eprintid: 10191390
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/19/13/90
datestamp: 2024-04-29 07:51:37
lastmod: 2024-04-29 07:51:37
status_changed: 2024-04-29 07:51:37
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Piana, Olmo
creators_name: Pu, Hung-Yi
creators_name: Wu, Kinwah
title: Super-Eddington accretion in high-redshift black holes and the emergence of jetted AGN
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F63
keywords: galaxies: active, galaxies: evolution, galaxies: jets, quasars: supermassive black holes, early Universe
note: © 2024 The Author(s).
Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative
Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
abstract: In this work we study the co-evolution of central black holes (BHs) and host galaxies by utilizing an advanced iteration of the DELPHI semi-analytical model of galaxy formation and evolution. Based on dark matter halo merger trees spanning the redshift range from z = 20 to z = 4, it now incorporates essential components such as gas heating and cooling, cold and hot BH accretion, jet and radiative AGN feedback. We show how different BH growth models impact quasar and galaxy observables at z ≥ 5, providing predictions that will help discriminate between super-Eddington and Eddington-limited accretion models: despite being both consistent with observed properties of SMBHs and their host galaxies at z ∼ 5 − 7, they become very clearly distinguishable at higher redshift and in the intermediate mass regime. We find that the super-Eddington model, unlike the Eddington-limited scenario, predicts a gap in the BH mass function corresponding to the intermediate-mass range 104 M⊙ < Mbh < 106 M⊙. Additionally, it predicts black holes up to two orders of magnitude more massive for the same stellar mass at z = 9. The resulting velocity dispersion – BH mass relation at z ≥ 5 is consistent with local measurements, suggesting that its slope and normalisation are independent of redshift. Depending on the Eddington ratio, we also model the emergence of AGN jets, predicting their duty cycle across as a function of BH mass and their potential impact on the observed number density distribution of high-redshift AGN in the hard X-ray band.
date: 2024-05
date_type: published
publisher: Oxford University Press (OUP)
official_url: http://dx.doi.org/10.1093/mnras/stae851
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2263749
doi: 10.1093/mnras/stae851
lyricists_name: Wu, Kinwah
lyricists_id: KWUXX50
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Monthly Notices of the Royal Astronomical Society
volume: 530
number: 2
pagerange: 1732-1748
issn: 0035-8711
citation:        Piana, Olmo;    Pu, Hung-Yi;    Wu, Kinwah;      (2024)    Super-Eddington accretion in high-redshift black holes and the emergence of jetted AGN.                   Monthly Notices of the Royal Astronomical Society , 530  (2)   pp. 1732-1748.    10.1093/mnras/stae851 <https://doi.org/10.1093/mnras%2Fstae851>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10191390/1/stae851.pdf