Effects of stellar collisions on star cluster evolution and core collapse

Details Effects of stellar collisions on star cluster evolution and core collapse Effects of stellar collisions on star cluster evolution and core collapse

2007-10-16

arxiv.org/abs/0710.3062v1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, Submitted for the IAU symposium, 246 in Capri, Italy

Scientific paper

10.1017/S1743921308015494

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.

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