|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Cosmic evolution of stellar quenching by AGN feedback: clues from the Horizon-AGN simulation | | R. S. Beckmann
; J. Devriendt
; A. Slyz
; S. Peirani
; M. L. A. Richardson
; Y. Dubois
; C. Pichon
; N. E. Chisari
; S. Kaviraj
; C. Laigle
; M. Volonteri
; | | Date: |
26 Jan 2017 | | Abstract: | The observed massive end of the local galaxy stellar mass function is steeper
than its predicted dark matter (DM) halo counterpart in the standard $Lambda
$CDM paradigm. We investigate how active galactic nuclei (AGN) feedback can
account for such a reduction in the stellar content of massive galaxies,
through an influence on the gas content of their interstellar (ISM) and
circum-galactic medium (CGM). We isolate the impact of AGNs by comparing two
simulations from the HORIZON suite, which are identical except that one
includes super massive black holes (SMBH) and related feedback. This allows us
to cross-identify individual galaxies between these simulations and quantify
the effect of AGN feedback on their properties, such as stellar mass and gas
outflows. We find that the most massive galaxies ($
m M_{*} geq 3 imes
10^{11} M_odot $) are quenched to the extent that their stellar masses
decrease by about 80% at $z=0$. More generally, SMBHs affect their host halo
through a combination of outflows that reduce their baryonic mass, particularly
for galaxies in the mass range $
m 10^9 M_odot leq M_{*} leq 10^{11}
M_odot $, and a disruption of central gas inflows, which limits in-situ star
formation, particularly massive galaxies with $
m M_{*} approx10^{11}
M_odot $. As a result of these processes, net gas inflows onto massive
galaxies drop by up to 70%. Finally, we measure a redshift evolution in the
stellar mass ratio of twin galaxies with and without AGN feedback, with
galaxies of a given stellar mass showing stronger signs of quenching earlier
on. This evolution is driven by a progressive flattening of the $
m
M_{SMBH}-M_* $ relation for galaxies with $
m M_{*} leq 10^{10} M_odot $ as
redshift decreases, which translates into smaller SBMHs being harboured by
galaxies of any fixed stellar mass, and indicates stronger AGN feedback at
higher redshift. | | Source: | arXiv, 1701.7838 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER