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Star formation is a fundamental process for galactic evolution. One issue over the last several decades has been determining whether star formation is induced by external triggers or is self-regulated in a closed system. The role of an…

Astrophysics of Galaxies · Physics 2020-12-16 Yasuo Fukui , Asao Habe , Tsuyoshi Inoue , Rei Enokiya , Kengo Tachihara

I review the current state of numerical simulations of stellar feedback in the context of star formation at scales ranging from the formation of individual stars to models of galaxy formation including cosmic reionisation. I survey the…

Astrophysics of Galaxies · Physics 2015-08-26 James E. Dale

Feedback from massive stars plays a key role in molecular cloud evolution. After the onset of star formation, the young stellar population is exposed by photoionization, winds, supernovae, and radiation pressure from massive stars. Recent…

Giant star-forming regions (clumps) are widespread features of galaxies at $z \approx 1-4$. Theory predicts that they can play a crucial role in galaxy evolution if they survive to stellar feedback for > 50 Myr. Numerical simulations show…

Galactic outflows driven by stellar feedback are crucial for explaining the inefficiency of star formation in galaxies. Although strong feedback can promote the formation of galactic discs by limiting star formation at early times and…

Astrophysics of Galaxies · Physics 2020-08-13 Michael Kretschmer , Oscar Agertz , Romain Teyssier

The bright [C II] 158 micron line is widely used to trace star-forming gas and feedback-driven outflows in high-redshift galaxies. Using the SPICE simulations, we investigate how bursty versus smooth stellar feedback shapes galaxy…

Astrophysics of Galaxies · Physics 2026-05-01 Aniket Bhagwat , Tiago Costa , Benedetta Ciardi , Fabrizio Arrigoni Battaia

We investigate star formation occurring in idealised giant molecular clouds, comparing structures that evolve in isolation versus those undergoing a collision. Two different collision speeds are investigated and the impact of photoionising…

Astrophysics of Galaxies · Physics 2017-10-16 Kazuhiro Shima , Elizabeth J. Tasker , Christoph Federrath , Asao Habe

We present a numerical study of the impact of AGN accretion and feedback on the star formation history of barred disc galaxies. Our goal is to determine whether the effect of feedback is positive (enhanced star formation) or negative…

Astrophysics of Galaxies · Physics 2017-06-28 Fidèle Robichaud , David Williamson , Hugo Martel , Daisuke Kawata , Sara L. Ellison

We develop a new realistic prescription for modeling the stellar feedback, which minimizes any ad hoc assumptions about sub-grid physics. We start with developing high resolution models of the ISM and formulate the conditions required for…

Astrophysics · Physics 2009-04-03 Daniel Ceverino , Anatoly Klypin

We use our state-of-the-art Galaxy Evolution and Assembly (GAEA) semi-analytic model to study how and on which time-scales star formation is suppressed in satellite galaxies. Our fiducial stellar feedback model, implementing strong stellar…

Astrophysics of Galaxies · Physics 2018-11-28 Gabriella De Lucia , Michaela Hirschmann , Fabio Fontanot

It is generally believed that expanding superbubbles and mechanical feedback from massive stars trigger star formation, because there are numerous examples of superbubbles showing secondary star formation at their edges. However, while…

Astrophysics · Physics 2009-11-10 M. S. Oey , A. M. Watson , K. Kern , G. L. Walth

Quasar outflows might either quench (negative) or enhance (positive feedback) star formation in galaxies located in the quasar environment. The possible outcome depends on 4 parameters: the quasar ($\sigma$) and satellite ($\sigma_*$) halo…

Astrophysics of Galaxies · Physics 2023-02-08 Andrea Ferrara , Tommaso Zana , Simona Gallerani , Laura Sommovigo

We present a two-zone theory for feedback-regulated star formation in galactic discs, consistently connecting the galaxy-averaged star formation law with star formation proceeding in giant molecular clouds (GMCs). Our focus is on galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 C. -A. Faucher-Giguere , E. Quataert , P. F. Hopkins

Quantifying the timescales of star cluster emergence from their natal clouds remains one of the main challenges in understanding the star formation process. These timescales are fundamental measurements of the star formation cycle within…

Star formation in galaxies is regulated by the interplay of a range of processes that shape the multiphase gas in the interstellar and circumgalactic media. Using the CAMELS suite of cosmological simulations, we study the effects of varying…

Negative feedback from accreting supermassive black holes is regarded as a key ingredient in suppressing star formation and quenching massive galaxies. However, several models and observations suggest that black hole feedback may have a…

Motivated by recent observations of the star formation rate density function out to z~7, we describe a simple model for the star formation rate density function at high redshift based on the extended Press-Schechter formalism. This model…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Stuart Wyithe , Abraham Loeb

Stellar winds and supernova (SN) explosions of massive stars ("stellar feedback") create bubbles in the interstellar medium (ISM) and insert newly produced heavy elements and kinetic energy into their surroundings, possibly driving…

Feedback from stars and active galactic nuclei (AGNs) primarily affects the formation and evolution of galaxies and the circumgalactic medium, leaving some kind of imprint on larger scales. Based on the {\sc Simba} hydrodynamical simulation…

Cosmology and Nongalactic Astrophysics · Physics 2024-09-25 Carlo Schimd , Katarina Kraljic , Romeel Davé , Christophe Pichon

We present the fourth in a series of papers detailing our SPH study of the effects of ionizing feedback from O--type stars on turbulent star forming clouds. Here, we study the effects of photoionization on a series of initially partially…

Astrophysics of Galaxies · Physics 2015-06-12 J. E. Dale , B. Ercolano , I. A. Bonnell