The impact of black hole feedback on the UV luminosity and stellar mass assembly of high-redshift galaxies

Abstract

We employ the Delphi semi-analytical model to study the impact of black hole growth on high-redshift galaxies, both in terms of the observed UV luminosity and of the star formation rate. To do this, firstly, we assess the contribution of AGN to the total galaxy UV luminosity as a function of stellar mass and redshift. We find that for $M_{UV}<-24$ mag and $z\approx 5-6$ the galaxies for which the black hole UV luminosity outshines the stellar UV emission become the majority, and we estimate their duty cycle. Secondly, we study the evolution of the AGN and stellar luminosity functions (LFs), finding that it is driven both by changes in their characteristic luminosities (i.e. evolution of the intrinsic brightness of galaxies) and in their normalizations (i.e. evolution of the number densities of galaxies), depending on the luminosity range considered. Finally, we follow the mass assembly history for three different halo mass bins, finding that the magnitude of AGN-driven outflows depends on the host halo mass. We show that AGN feedback is most effective when the energy emitted by the accreting black hole is approximately $1\%$ of the halo binding energy, and that this condition is met in galaxies in halos with $M_h\sim 10^{11.75}{M}_{\odot }$ at $z=4$. In such cases, AGN feedback can drive outflows that are up to 100 times more energetic than SN-driven outflows, and the star formation rate is a factor of three lower than for galaxies of the same mass without black hole activity.

Published in MNRAS

References in corpus (33)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• A luminous quasar at a redshift of z = 7.085
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• A unified model for AGN feedback in cosmological simulations of structure formation
• Toward the Standard Population Synthesis Model of the X-Ray Background: Evolution of X-Ray Luminosity and Absorption Functions of Active Galactic Nuclei Including Compton-Thick Populations
• UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History
• Absorption Properties and Evolution of Active Galactic Nuclei
• The Final SDSS High-Redshift Quasar Sample of 52 Quasars at z>5.7
• Faint AGNs at z>4 in the CANDELS GOODS-S field: looking for contributors to the reionization of the Universe
• Generating Dark Matter Halo Merger Trees
• The dark nemesis of galaxy formation: why hot haloes trigger black hole growth and bring star formation to an end
• Star formation in a galactic outflow
• Blowin' in the wind: both `negative' and `positive' feedback in an obscured high-z Quasar
• Very extended cold gas, star formation and outflows in the halo of a bright QSO at z>6
• Essential physics of early galaxy formation
• The luminosity function, halo masses and stellar masses of luminous Lyman-break galaxies at redshifts 5<z<6
• The critical radiation intensity for direct collapse black hole formation: dependence on the radiation spectral shape
• The erratic dynamical life of black hole seeds in high-redshift galaxies
• Definitive Identification of the Transition between Small- to Large-Scale Clustering for Lyman Break Galaxies
• The influence of the environmental history on quenching star formation in a $\Lambda$CDM universe
• The Subaru high-z quasar survey: discovery of faint z~6 quasars
• Mapping the Dark Matter From UV Light at High Redshift: An Empirical Approach to Understand Galaxy Statistics
• A survey of luminous high-redshift quasars with SDSS and WISE II. the bright end of the quasar luminosity function at z ~ 5
• Constraining the UV emissivity of AGN throughout cosmic time via X-ray surveys
• Overmassive black holes in the $M_{\mathrm{BH}}-\sigma$ diagram do not belong to over (dry) merged galaxies
• Quasar UV luminosity function evolution up to z=8
• Black hole obscuration and duty cycles mediated by AGN feedback in high redshift galaxies
• The mass assembly of high-redshift black holes
• The Infrared Medium-deep Survey. VIII. Quasar Luminosity Function at $z\sim 5$
• Modelling a bright z = 6 galaxy at the faint end of the AGN luminosity function
• The rapid transition from star-formation to AGN dominated rest-frame UV light at z ~ 4
• GOLDRUSH. IV. Luminosity Functions and Clustering Revealed with ~4,000,000 Galaxies at z~2-7: Galaxy-AGN Transition, Star Formation Efficiency, and Implication for Evolution at z>10