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Observations that resolve nearby galaxies into individual regions across multiple phases of the gas-star formation-feedback ``matter cycle'' have provided a sharp new view of molecular clouds, star formation efficiencies, timescales for…

星系天体物理 · 物理学 2024-04-01 Eva Schinnerer , Adam K. Leroy

We present a one-dimensional radiation-hydrodynamic model of a spherically symmetric cloud evolving under the influence of the self-gravity and the feedback from a star cluster forming in its centre. On one hand, the model is simple due to…

We present results from recent simulations of the formation and evolution of clusters of galaxies in a LambdaCDM cosmology. These simulations contain our most physically complete input physics to date including radiative cooling, star…

天体物理学 · 物理学 2007-05-23 P. M. Motl , J. O. Burns , M. L. Norman , G. L. Bryan

Whether or not the initial star cluster mass function is established through a universal, galactocentric-distance-independent stochastic process, on the scales of individual galaxies, remains an unsolved problem. This debate has recently…

星系天体物理 · 物理学 2016-01-20 Weijia Sun , Richard de Grijs , Zhou Fan , Ewan Cameron

Giant molecular clouds (GMCs) are well-studied in the local Universe, however, exactly how their properties vary during galaxy evolution is poorly understood due to challenging resolution requirements, both observational and computational.…

Although the basic physics of star formation is classical, numerical simulations have yielded essential insights into how stars form. They show that star formation is a highly nonuniform runaway process characterized by the emergence of…

天体物理学 · 物理学 2008-11-26 Richard B. Larson

We propose a self-consistent model for globular cluster formation in, but not limited to, our Galaxy, based on the merger model of Mathews and Schramm (1993). Stars and star clusters form in bursts at the merging interfaces as protogalactic…

天体物理学 · 物理学 2009-10-22 Sangjin Lee , David N. Schramm , Grant J. Mathews

Stars and star clusters form by gravoturbulent fragmentation of interstellar gas clouds. The supersonic turbulence ubiquitously observed in Galactic molecular gas generates strong density fluctuations with gravity taking over in the densest…

星系天体物理 · 物理学 2015-05-30 Ralf S. Klessen

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…

星系天体物理 · 物理学 2022-05-25 Jeremy Karam , Alison Sills

We investigate the formation of both clustered and distributed populations of young stars in a single molecular cloud. We present a numerical simulation of a 10,000 solar mass elongated, turbulent, molecular cloud and the formation of over…

星系天体物理 · 物理学 2015-05-19 Ian A. Bonnell , Rowan J. Smith , Paul C. Clark , Matthew R. Bate

We describe an overall picture of galactic-scale star formation. Recent high-resolution magneto-hydrodynamical simulations of two-fluid dynamics with cooling/heating and thermal conduction have shown that the formation of molecular clouds…

星系天体物理 · 物理学 2015-07-29 Shu-ichiro Inutsuka , Tsuyoshi Inoue , Kazunari Iwasaki , Takashi Hosokawa

Using three-dimensional smoothed particle hydrodynamics simulations, we investigate the formation of multiple stellar populations (MSPs) in globular clusters (GCs) within the context of their parent galaxies. In our scenario, the second…

星系天体物理 · 物理学 2021-01-08 Madeleine McKenzie , Kenji Bekki

We have carried out a large set of N-body simulations studying the effect of residual-gas expulsion on the survival rate and final properties of star clusters. We have varied the star formation efficiency, gas expulsion timescale and…

天体物理学 · 物理学 2009-11-13 Holger Baumgardt , Pavel Kroupa

Star formation is intimately linked to the dynamical evolution of molecular clouds. Turbulent fragmentation determines where and when protostellar cores form, and how they contract and grow in mass via accretion from the surrounding cloud…

天体物理学 · 物理学 2007-05-23 Ralf Klessen

The infall and merger scenario of massive clusters in the Milky Way's potential well, as one of the Milky Way formation mechanisms, is reexamined to understand how the stars of the merging clusters are redistributed during and after the…

星系天体物理 · 物理学 2023-06-21 Maria Gabriela Navarro , Roberto Capuzzo-Dolcetta , Manuel Arca-Sedda , Dante Minniti

Stars form by gravoturbulent fragmentation of interstellar gas clouds. The supersonic turbulence ubiquitously observed in Galactic molecular gas generates strong density fluctuations with gravity taking over in the densest and most massive…

天体物理学 · 物理学 2007-05-23 Ralf S. Klessen , Javier Ballesteros-Paredes , Yuexing Li , Mordecai-Mark Mac Low

Massive star clusters observed in galaxy mergers are often suggested to be progenitors of globular clusters. To study this hypothesis, we performed the highest resolution simulation of a gas-rich galaxy merger so far. The formation of…

天体物理学 · 物理学 2009-11-13 F. Bournaud , P. -A. Duc , E. Emsellem

Stars form in dense, clustered environments, where feedback from newly formed stars eventually ejects the gas, terminating star formation and leaving behind one or more star clusters. Using the STARFORGE simulations, it is possible to…

Massive stars are key players in the evolution of galaxies, yet their formation pathway remains unclear. In this work, we use data from several galaxy-wide surveys to build an unbiased dataset of ~700 massive young stellar objects (MYSOs),…

星系天体物理 · 物理学 2016-11-23 B. B. Ochsendorf , M. Meixner , J. Chastenet , A. G. G. M. Tielens , J. Roman-Duval

The formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive clusters with similar masses as globular clusters and may hold the key to understanding their formation. We study…