The rise of active galactic nuclei in the galaxy evolution and assembly semi-analytic model
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The rise of active galactic nuclei in the galaxy evolution and assembly semi-analytic model. / Fontanot, Fabio; De Lucia, Gabriella; Hirschmann, Michaela; Xie, Lizhi; Monaco, Pierluigi; Menci, Nicola; Fiore, Fabrizio; Feruglio, Chiara; Cristiani, Stefano; Shankar, Francesco.
In: Monthly Notices of the Royal Astronomical Society, Vol. 496, No. 3, 2020, p. 3943-3960.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The rise of active galactic nuclei in the galaxy evolution and assembly semi-analytic model
AU - Fontanot, Fabio
AU - De Lucia, Gabriella
AU - Hirschmann, Michaela
AU - Xie, Lizhi
AU - Monaco, Pierluigi
AU - Menci, Nicola
AU - Fiore, Fabrizio
AU - Feruglio, Chiara
AU - Cristiani, Stefano
AU - Shankar, Francesco
PY - 2020
Y1 - 2020
N2 - We present a new implementation of the GAlaxy Evolution and Assembly (GAEA) semianalytic model, that features an improved modelling of the process of cold gas accretion on to supermassive black hole (SMBHs), derived from both analytic arguments and high-resolution simulations. We consider different scenarios for the loss of angular momentum required for the available cold gas to be accreted on to the central SMBHs, and we compare different combinations of triggering mechanisms, including galaxy mergers and disc instabilities in star-forming discs. We compare our predictions with the luminosity function (LF) observed for active galactic nuclei (AGNs) and we confirm that a non-instantaneous accretion time-scale (either in the form of a low-angular momentum reservoir or as an assumed light-curve evolution) is needed in order to reproduce the measured evolution of the AGN-LF and the so-called AGN-downsizing trend. Moreover, we also study the impact of AGN feedback, in the form of AGN-driven outflows, on the SF properties of model galaxies, using prescriptions derived both from empirical studies and from numerical experiments. We show that AGN-driven outflows are effective in suppressing the residual star formation rate in massive galaxies (>10(11)M(circle dot)) without changing their overall assembly history. These winds also affect the SFR of lower mass galaxies, resulting in a too large fraction of passive galaxies at
AB - We present a new implementation of the GAlaxy Evolution and Assembly (GAEA) semianalytic model, that features an improved modelling of the process of cold gas accretion on to supermassive black hole (SMBHs), derived from both analytic arguments and high-resolution simulations. We consider different scenarios for the loss of angular momentum required for the available cold gas to be accreted on to the central SMBHs, and we compare different combinations of triggering mechanisms, including galaxy mergers and disc instabilities in star-forming discs. We compare our predictions with the luminosity function (LF) observed for active galactic nuclei (AGNs) and we confirm that a non-instantaneous accretion time-scale (either in the form of a low-angular momentum reservoir or as an assumed light-curve evolution) is needed in order to reproduce the measured evolution of the AGN-LF and the so-called AGN-downsizing trend. Moreover, we also study the impact of AGN feedback, in the form of AGN-driven outflows, on the SF properties of model galaxies, using prescriptions derived both from empirical studies and from numerical experiments. We show that AGN-driven outflows are effective in suppressing the residual star formation rate in massive galaxies (>10(11)M(circle dot)) without changing their overall assembly history. These winds also affect the SFR of lower mass galaxies, resulting in a too large fraction of passive galaxies at
KW - galaxies: active
KW - galaxies: evolution
KW - galaxies: formation
KW - galaxies: fundamental parameters
KW - SUPERMASSIVE BLACK-HOLES
KW - STAR-FORMATION
KW - HIERARCHICAL-MODELS
KW - SCALING RELATIONS
KW - STELLAR FEEDBACK
KW - METAL ENRICHMENT
KW - ANGULAR-MOMENTUM
KW - AGN FEEDBACK
KW - SIMULATIONS
KW - GROWTH
U2 - 10.1093/mnras/staa1716
DO - 10.1093/mnras/staa1716
M3 - Journal article
VL - 496
SP - 3943
EP - 3960
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 3
ER -
ID: 252154630