MIGHTEE: the nature of the radio-loud AGN population

Whittam, I. H.; Jarvis, M. J.; Hale, C. L.; Prescott, M.; Morabito, L. K.; Heywood, I.; Adams, N. J.; Afonso, J.; An, Fangxia; Ao, Y.; Bowler, R. A. A.; Collier, J. D.; Deane, R. P.; Delhaize, J.; Frank, B.; Glowacki, M.; Hatfield, P. W.; Maddox, N.; Marchetti, L.; Matthews, A. M.; Prandoni, I.; Randriamampandry, S.; Randriamanakoto, Z.; Smith, D. J. B.; Taylor, A. R.; Thomas, N. L.; Vaccari, M.

doi:10.1093/mnras/stac2140

MIGHTEE: the nature of the radio-loud AGN population

Journal Article · Mon Aug 01 00:00:00 EDT 2022 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stac2140· OSTI ID:1883259

; ; ; ; ; ; ; ; An, Fangxia; Ao, Y.; ; Collier, J. D.; ; ; Frank, B.; Glowacki, M.; ; ; ; Matthews, A. M. more »

ABSTRACT

We study the nature of the faint radio source population detected in the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Early Science data in the COSMOS field, focusing on the properties of the radio-loud active galactic nuclei (AGNs). Using the extensive multiwavelength data available in the field, we are able to classify 88 per cent of the 5223 radio sources in the field with host galaxy identifications as AGNs (35 per cent) or star-forming galaxies (54 per cent). We select a sample of radio-loud AGNs with redshifts out to z ∼ 6 and radio luminosities 1020 < L1.4 GHz/W Hz−1 < 1027 and classify them as high-excitation and low-excitation radio galaxies (HERGs and LERGs). The classification catalogue is released with this work. We find no significant difference in the host galaxy properties of the HERGs and LERGs in our sample. In contrast to previous work, we find that the HERGs and LERGs have very similar Eddington-scaled accretion rates; in particular we identify a population of very slowly accreting AGNs that are formally classified as HERGs at these low radio luminosities, where separating into HERGs and LERGs possibly becomes redundant. We investigate how black hole mass affects jet power, and find that a black hole mass ≳ 107.8 M⊙ is required to power a jet with mechanical power greater than the radiative luminosity of the AGN (Lmech/Lbol > 1). We discuss that both a high black hole mass and black hole spin may be necessary to launch and sustain a dominant radio jet.

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Sponsoring Organization:: USDOE Office of Nuclear Energy (NE), Nuclear Fuel Cycle and Supply Chain

OSTI ID:: 1883259

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 1 Vol. 516; ISSN 0035-8711

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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A NEW CONSTRAINT ON THE LyαFRACTION OF UV VERY BRIGHT GALAXIES AT REDSHIFT 7 Furusawa, Hisanori; Kashikawa, Nobunari; Kobayashi, Masakazu A. R. The Astrophysical Journal, Vol. 822, Issue 1 https://doi.org/10.3847/0004-637X/822/1/46	journal	May 2016
THE VLT LEGA-C SPECTROSCOPIC SURVEY: THE PHYSICS OF GALAXIES AT A LOOKBACK TIME OF 7 Gyr van der Wel, A.; Noeske, K.; Bezanson, R. The Astrophysical Journal Supplement Series, Vol. 223, Issue 2 https://doi.org/10.3847/0067-0049/223/2/29	journal	April 2016
THE COSMOS2015 CATALOG: EXPLORING THE 1 < z < 6 UNIVERSE WITH HALF A MILLION GALAXIES Laigle, C.; McCracken, H. J.; Ilbert, O. The Astrophysical Journal Supplement Series, Vol. 224, Issue 2 https://doi.org/10.3847/0067-0049/224/2/24	journal	June 2016
THE 3D-HST SURVEY: HUBBLE SPACE TELESCOPE WFC3/G141 GRISM SPECTRA, REDSHIFTS, AND EMISSION LINE MEASUREMENTS FOR ∼100,000 GALAXIES Momcheva, Ivelina G.; Brammer, Gabriel B.; van Dokkum, Pieter G. The Astrophysical Journal Supplement Series, Vol. 225, Issue 2 https://doi.org/10.3847/0067-0049/225/2/27	journal	August 2016
The Astropy Project: Building an Open-science Project and Status of the v2.0 Core Package Price-Whelan, A. M.; Sipőcz, B. M.; Günther, H. M. The Astronomical Journal, Vol. 156, Issue 3 https://doi.org/10.3847/1538-3881/aabc4f	journal	August 2018
AGNfitter: A BAYESIAN MCMC APPROACH TO FITTING SPECTRAL ENERGY DISTRIBUTIONS OF AGNs Calistro Rivera, Gabriela; Lusso, Elisabeta; Hennawi, Joseph F. The Astrophysical Journal, Vol. 833, Issue 1 https://doi.org/10.3847/1538-4357/833/1/98	journal	December 2016
The DEIMOS 10K Spectroscopic Survey Catalog of the COSMOS Field Hasinger, G.; Capak, P.; Salvato, M. The Astrophysical Journal, Vol. 858, Issue 2 https://doi.org/10.3847/1538-4357/aabacf	journal	May 2018
The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment Abolfathi, Bela; Aguado, D. S.; Aguilar, Gabriela The Astrophysical Journal Supplement Series, Vol. 235, Issue 2 https://doi.org/10.3847/1538-4365/aa9e8a	journal	April 2018
Spitzer Matching Survey of the UltraVISTA Ultra-deep Stripes (SMUVS): Full-mission IRAC Mosaics and Catalogs Ashby, M. L. N.; Caputi, Karina I.; Cowley, Will The Astrophysical Journal Supplement Series, Vol. 237, Issue 2 https://doi.org/10.3847/1538-4365/aad4fb	journal	August 2018
The Large Early Galaxy Astrophysics Census (LEGA-C) Data Release 2: Dynamical and Stellar Population Properties of z ≲ 1 Galaxies in the COSMOS Field Straatman, Caroline M. S.; Wel, Arjen van der; Bezanson, Rachel The Astrophysical Journal Supplement Series, Vol. 239, Issue 2 https://doi.org/10.3847/1538-4365/aae37a	journal	December 2018

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