Effects of stellar collisions on star cluster evolution and core collapse

Sourav Chatterjee*, John M. Fregeau, Frederic A. Rasio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We systematically study the effects of collisions on the overall dynamical evolution of dense star clusters using Monte Carlo simulations over many relaxation times. We derive many observable properties of these clusters, including their core radii and the radial distribution of collision products. We also study different aspects of collisions in a cluster taking into account the shorter lifetimes of more massive stars, which has not been studied in detail before. Depending on the lifetimes of the significantly more massive collision products, observable properties of the cluster can be modified qualitatively; for example, even without binaries, core collapse can sometimes be avoided simply because of stellar collisions.

Original languageEnglish (US)
Pages (from-to)151-154
Number of pages4
JournalProceedings of the International Astronomical Union
Issue numberS246
StatePublished - Sep 2007


  • (Galaxy:) globular clusters: general
  • (stars:) blue stragglers
  • Methods: numerical
  • Scattering
  • Stellar dynamics

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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