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- W3100648229 abstract "Recent observations have revealed a variety of young star clusters, including embedded systems, young massive clusters, and associations. We study the formation and dynamical evolution of these clusters using a combination of simulations and theoretical models. Our simulations start with a turbulent molecular cloud that collapses under its own gravity. The stars are assumed to form in the densest regions in the collapsing cloud after an initial free-fall time of the molecular cloud. The dynamical evolution of these stellar distributions is continued by means of direct N-body simulations. The molecular clouds typical of the Milky Way Galaxy tend to form embedded clusters that evolve to resemble open clusters. The associations were initially considerably more clumpy, but they lost their irregularity in about a dynamical timescale, due to the relaxation process. The densest molecular clouds, which are absent in the Milky Way but are typical in starburst galaxies, form massive, young star clusters. They indeed are rare in the Milky Way. Our models indicate a distinct evolutionary path from molecular clouds to open clusters and associations or to massive star clusters. The mass–radius relation for both types of evolutionary tracks excellently matches the observations. According to our calculations, the time evolution of the half-mass–radius relation for open clusters and associations follows , whereas for massive star clusters . Both trends are consistent with the observed age–mass–radius relation for clusters in the Milky Way." @default.
- W3100648229 created "2020-11-23" @default.
- W3100648229 creator A5019507690 @default.
- W3100648229 creator A5032042155 @default.
- W3100648229 date "2016-01-18" @default.
- W3100648229 modified "2023-10-12" @default.
- W3100648229 title "THE FORMATION AND DYNAMICAL EVOLUTION OF YOUNG STAR CLUSTERS" @default.
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- W3100648229 doi "https://doi.org/10.3847/0004-637x/817/1/4" @default.
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