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We study star cluster formation in various environments with different metallicities and column densities by performing a suite of three-dimensional radiation hydrodynamics simulations. We find that the photoionization feedback from massive…

Astrophysics of Galaxies · Physics 2020-08-25 Hajime Fukushima , Hidenobu Yajima , Kazuyuki Sugimura , Takashi Hosokawa , Kazuyuki Omukai , Tomoaki Matsumoto

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

Ionising feedback from massive stars dramatically affects the interstellar medium local to star forming regions. Numerical simulations are now starting to include enough complexity to produce morphologies and gas properties that are not too…

Instrumentation and Methods for Astrophysics · Physics 2015-12-23 D. A. Hubber , B. Ercolano , J. Dale

We explore the interplay between supernovae and the ionizing radiation of their progenitors in star forming regions. The relative contributions of these stellar feedback processes are not well understood, particularly on scales greater than…

Astrophysics of Galaxies · Physics 2022-06-01 Thomas J. R. Bending , Clare L. Dobbs , Matthew R. Bate

We present a new set of analytic models for the expansion of HII regions powered by UV photoionisation from massive stars and compare them to a new suite of radiative magnetohydrodynamic simulations of turbulent, self-gravitating molecular…

Astrophysics of Galaxies · Physics 2016-06-08 Sam Geen , Patrick Hennebelle , Pascal Tremblin , Joakim Rosdahl

We extend our previous SPH parameter study of the effects of photoionization from O-stars on star-forming clouds to include initially unbound clouds. We generate a set of model clouds in the mass range $10^{4}-10^{6}$M$_{\odot}$ with…

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

By performing three-dimensional radiation hydrodynamics simulations, we study the formation of young massive star clusters (YMCs, $M_{*}>10^4~M_{\odot}$) in clouds with the surface density ranging from $\Sigma_{\rm cl} = 80$ to…

Astrophysics of Galaxies · Physics 2021-08-18 Hajime Fukushima , Hidenobu Yajima

We investigate how the removal of interstellar material by stellar feedback limits the efficiency of star formation in molecular clouds and how this determines the shape of the mass function of young star clusters. In particular, we derive…

Solar and Stellar Astrophysics · Physics 2015-05-14 S. Michael Fall , Mark R. Krumholz , Christopher D. Matzner

We present a numerical study of the evolution of molecular clouds, from their formation by converging flows in the warm ISM, to their destruction by the ionizing feedback of the massive stars they form. We improve with respect to our…

Astrophysics of Galaxies · Physics 2015-06-15 Pedro Colin , Enrique Vazquez-Semadeni , Gilberto C. Gomez

We present an SPH parameter study of the dynamical effect of photoionization from O--type stars on star--forming clouds of a range of masses and sizes during the time window before supernovae explode. Our model clouds all have the same…

Astrophysics of Galaxies · Physics 2015-06-05 J. E. Dale , B. Ercolano , I. A. Bonnell

We present numerical simulations of a 15 solar mass star in a suite of idealised environments in order to quantify the amount of energy transmitted to the interstellar medium (ISM). We include models of stellar winds, UV photoionisation and…

Astrophysics of Galaxies · Physics 2015-06-23 Sam Geen , Joakim Rosdahl , Jeremy Blaizot , Julien Devriendt , Adrianne Slyz

We report on Smoothed Particle Hydrodynamics (SPH) simulations of the impact on a turbulent $\sim2\times10^{3}$ M$_{\odot}$ star--forming molecular cloud of irradiation by an external source of ionizing photons. We find that the ionizing…

Solar and Stellar Astrophysics · Physics 2015-06-04 James E Dale , Ian A Bonnell

We simulate the formation of second-generation stars in young clusters with masses of $10^{5}$ and $10^6\ {\rm M_\odot}$ within $30-100\ {\rm Myr}$ after the formation of clusters. We assume the clusters move through a uniform interstellar…

Astrophysics of Galaxies · Physics 2023-12-13 Asiyeh Yaghoobi , Joakim Rosdahl , Francesco Calura , Sareh Ataiee

We describe a new method for simulating ionizing radiation and supernova feedback in the analogues of low-redshift galactic disks. In this method, which we call star-forming molecular cloud (SFMC) particles, we use a ray-tracing technique…

Astrophysics of Galaxies · Physics 2018-03-12 Ji-hoon Kim , Mark R. Krumholz , John H. Wise , Matthew J. Turk , Nathan J. Goldbaum , Tom Abel

The role of different stellar feedback mechanisms in giant molecular clouds is not well understood. This is especially true for regions with many interacting clouds as would be found in a galactic spiral arm. In this paper, building on…

Astrophysics of Galaxies · Physics 2022-01-13 Ahmad A. Ali , Thomas J. R. Bending , Clare L. Dobbs

We calculate the hydrogen and helium-ionizing radiation escaping star-forming molecular clouds, as a function of the star cluster mass and compactness, using a set of high-resolution radiation-magneto-hydrodynamic simulations of star…

Astrophysics of Galaxies · Physics 2020-01-29 Chong-Chong He , Massimo Ricotti , Sam Geen

We present a novel set of stellar feedback models, implemented in the moving-mesh code Arepo, designed for galaxy formation simulations with near-parsec (or better) resolution. These include explicit sampling of stars from the IMF, allowing…

The role of feedback from massive stars is believed to be a key element in the evolution of molecular clouds. We use high-resolution 3D SPH simulations to explore the dynamical effects of a single O7 star located at the centre of a…

Astrophysics of Galaxies · Physics 2015-06-05 S. Walch , A. P. Whitworth , T. Bisbas , R. Wunsch , D. Hubber

We investigate the origin of observed local star formation relations using radiative magnetohydrodynamic simulations with self-consistent star formation and ionising radiation. We compare these clouds to the density distributions of local…

Astrophysics of Galaxies · Physics 2017-09-06 Sam Geen , Juan D Soler , Patrick Hennebelle

The relative impact of radiation pressure and photoionization feedback from young stars on surrounding gas is studied with hydrodynamic radiative transfer (RT) simulations. The calculations focus on the single-scattering (direct radiation…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Laura V. Sales , Federico Marinacci , Volker Springel , Margarita Petkova