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We have constructed an analytical model of AGN feedback and studied its implications for elliptical galaxies and galaxy clusters. The results show that momentum injection above a critical value will eject material from low mass elliptical…

Astrophysics of Galaxies · Physics 2009-11-13 Edward C. D. Pope

We measure and analyze the inflows and outflows of mass, energy, and metals through the interstellar medium (ISM) and circumgalactic medium (CGM) of galaxies in the IllustrisTNG100 simulations. We identify the dominant feedback mechanism in…

Astrophysics of Galaxies · Physics 2026-03-10 Yossi Oren , Viraj Pandya , Rachel S. Somerville , Shy Genel , Osase Omoruyi , Amiel Sternberg

The energy emitted by active galactic nuclei (AGN) may provide a self-regulating process (AGN feedback) that shapes the evolution of galaxies. This is believed to operate along two modes: on galactic scales by clearing the interstellar…

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

Feedback from Active Galactic Nuclei (AGN) and subsequent jet cocoons and outflow bubbles can have a significant impact on star formation in the host galaxy. To investigate feedback physics on small scales, we perform hydrodynamic…

Astrophysics of Galaxies · Physics 2017-05-03 Zachary Dugan , Volker Gaibler , Rebekka Bieri , Joseph Silk , Mubdi Rahman

Feedback processes play a fundamental role in the regulation of the star formation (SF) activity in galaxies and, in particular, in the quenching of early-type galaxies (ETGs) as has been inferred by observational and numerical studies of…

Supermassive black holes (SMBHs) are found in the centres of most galaxies. Their masses, and hence their gravitational potentials, are negligible compared with those of the host galaxy. However, several strong correlations between SMBH…

Astrophysics of Galaxies · Physics 2019-05-27 K. Zubovas , A. R. King

Recent observations and simulations have challenged the long-held paradigm that mergers are the dominant mechanism driving the growth of both galaxies and supermassive black holes (SMBH), in favour of non-merger (secular) processes. In this…

We investigate the role of AGN feedback in turbulent heating of galaxy clusters. Specifically, we analyze the production of turbulence by g-modes generated by the supersonic expansion and buoyant rise of AGN-driven bubbles. Previous work…

High Energy Astrophysical Phenomena · Physics 2018-05-02 Christopher J. Bambic , Brian J. Morsony , Christopher S. Reynolds

Contrary to the standard lore, there is mounting observational evidence that feedback from active galactic nuclei (AGN) may also play a role at the low-mass end of the galaxy population. We investigate this using the cosmological simulation…

Astrophysics of Galaxies · Physics 2021-03-22 Sophie Koudmani , Nicholas A. Henden , Debora Sijacki

The interplay between cosmic gas accretion on to galaxies and galaxy mergers drives the observed morphological diversity of galaxies. By comparing the state-of-the-art hydrodynamical cosmological simulations Horizon-AGN and Horizon-noAGN,…

The quenching of star formation is a crucial phase in galaxy evolution. Although active galactic nuclei (AGN) feedback has been proposed as a key driver of this transition, the lack of strong AGN in nearby quenching galaxies raises…

Recent observations have found extended multi-phase gas in a significant fraction of massive elliptical galaxies. We perform high-resolution three-dimensional hydrodynamical simulations of two idealized elliptical galaxies -- one…

Astrophysics of Galaxies · Physics 2018-11-07 Chaoran Wang , Yuan Li , Mateusz Ruszkowski

We examine the connection between the properties of the circumgalactic medium (CGM) and the quenching and morphological evolution of central galaxies in the EAGLE and IllustrisTNG simulations. The simulations yield very different median CGM…

Astrophysics of Galaxies · Physics 2019-11-18 Jonathan J. Davies , Robert A. Crain , Benjamin D. Oppenheimer , Joop Schaye

Using several variants of the cosmological Simba simulations, we investigate the impact of different feedback prescriptions on the cosmic star formation history. Adopting a global-to-local approach, we link signatures seen in global…

Astrophysics of Galaxies · Physics 2024-04-12 Lucie Scharré , Daniele Sorini , Romeel Davé

Active galactic nuclei (AGN) have been observed in dwarf galaxies, yet the impact of black hole feedback in these low-mass systems remains unclear. To uncover the potential effects of AGN in the low-mass galaxy regime, we study the…

We study the effect of AGN mechanical and radiation feedback on the formation of bulge dominated galaxies via mergers of disc galaxies. The merging galaxies have mass-ratios of 1:1 to 6:1 and include pre-existing hot gaseous halos to…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Ena Choi , Thorsten Naab , Jeremiah P. Ostriker , Peter H. Johansson , Benjamin P. Moster

The interaction between jets from active galactic nuclei (AGNs) and the intracluster medium (ICM) provides key constraints on the feeding and feedback of supermassive black holes. Much understanding about AGN feedback is gained from purely…

High Energy Astrophysical Phenomena · Physics 2019-10-02 M. Kingsland , H. -Y. K. Yang , C. S. Reynolds , J. A. Zuhone

Numerical simulations suggest that active galactic nuclei (AGNs) play an important role in the formation of early-type galaxies by expelling gas and dust in powerful galactic winds and quenching star formation. However, the existence of AGN…

Astrophysics · Physics 2009-11-13 Christy A. Tremonti , John Moustakas , Aleksandar M. Diamond-Stanic

We present the results of three dimensional relativistic hydrodynamic simulations of interaction of AGN jets with a dense turbulent two-phase interstellar medium, which would be typical of high redshift galaxies. We describe the effect of…

High Energy Astrophysical Phenomena · Physics 2016-06-15 Dipanjan Mukherjee , Geoffrey V. Bicknell , Ralph S. Sutherland , A. Y. Wagner