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Formation of massive stars within embedded star clusters starts a complex interplay between their feedback, inflowing gas and stellar dynamics, which often includes close stellar encounters. Hydrodynamical simulations usually resort to…

Astrophysics of Galaxies · Physics 2020-09-02 F. Dinnbier , S. Walch

Observations and high-resolution hydrodynamical simulations indicate that massive star clusters form through a complex hierarchical assembly. We use simulations including post-Newtonian dynamics (the BIFROST code) and stellar evolution (the…

Astrophysics of Galaxies · Physics 2025-09-09 Antti Rantala , Natalia Lahén , Thorsten Naab , Gastón J. Escobar , Giuliano Iorio

We present a theoretical framework in which bound stellar clusters arise naturally at the high-density end of the hierarchy of the interstellar medium (ISM). Due to short free-fall times, these high-density regions achieve high local star…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 J. M. Diederik Kruijssen

We investigate the properties of the intracluster medium (ICM) that forms within N-body/hydrodynamical simulations of galaxy clusters in a \LambdaCDM cosmology. When radiative cooling and a simple model for galactic feedback are included,…

Astrophysics · Physics 2009-11-10 Scott T. Kay , Peter A. Thomas , Adrian Jenkins , Frazer R. Pearce

We present the results of a series of numerical simulations of compressible, self-gravitating hydrodynamic turbulence of cluster-forming clumps in molecular clouds. We examine the role that turbulence has in the formation of gravitationally…

Astrophysics · Physics 2009-11-10 David A. Tilley , Ralph E. Pudritz

Star cluster formation in giant molecular clouds involves the local collapse of the cloud into small gas-rich subclusters, which can then subsequently collide and merge to build up the final star cluster(s). In this paper, we simulate…

Astrophysics of Galaxies · Physics 2022-05-25 Jeremy Karam , Alison Sills

We discuss how helium sedimentation in galaxy clusters can affect the history of star formation in the central cluster galaxy. As helium sediments, the gas density in the inner regions of the cluster increases and there is also a…

Astrophysics of Galaxies · Physics 2025-12-23 J. Racker , N. Padilla

Two puzzles associated with open clusters have attracted a lot of attention -- their formation, with densities and velocity dispersions that are not too different from those of the star forming regions in the Galaxy, given that the observed…

Astrophysics of Galaxies · Physics 2015-06-15 K. Indulekha

Supernova explosions (SNe) are among the most energetic events in the Universe. After the explosion, the material ejected by the Supernova expands throughout the interstellar medium (ISM) forming what is called Supernova Remnant (SNR).…

High Energy Astrophysical Phenomena · Physics 2025-02-12 Giuseppe Prete , Silvia Perri , Claudio Meringolo , Leonardo Primavera , Sergio Servidio

The ISM, powered by SNe, is turbulent and permeated by a magnetic field (with a mean and a turbulent component). It constitutes a frothy medium that is mostly out of equilibrium and is ram pressure dominated on most of the temperature…

Astrophysics of Galaxies · Physics 2010-10-28 Miguel A. de Avillez , Dieter Breitschwerdt

Most star formation in the Galaxy takes place in clusters, where the most massive members can affect the properties of other constituent solar systems. This paper considers how clusters influence star formation and forming planetary systems…

Solar and Stellar Astrophysics · Physics 2015-06-19 Fred C. Adams , Marco Fatuzzo , Lisa Holden

Magnetic fields are ubiquitously observed in the interstellar medium (ISM) of present-day star-forming galaxies with dynamically relevant energy densities. Using three-dimensional magneto-hydrodynamic (MHD) simulations of the supernova (SN)…

Molecular clouds are turbulent structures whose star formation efficiency (SFE) is strongly affected by internal stellar feedback processes. In this paper we determine how sensitive the SFE of molecular clouds is to randomised inputs in the…

Astrophysics of Galaxies · Physics 2019-06-20 Sam Geen , Stuart K. Watson , Joakim Rosdahl , Rebekka Bieri , Ralf S. Klessen , Patrick Hennebelle

We present hydrodynamic simulations of a major merger of disk galaxies, and study the ISM dynamics and star formation properties. High spatial and mass resolutions of 12pc and 4x10^4 M_sol allow to resolve cold and turbulent gas clouds…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Romain Teyssier , Damien Chapon , Frederic Bournaud

We present high resolution ($1024^3$) simulations of super-/hyper-sonic isothermal hydrodynamic turbulence inside an interstellar molecular cloud (resolving scales of typically 20 -- 100 AU), including a multi-disperse population of dust…

Astrophysics of Galaxies · Physics 2018-12-19 Lars Mattsson , Akshay Bhatnagar , Fred A. Gent , Beatriz Villarroel

Recent observations and hydrodynamical simulations of star formation inside a giant molecular cloud have revealed that, within a star forming region, stars do not form evenly distributed throughout this region, but rather in small…

Astrophysics of Galaxies · Physics 2015-05-13 M. Fellhauer , M. I. Wilkinson , P. Kroupa

In a previous paper we investigated the energy transfer of massive stars to the interstellar medium as a function of time and the geometrical configuration of three massive stars via 3D-mesh-refining hydrodynamics simulations, following the…

Astrophysics of Galaxies · Physics 2014-07-02 Martin Krause , Roland Diehl , Hans Böhringer , Michael Freyberg , Daniel Lubos

We explore the effect of magnetic fields on the vertical distribution and multiphase structure of the supernova-driven interstellar medium (ISM) in simulations that admit dynamo action. As the magnetic field is amplified to become…

Astrophysics of Galaxies · Physics 2019-09-26 C. C. Evirgen , F. A. Gent , A. Shukurov , A. Fletcher , P. J. Bushby

We study the evolution of embedded clusters. The equations of motion of the stars in the cluster are solved by direct N-body integration while taking the effects of stellar evolution and the hydrodynamics of the natal gas content into…

Solar and Stellar Astrophysics · Physics 2015-06-03 F. I. Pelupessy , S. Portegies Zwart

We present the results of numerical studies of supernova remnant evolution and their effects on galactic and globular cluster evolution. We show that parameters such as the density and the metallicity of the environment significantly…

Astrophysics · Physics 2009-10-30 Katsuyo Thornton , Michael Gaudlitz , Hans-Thomas Janka , Matthias Steinmetz