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Molecular clouds are the most important incubators of young stars clustered in various stellar structures whose spatial extension can vary from a few AU to several thousand AU. Although the reality of these stellar systems has been…

In this chapter, we will cover how stars form from the stellar nurseries that are giant molecular clouds. We will first review the physical processes that compete to regulate star formation. We then review star formation in turbulent,…

Solar and Stellar Astrophysics · Physics 2025-11-06 Rajika Kuruwita , Łukasz Tychoniec , Christoph Federrath

Studies of evolved massive stars indicate that they form in a clustered mode. During the earliest evolutionary stages, these regions are embedded within their natal cores. Here, we show high-spatial-resolution interferometric dust continuum…

Astrophysics · Physics 2009-11-10 H. Beuther , P. Schilke

Local-box hydrodynamical model atmospheres provide statistical information about the spatial dependence, as well as temporal evolution, of a star's emergent radiation field. Here, we consider late-type stellar atmospheres for which temporal…

Astrophysics · Physics 2009-11-11 Hans-G. Ludwig

We extend our previous physically-based halo occupation distribution models to include the dependence of clustering on the spectral energy distributions of galaxies. The high resolution Millennium Simulation is used to specify the positions…

Astrophysics · Physics 2008-11-26 Lan Wang , Cheng Li , Guinevere Kauffmann , Gabriella De Lucia

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

More and more observations indicate that young star clusters could retain imprints of their formation process. In particular, the degree of substructuring and rotation are possibly the direct result of the collapse of the parent molecular…

Astrophysics of Galaxies · Physics 2020-06-17 Alessandro Ballone , Michela Mapelli , Ugo N. Di Carlo , Stefano Torniamenti , Mario Spera , Sara Rastello

The formation of the first galaxies at redshifts z ~ 10-15 signaled the transition from the simple initial state of the universe to one of ever increasing complexity. We here review recent progress in understanding their assembly process…

We present models for the initial mass function (IMF) for stars forming within molecular clouds. These models use the idea that stars determine their own masses through the action of powerful stellar outflows. This concept allows us to…

Astrophysics · Physics 2009-10-28 Fred C. Adams , Marco Fatuzzo

We review the statistical properties of stars and brown dwarfs obtained from the first hydrodynamical simulation of star cluster formation to produce more than a thousand stars and brown dwarfs while simultaneously resolving the lowest mass…

Solar and Stellar Astrophysics · Physics 2015-05-18 Matthew R. Bate

In the first article of this series, we have used the ergodic theory to assess the validity of a statistical approach to characterize various properties of star-forming molecular clouds (MCs) from a limited number of observations or…

Astrophysics of Galaxies · Physics 2022-08-03 Etienne Jaupart , Gilles Chabrier

We present a new implementation of star formation in cosmological simulations, by considering star clusters as a unit of star formation. Cluster particles grow in mass over several million years at the rate determined by local gas…

Astrophysics of Galaxies · Physics 2017-01-11 Hui Li , Oleg Y. Gnedin , Nickolay Y. Gnedin , Xi Meng , Vadim A. Semenov , Andrey V. Kravtsov

In Meidt et al. (2018), we showed that gas kinematics on the scale of individual molecular clouds are not dominated by self-gravity but also track a component that originates with orbital motion in the potential of the host galaxy. This…

Observational evidence from local star-forming regions mandates that star formation occurs shortly after, or even during, molecular cloud formation. Models of the formation of molecular clouds in large-scale converging flows have identified…

Astrophysics of Galaxies · Physics 2015-05-27 Jonathan Carroll-Nellenback , Adam Frank , Fabian Heitsch

We study star-formation-inducing mechanisms in galaxies through multi- wavelength measurements of a sample of dwarf galaxies in the Virgo cluster described in paper I. Our main goal is to test how star formation inducing mechanisms depend…

Astrophysics · Physics 2008-02-03 Elchanan Almoznino , Noah Brosch

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 the formation of star clusters in an unbound GMC, where the supporting kinetic energy is twice as large as the cloud's self-gravity. This cloud manages to form a series of star clusters and disperse, all within roughly 2…

Astrophysics · Physics 2014-10-13 Paul C. Clark , Ian A. Bonnell , Hans Zinnecker , Matthew R. Bate

Using adaptive mesh refinement (AMR) hydrodynamic simulations of vertically stratified hot halo gas, we examine the conditions under which clouds can form and condense out of the hot halo medium to potentially fuel star formation in the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 M. Ryan Joung , Greg L. Bryan , Mary E. Putman

In our grid of multiphase chemical evolution models (Moll\'a & D\'iaz, 2005), star formation in the disk occurs in two steps: first, molecular gas forms, and then stars are created by cloud-cloud collisions or interactions of massive stars…

Astrophysics of Galaxies · Physics 2017-04-12 Mercedes Mollá , Ángeles I. Díaz , Yago Ascasibar , Brad K. Gibson

We demonstrate that single and binary star clusters can be formed during cloud-cloud collisions triggered by the tidal interaction between the Large and Small Magellanic clouds. We run two different sets of self-consistent numerical…

Astrophysics · Physics 2009-11-10 Kenji Bekki , Michael A. Beasley , Duncan A. Forbes , Warrick J. Couch
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