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We use a set of 3D radiative transfer simulations to study the effect that a large fraction of binary stars in galaxies during the epoch of reionization has on the physical properties of the intergalactic medium (i.e. the gas temperature…

Cosmology and Nongalactic Astrophysics · Physics 2022-04-20 Qing-Bo Ma , Silvia Fiaschi , Benedetta Ciardi , Philipp Busch , Marius B. Eide

Binary stars and their interactions shape the formation of compact binaries, supernovae, and gravitational wave sources. The efficiency of mass transfer - the fraction of mass retained by the accretor during binary interaction - is a…

Solar and Stellar Astrophysics · Physics 2025-08-26 Thibault Lechien , Selma E. de Mink , Ruggero Valli , Amanda C. Rubio , Lieke A. C. van Son , Robert Klement , Harim Jin , Onno Pols

We perform a high resolution zoom-in simulation of star cluster assembly including the merger of two sub-clusters with initial conditions taken from previous large scale giant molecular cloud (GMC) simulations. We couple hydrodynamics to…

Astrophysics of Galaxies · Physics 2025-07-04 Jeremy Karam , Michiko S. Fujii , Alison Sills

Mechanical feedback from massive stars, primarily from supernovae, can dominate ISM structuring and phase balance, thereby profoundly affecting galactic evolutionary processes. Our understanding of mechanical feedback is based on the…

Astrophysics · Physics 2008-11-26 M. S. Oey

We introduce the Stars and MUltiphase Gas in GaLaxiEs -- SMUGGLE model, an explicit and comprehensive stellar feedback model for the moving-mesh code arepo. This novel sub-resolution model resolves the multiphase gas structure of the…

Astrophysics of Galaxies · Physics 2019-09-25 Federico Marinacci , Laura V. Sales , Mark Vogelsberger , Paul Torrey , Volker Springel

Binary stars are abundant in nearby galaxies, but are typically unaccounted for in simulations of the high redshift Universe. Stellar population synthesis models that include the effects of binary evolution result in greater relative…

Astrophysics of Galaxies · Physics 2021-05-24 Caitlin C. Doughty , Kristian M. Finlator

We include feedback in global hydrodynamic simulations in order to study the star formation properties, and gas structure and dynamics, in models of galactic disks. We extend previous models by implementing feedback in gravitationally bound…

Astrophysics · Physics 2009-11-13 Rahul Shetty , Eve C. Ostriker

Using 3D radiation-hydrodynamical simulations, we study the effects of ionising radiation on the formation of second-generation (SG) stars in Globular Clusters (GCs) with multiple stellar populations. In particular, we focus on massive…

Astrophysics of Galaxies · Physics 2022-10-25 Asiyeh Yaghoobi , Joakim Rosdahl , Francesco Calura , Pouria Khalaj , Hosein Haghi

We investigated the effect of photoionising feedback inside turbulent star-forming clouds, comparing the resultant star formation in both idealised profiles and more realistic cloud structures drawn from a global galaxy simulation. We…

Astrophysics of Galaxies · Physics 2017-09-19 Kazuhiro Shima , Elizabeth J. Tasker , Asao Habe

Nearby companions alter the evolution of massive stars in binary systems. Using a sample of Galactic massive stars in nearby young clusters, we simultaneously measure all intrinsic binary characteristics relevant to quantify the frequency…

Solar and Stellar Astrophysics · Physics 2012-11-21 H. Sana , S. E. de Mink , A. de Koter , N. Langer , C. J. Evans , M. Gieles , E. Gosset , R. G. Izzard , J. -B. Le Bouquin , F. R. N. Schneider

The stellar content of young massive star clusters emit large amounts of Lyman continuum photons and inject momentum into the inter stellar medium (ISM) by the strong stellar winds of the most massive stars in the cluster. When the most…

Astrophysics of Galaxies · Physics 2015-10-08 Arjan Bik , Göran Östlin , Veronica Menacho , Angela Adamo , Matthew Hayes , Jens Melinder , Philippe Amram

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

Both rotation and interactions with binary companions can significantly affect massive star evolution, altering interior and surface abundances, mass loss rates and mechanisms, observed temperatures and luminosities, and their ultimate…

Solar and Stellar Astrophysics · Physics 2020-07-01 Trevor Z. Dorn-Wallenstein , Emily M. Levesque

In order to better understand the relationship between feedback and galactic chemical evolution, we have developed a new model for stellar feedback at grid resolutions of only a few parsecs in global disk simulations, using the adaptive…

Astrophysics of Galaxies · Physics 2018-10-17 Andrew Emerick , Greg L. Bryan , Mordecai-Mark Mac Low

We examine the combined effects of winds and photoionizing radiation from O--type stars on embedded stellar clusters formed in model turbulent molecular clouds covering a range of masses and radii. We find that feedback is able to increase…

Astrophysics of Galaxies · Physics 2015-08-06 J. E. Dale , B. Ercolano , I. A. Bonnell

Circumbinary disks are found in a variety of astrophysical scenarios, spanning binary star formation to accreting supermassive black hole binaries. The interaction with a circumbinary disk can yield opposite effects on the binary orbit…

Numerical simulations of core-collapse supernovae, mergers of binary neutron stars and formation of stellar black holes, which employed standard Skyrme interactions, established clear correlations between the evolution of these processes,…

Nuclear Theory · Physics 2026-01-16 Adriana R. Raduta , Mikhail V. Beznogov

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 a model for the formation of high-mass close binary systems in the context of forming massive stars through gas accretion in the centres of stellar clusters. A low-mass wide binary evolves under mass accretion towards a high-mass…

Astrophysics · Physics 2009-11-13 Ian A. Bonnell , Matthew R. Bate

Star formation from the interstellar medium of galactic disks is a basic process controlling the evolution of galaxies. Understanding the star formation rate in a local patch of a disk with a given gas mass is thus an important challenge…

Astrophysics of Galaxies · Physics 2017-06-14 Michael J. Butler , Jonathan C. Tan , Romain Teyssier , Joakim Rosdahl , Sven Van Loo , Sarah Nickerson