Indicators for cluster survivability in a dispersing cloud

Hui Chen Chen, Chung Ming Ko

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We use N-body simulations to survey the response of embedded star clusters to the dispersal of their parent molecular cloud. The final stages of the clusters can be divided into three classes: the cluster (1) is destroyed, (2) has a loose structure, and (3) has a compact core. We are interested in three of the governing parameters of the parent cloud: (1) the mass, (2) the size, and (3) the dispersing rate. It is known that the final stage of the cluster is well correlated with the star formation efficiency (SFE) for systems with the same cluster and cloud profile. We deem that the SFE alone is not enough to address systems with clouds of different sizes. Our result shows that the initial cluster-cloud mass ratio at a certain Lagrangian radius and the initial kinetic energy are better indicators for the survivability of embedded clusters.

Original languageEnglish
Pages (from-to)1659-1665
Number of pages7
JournalAstrophysical Journal
Volume698
Issue number2
DOIs
StatePublished - 20 Jun 2009

Keywords

  • Galaxies: star clusters
  • Methods: N-body simulations
  • Open clusters and associations: general

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