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We have compared the observed distribution of galaxies in the plane of specific star formation rate versus stellar mass with the predictions of the Garching semi-analytic model at redshifts 0, 1 and 2. The goal is to test whether the…

Astrophysics of Galaxies · Physics 2015-06-12 Bogdan C. Ciambur , Guinevere Kauffmann , Stijn Wuyts

We use hydrodynamical simulations from the OWLS project to investigate the dependence of the physical properties of galaxy populations at redshift 2 on metal-line cooling and feedback from star formation and active galactic nuclei (AGN). We…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Marcel R. Haas , Joop Schaye , C. M. Booth , Claudio Dalla Vecchia , Volker Springel , Tom Theuns , Robert P. C. Wiersma

Active galactic nuclei (AGN) are among the most energetic phenomena in the universe, capable of regulating star formation in galaxies via radiative and mechanical feedback. While AGN feedback is well studied in host galaxies, its influence…

Astrophysics of Galaxies · Physics 2025-07-14 Apashanka Das , Biswajit Pandey

This is the first paper in a series using our MACER framework to investigate the evolution of a disk galaxy, which emphasizes the role of active galactic nucleus (AGN) feedback and incorporates cosmological inflows. This paper presents the…

Astrophysics of Galaxies · Physics 2026-03-13 Yuxuan Zou , Feng Yuan , Suoqing Ji , Luis C. Ho , Yingjie Peng , Jing Wang , Bocheng Zhu , Tao Wang

We study stellar assembly and feedback from active galactic nuclei (AGN) around the epoch of peak star formation (1<z<2), by comparing hydrodynamic simulations to rest-frame UV-optical galaxy colours from the Wide Field Camera 3 (WFC3)…

Partially obscured AGNs within a redshift range $z=0.011\sim0.256$ are used to re-study the role of feedback in the AGN-host coevolution issue in terms of their [OIII]$\lambda$5007 emission line profile. The spectra of these objects enable…

Astrophysics of Galaxies · Physics 2015-06-23 J. Wang

Recently, the existence of geometrically thick dust structures in Active Galactic Nuclei (AGN) has been directly proven with the help of mid-infrared interferometry. The observations are consistent with a two-component model made up of a…

Astrophysics · Physics 2009-11-13 M. Schartmann , K. Meisenheimer , H. Klahr , M. Camenzind , S. Wolf , Th. Henning

Feedback from active galactic nuclei (AGN) is widely considered to be the main driver in regulating the growth of massive galaxies through heating or driving gas out of the galaxy, preventing further increase in stellar mass. Observational…

Astrophysics of Galaxies · Physics 2016-08-03 Dominika Wylezalek , Nadia L. Zakamska

[Abridged] Active Galactic Nuclei (AGN) are thought to be responsible for the suppression of star formation in massive ~10$^{10}$ M$_\odot$ galaxies. While this process is a key feature in numerical simulations, it is not yet unambiguously…

There is growing observational evidence for dwarf galaxies hosting active galactic nuclei (AGN), including hints of AGN-driven outflows in dwarfs. However, in the common theoretical model of galaxy formation, efficient supernova (SN)…

Astrophysics of Galaxies · Physics 2022-09-02 Sophie Koudmani , Debora Sijacki , Matthew C. Smith

This is the fourth paper of our series investigating the effects of active galactic nucleus (AGN) feedback in the evolution of an elliptical galaxy using the {\it MACER} framework. While previous works considered only AGN radiation and…

Astrophysics of Galaxies · Physics 2026-05-01 Minhang Guo , Feng Yuan , Suoqing Ji , Bocheng Zhu

Recent well resolved numerical simulations of AGN feedback have shown that its effects on the host galaxy may be not only negative but also positive. In the late gas poor phase, AGN feedback blows the gas away and terminates star formation.…

Astrophysics of Galaxies · Physics 2015-06-16 Kastytis Zubovas , Sergei Nayakshin , Andrew King , Mark Wilkinson

Numerical simulations of active galactic nuclei (AGN) feedback in cool-core galaxy clusters have successfully avoided classical cooling flows, but often produce too much cold gas. We perform adaptive mesh simulations that include…

Astrophysics of Galaxies · Physics 2015-09-30 Yuan Li , Greg L. Bryan , Mateusz Ruszkowski , G. Mark Voit , Brian W. O'Shea , Megan Donahue

Observations indicate that early-type galaxies exhibit varying slopes in the relation between their central stellar surface density and stellar mass ($\Sigma_1 - M_{\star}$). Low-mass galaxies tend to follow a steep slope, close to one,…

Astrophysics of Galaxies · Physics 2025-04-15 Fazeel Mahmood Khan , Ángel Rodríguez , Andrea V. Macciò , Smarika Sharma

We present a phenomenological model of feedback in early-type galaxies that tracks the evolution of the interstellar medium gas mass, metallicity, and temperature. Modeling the star formation rate as a Schmidt law with a…

Astrophysics · Physics 2009-11-07 Ignacio Ferreras , Evan Scannapieco , Joseph Silk

The inefficiency of star formation in massive elliptical galaxies is widely believed to be caused by the interactions of an active galactic nucleus (AGN) with the surrounding gas. Achieving a sufficiently rapid reddening of moderately…

We take advantage of our recently published model for Galaxy Evolution and Assembly (GAEA) to study the origin of the observed correlation between [$\alpha$/Fe] and galaxy stellar mass. In particular, we analyse the role of radio mode AGN…

Astrophysics of Galaxies · Physics 2017-01-11 Gabriella De Lucia , Fabio Fontanot , Michaela Hirschmann

Radio AGN feedback is often assumed to work, but detailed physical models of this process are not well developed. This paper examines a possible path for radio AGN feedback to heat the gas in and around galaxies and perhaps suppress star…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 David S. De Young

AGN feedback is invoked as one of the most relevant mechanisms that shape the evolution of galaxies. Our goal is to understand the interplay between AGN feedback and the interstellar medium in M51, a nearby spiral galaxy with a modest AGN…

We explore the role of AGN in establishing and/or maintaining the bimodal colour distribution of galaxies by quenching their star-formation and hence, causing their transition from the blue to the red cloud. Important tests for this…