LOw-Frequency ARray
• The broken hierarchy of galaxy formation
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• The Herschel-SPIRE instrument and its in-flight performance
• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• UV Star Formation Rates in the Local Universe
• The reversal of the star formation-density relation in the distant universe
• Multiwavelength study of massive galaxies at z~2. I. Star formation and galaxy growth
• CIGALE: a python Code Investigating GALaxy Emission
• Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars
• An Observational Determination of the Bolometric Quasar Luminosity Function
• Radio Properties of Infrared Selected Galaxies in the IRAS 2 Jy Sample
• Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey
• The lesser role of starbursts for star formation at z=2
• Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey
• Identifying Luminous AGN in Deep Surveys: Revised IRAC Selection Criteria
• Quasars, their host galaxies, and their central black holes
• The Chandra COSMOS Legacy survey: overview and point source catalog
• Radio sources in the 6dFGS: Local luminosity functions at 1.4 GHz for star-forming galaxies and radio-loud AGN
• The Difference between Radio-Loud and Radio-Quiet Active Galaxies
• A semi-empirical simulation of the extragalactic radio continuum sky for next generation radio telescopes
• Photometric Redshifts for Hyper Suprime-Cam Subaru Strategic Program Data Release 1
• The Far- and Mid-Infrared/Radio Correlations in the Spitzer Extragalactic First Look Survey
• A Cosmic Variance Cookbook
• Star Formation at $4<z<6$ From the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)
• The faint radio sky: radio astronomy becomes mainstream
• The 2dF-SDSS LRG and QSO (2SLAQ) Luminous Red Galaxy Survey
• The VLA-COSMOS 3~GHz Large Project: AGN and host-galaxy properties out to z$\lesssim$6
• Quantifying cosmic variance
• The sub-mJy radio sky in the Extended Chandra Deep Field South: source population
• Cosmic evolution of radio selected active galactic nuclei in the COSMOS field
• How Do Star-Forming Galaxies at Z>3 Assemble Their Masses?
• The VLA-COSMOS 3~GHz Large Project: Cosmic evolution of radio AGN and implications for radio-mode feedback since z~5
• The VLA Survey of the Chandra Deep Field South. V. Evolution and Luminosity Functions of sub-mJy radio sources and the issue of radio emission in radio-quiet AGN
• The Tiered Radio Extragalactic Continuum Simulation (T-RECS)
• Radio faint AGN: a tale of two populations
• The faintest Seyfert radio cores revealed by VLBI
• HELP: XID+, The Probabilistic De-blender for Herschel SPIRE maps
• On the two main classes of Active Galactic Nuclei
• High--frequency predictions for number counts and spectral properties of extragalactic radio sources. New evidences of a break at mm wavelengths in spectra of bright blazar sources
• HELP: modelling the spectral energy distributions of Herschel detected galaxies in the ELAIS N1 field
• The Two-Component Radio Luminosity Function of QSOs: Star Formation and AGN
• No Evolution in the IR-Radio Relation for IR-Luminous Galaxies at z<2 in the COSMOS Field
• Anticipated Performance of the Square Kilometre Array -- Phase 1 (SKA1)
• Galaxy Evolution in the Radio Band: The Role of Starforming Galaxies and Active Galactic Nuclei
• The radio AGN population dichotomy: Green valley Seyferts versus red sequence low-excitation AGN
• The VLA Survey of the Chandra Deep Field South. IV. Source Population
• Deep multi-frequency radio imaging in the Lockman Hole using the GMRT and VLA: II. The spectral index of submillimetre galaxies
• Radio galaxies in the 2SLAQ Luminous Red Galaxy Survey: I. The evolution of low-power radio galaxies to z~0.7
• Simulating the Spitzer mid-IR color-color diagrams
• A Different Approach to Galaxy Evolution
• A model for the cosmological evolution of low frequency radio sources
• Star formation properties of sub-mJy radio sources
• HELP: A catalogue of 170 million objects, selected at 0.36-4.5 $\mu$m, from 1270 deg.${}^2$ of prime extragalactic fields
• The evolving relation between star-formation rate and stellar mass in the VIDEO Survey since $z=3$
• Radio-Quiet Quasars in the VIDEO Survey: Evidence for AGN-powered radio emission at S_1.4GHz < 1 mJy
• The MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey
• Evolution of faint radio sources in the VIDEO-XMM3 field
• The 1.4 GHz radio properties of hard X-ray selected AGN
• Evidence that the AGN dominates the radio emission in z ~ 1 radio-quiet quasars
• Radio Polarimetry of the ELAIS N1 Field: Polarized Compact Sources
• The Quest for Dusty Star-forming Galaxies at High Redshift z>4
• The Main Sequences of Starforming Galaxies and Active Galactic Nuclei at High Redshift
• Revised SWIRE photometric redshifts
• The Deep SWIRE Field. IV. First properties of the sub-mJy galaxy population: redshift distribution, AGN activity and star formation
• Galaxy And Mass Assembly (GAMA): The 325 MHz Radio Luminosity Function of AGN and Star Forming Galaxies
• The evolutionary connection between QSOs and SMGs: molecular gas in far-infrared luminous QSOs at z ~ 2.5
• The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to $z\sim 6$
• Does the evolution of the radio luminosity function of star-forming galaxies match that of the star-formation rate function?
• Deep GMRT 610 MHz Observations of the ELAIS N1 Field : Catalogue and Source Counts
• Cosmic evolution of star-forming galaxies to $z\simeq 1.8$ in the faint low-frequency radio source population
• The Evolution of Radio Galaxies at Intermediate Redshift
• A Wide-area GMRT 610~MHz survey of ELAIS N1 field
• Polarized Radio Sources: A Study of Luminosity, Redshift and Infrared Colors
• The Nature of the Faint Low-Frequency Radio Source Population
• A mixture evolution scenario of the AGN radio luminosity function
• What distinguishes the host galaxies of radio-loud and radio-quiet AGNs?

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