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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28684
Title: On the role of supermassive black holes in quenching star formation in local central galaxies
Authors: Arora, Nikhil
Fossati, Matteo
FONTANOT, Fabio 
Hirschmann, Michaela
Wilman, David J.
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 489
Issue: 2
First Page: 1606
Abstract: We analyse the role of AGN feedback in quenching star formation for massive, central galaxies in the local Universe. In particular, we compare the prediction of two semi-analytic models (L-GALAXIES and SAGE) featuring different schemes for AGN feedback, with the SDSS DR7 taking advantage of a novel technique for identifying central galaxies in an observational data set. This enables us to study the correlation between the model passive fractions, which is predicted to be suppressed by feedback from an AGN, and the observed passive fractions in an observationally motivated parameter space. While the passive fractions for observed central galaxies show a good correlation with stellar mass and bulge mass, passive fractions in L-GALAXIES correlate with the halo and black hole mass. For SAGE, the passive fraction correlate with the bulge mass as well. Among the two models, SAGE has a smaller scatter in the black hole-bulge mass ({M_BH-M_Bulge}) relation and a slope that agrees better with the most recent observations at z ∼ 0. Despite the more realistic prescription of radio-mode feedback in SAGE, there are still tensions left with the observed passive fractions and the distribution of quenched galaxies. These tensions may be due to the treatment of galaxies living in non-resolved substructures and the resulting higher merger rates that could bring cold gas which is available for star formation.
URI: http://hdl.handle.net/20.500.12386/28684
URL: https://academic.oup.com/mnras/article-abstract/489/2/1606/5550752
ISSN: 0035-8711
DOI: 10.1093/mnras/stz2266
Bibcode ADS: 2019MNRAS.489.1606A
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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