Young Massive Star Clusters
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TLDR
A review of the current state of the art in observations and dynamical modeling of young massive star clusters can be found in this paper, where the authors focus on star clusters younger than 100$ Myr, more than a few current crossing times old, and more massive than 10^4$Msun.Abstract:
Young massive clusters are dense aggregates of young stars that form the fundamental building blocks of galaxies. Several examples exist in the Milky Way Galaxy and the Local Group, but they are particularly abundant in starburst and interacting galaxies. The few young massive clusters that are close enough to resolve are of prime interest for studying the stellar mass function and the ecological interplay between stellar evolution and stellar dynamics. The distant unresolved clusters may be effectively used to study the star-cluster mass function, and they provide excellent constraints on the formation mechanisms of young cluster populations. Young massive clusters are expected to be the nurseries for many unusual objects, including a wide range of exotic stars and binaries. So far only a few such objects have been found in young massive clusters, although their older cousins, the globular clusters, are unusually rich in stellar exotica. In this review we focus on star clusters younger than $\sim100$ Myr, more than a few current crossing times old, and more massive than $\sim10^4$ \Msun, irrespective of cluster size or environment. We describe the global properties of the currently known young massive star clusters in the Local Group and beyond, and discuss the state of the art in observations and dynamical modeling of these systems. In order to make this review readable by observers, theorists, and computational astrophysicists, we also review the cross-disciplinary terminology.read more
Citations
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Journal ArticleDOI
Star Formation in the Milky Way and Nearby Galaxies
TL;DR: In this paper, the authors review progress over the past decade in observations of large-scale star formation, with a focus on the interface between extragalactic and Galactic studies.
Journal ArticleDOI
Binary Interaction Dominates the Evolution of Massive Stars
Hugues Sana,S. E. de Mink,S. E. de Mink,A. de Koter,A. de Koter,Norbert Langer,Chris Evans,Mark Gieles,Eric Gosset,Robert G. Izzard,J.-B. Le Bouquin,Fabian Schneider +11 more
TL;DR: More than 70% of all massive stars will exchange mass with a companion, leading to a binary merger in one-third of the cases, greatly exceed previous estimates and imply that binary interaction dominates the evolution of massive stars, with implications for populations ofmassive stars and their supernovae.
Journal ArticleDOI
A Universal Stellar Initial Mass Function? A Critical Look at Variations
TL;DR: In this article, a review of reports of stellar initial mass function variations is presented, with a view toward whether other explanations are sufficient given the evidence, concluding that the vast majority were drawn from a universal system IMF: a power law of Salpeter index (Γ = 1.35) above a few solar masses, and a log normal or shallower power law (∆ ∼ 0.25) for lower mass stars.
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Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters
TL;DR: Recently, it has been shown that globular clusters are not simple stellar populations, being rather made of multiple generations as mentioned in this paper, leading to a new paradigm for the formation of massive star clusters, which includes several episodes of star formation.
Journal ArticleDOI
Multiple populations in globular clusters
TL;DR: Recently, it has been shown that globular clusters are not simple stellar populations, but rather are made up of multiple generations as discussed by the authors, which provides an explanation for the second-parameter problem and opens new perspectives on the relation between globular cluster and the halo of our Galaxy.
References
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