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- W2180451105 abstract "We review many of the basic properties of star cluster systems, and focus in particular on how they relate to their host galaxy properties and ambient environment. The cluster mass and luminosity functions are well approximated by power-laws of the form $Ndm propto M^{alpha}dm$, with $alphasim-2$ over most of the observable range. However, there is now clear evidence that both become steeper at high masses/luminosities, with the value of the downward turn dependent on environment. The host galaxy properties also appear to affect the cluster formation efficiency ($Gamma$ - i.e., the fraction of stars that form in bound clusters), with higher star-formation rate density galaxies having higher $Gamma$ values. Within individual galaxies, there is evidence for $Gamma$ to vary by a factor of 3-4, likely following the molecular gas surface density, in agreement with recent predictions. Finally, we discuss cluster disruption and its effect on the observed properties of a population, focussing on the age distribution of clusters. We briefly discuss the expectations of theoretical and numerical studies, and also the observed distributions in a number of galaxies. Most observational studies now find agreement with theoretical expectations, namely nearly a constant cluster age distribution for ages up to ~100 Myr (i.e. little disruption), and a drastic steepening above this value caused by a combination of cluster disruption and incompleteness. Rapid cluster disruption for clusters with ages < 100 Myr is ruled out for most galaxies." @default.
- W2180451105 created "2016-06-24" @default.
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- W2180451105 date "2015-11-25" @default.
- W2180451105 modified "2023-10-16" @default.
- W2180451105 title "The Lifecycle of Clusters in Galaxies" @default.
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