Hierarchical systems in globular clusters

Arkadiusz Hypki

The paper introduces preliminary results of the improved version of the MOCCA code which is now able to follow the formation and evolution of hierarchical systems (e.g. triple and quadruple stars) in star clusters. The masses of binaries which formed hierarchical systems due to strong dynamical interactions are on average larger than the average masses of all binaries, as expected. However, these higher masses do not seem to come from the fact that hierarchical systems consist of at least three stars – it is rather caused by the fact that the inner binary is massive itself. The third star, in the case of a triple system, is typically a low mass object.

Proceedings of the Polish Astronomical Society, vol. 7, 157-161 (2018)

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