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We present a new version of a semi-analytic model of cosmological galaxy formation, incorporating a star formation law with a feedback depending on the galaxy-scale mean dust opacity and metallicity, motivated by recent observations of star…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 Ryu Makiya , Tomonori Totani , Masakazu A. R. Kobayashi , Masahiro Nagashima , Tsutomu T. Takeuchi

Energetic feedback from star clusters plays a pivotal role in shaping the dynamical evolution of giant molecular clouds (GMCs). To study the effects of stellar feedback on the star formation efficiency of the clouds and the dynamical…

Astrophysics of Galaxies · Physics 2019-05-29 Hui Li , Mark Vogelsberger , Federico Marinacci , Oleg Y. Gnedin

How do late type spiral galaxies form within the context of a CDM cosmology? We contrast N-body, smoothed particle hydrodynamical simulations of galaxy formation which employ two different supernova feedback mechanisms. Observed mass and…

Astrophysics · Physics 2009-11-10 Chris B. Brook , Daisuke Kawata , Brad K. Gibson , Chris Flynn

We performed 3-dimensional N-body/SPH simulations to study how mass resolution and other model parameters such as the star formation efficiency parameter, C* and the threshold density, nth affect structures of the galactic gaseous/stellar…

We present cosmological hydrodynamic simulations performed to study evolution of galaxy population. The simulations follow timed release of mass, energy, and metals by stellar evolution and employ phenomenological treatments of supernova…

Astrophysics of Galaxies · Physics 2014-09-15 Takashi Okamoto , Ikkoh Shimizu , Naoki Yoshida

It remains unclear how galactic environment affects star formation and stellar cluster properties. This is difficult to address in Milky Way-mass galaxy simulations because of limited resolution and less accurate feedback compared to…

Astrophysics of Galaxies · Physics 2023-07-05 Ahmad A. Ali , Clare L. Dobbs , Thomas J. R. Bending , Anne S. M. Buckner , Alex R. Pettitt

Feedback from star formation is thought to play a key role in the formation and evolution of galaxies, but its implementation in cosmological simulations is currently hampered by a lack of numerical resolution. We present and test a…

Astrophysics · Physics 2011-06-29 Claudio Dalla Vecchia , Joop Schaye

State-of-the-art cosmological hydrodynamical simulations of galaxy formation have reached the point at which their outcomes result in galaxies with ever more realism. Still, the employed sub-grid models include several free parameters such…

Astrophysics of Galaxies · Physics 2019-04-17 Tobias Buck , Aaron A. Dutton , Andrea V. Macciò

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

The role of large-scale stellar feedback in the formation of molecular clouds has been investigated observationally by examining the relationship between HI and 12CO(J=1-0) in supershells. Detailed parsec-resolution case studies of two…

Astrophysics of Galaxies · Physics 2015-06-11 J. R. Dawson , N. M. McClure-Griffiths , Y. Fukui , J. Dickey , T. Wong , A. Hughes , A. Kawamura

We explore the relationship between stellar surface density and gas surface density (the star-gas or S-G correlation) in a 20,000 M$_{\odot}$ simulation from the STAR FORmation in Gaseous Environments (STARFORGE) Project. We create…

Astrophysics of Galaxies · Physics 2023-10-19 Samuel Millstone , Robert Gutermuth , Stella S. R. Offner , Riwaj Pokhrel , Michael Y. Grudić

Molecular cloud structure is regulated by stellar feedback in various forms. Two of the most important feedback processes are UV photoionisation and supernovae from massive stars. However, the precise response of the cloud to these…

Astrophysics of Galaxies · Physics 2016-09-21 Sam Geen , Patrick Hennebelle , Pascal Tremblin , Joakim Rosdahl

Comparison of observed satellite galaxies of the Milky Way (hereafter MW) with dark matter subhaloes in cosmological $N$-body simulations of MW-mass haloes suggest that such subhaloes, if they exist, are occupied by satellites in a…

Astrophysics of Galaxies · Physics 2014-06-30 Chris Power , Graham A. Wynn , Aaron S. G. Robotham , Geraint F. Lewis , Mark I. Wilkinson

The relations between star formation and properties of molecular clouds are studied based on a sample of star forming regions in the Galactic Plane. Sources were selected by having radio recombination lines to provide identification of…

Solar and Stellar Astrophysics · Physics 2017-03-08 Nalin Vutisalchavakul , Neal J. Evans , Mark Heyer

We have developed a new scheme to treat a multiphase interstellar medium in smoothed particle hydrodynamics simulations of galaxy formation. This scheme can represent a co-spatial mixture of cold and hot ISM components, and is formulated…

We use two hydrodynamical simulations (with and without photoionising feedback) of the self-consistent evolution of molecular clouds (MCs) undergoing global hierarchical collapse (GHC), to study the effect of the feedback on the structural…

Astrophysics of Galaxies · Physics 2020-09-25 Alejandro González-Samaniego , Enrique Vazquez-Semadeni

Recent results from the James Webb Space Telescope show that nearby spiral galaxies are dominated by the presence of H I and H II bubbles that strongly shape their surrounding medium. These bubbles result from the feedback of high-mass…

We present a study of a star formation prescription in which star formation efficiency depends on local gas density and turbulent velocity dispersion, as suggested by direct simulations of SF in turbulent giant molecular clouds (GMCs). We…

Astrophysics of Galaxies · Physics 2017-08-22 Vadim A. Semenov , Andrey V. Kravtsov , Nickolay Y. Gnedin

We use cosmological zoom-in simulations of galaxy formation in a Milky Way (MW)-sized halo started from identical initial conditions to investigate the evolution of galaxy sizes, baryon fractions, morphologies and angular momenta in runs…

Astrophysics of Galaxies · Physics 2017-02-15 Oscar Agertz , Andrey V. Kravtsov

Until recently, simulations that modeled entire galaxies were restricted to an isothermal or fixed 2- or 3-phase interstellar medium (ISM). This obscured the full role of the ISM in shaping the observed galactic-scale star formation…

Astrophysics · Physics 2008-02-28 Elizabeth J. Tasker , Greg L. Bryan , Jonathan C. Tan
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