MIGHTEE: the nature of the radio-loud AGN population

• DOI: 10.1093/mnras/stac2140
• Publication Date: 2022-08-02T00:31:02Z
• Authors: I H Whittam; M J Jarvis; C L Hale; M Prescott; L K Morabito; I Heywood; N J Adams; J Afonso; Fangxia An; Y Ao; R A A Bowler; J D Collier; R P Deane; J Delhaize; B Frank; M Glowacki; P W Hatfield; N Maddox; L Marchetti; A M Matthews; I Prandoni; S Randriamampandry; Z Randriamanakoto; D J B Smith; A R Taylor; N L Thomas; M Vaccari
• Keywords: Cosmology and Nongalactic Astrophysics (astro-ph.CO); FOS: Physical sciences; Galaxies: active; Surveys; Catalogues; 530; Astrophysics - Astrophysics of Galaxies; 01 natural sciences; Radio continuum: galaxies; 520; MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE); Astrophysics of Galaxies (astro-ph.GA); XXXXXX - Unknown; 0103 physical sciences; Astrophysics - Cosmology and Nongalactic Astrophysics

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